SCIENCE PART 1 AND 2 | 暗記メーカー

暗記メーカー

SCIENCE PART 1 AND 2

238問 • 5ヶ月前

問題一覧

1

The students were arguing about the results of their experiment. Following were their comments: Student A: “Our conclusion is wrong. It is the opposite of what we learned the lecture.” Students B and C: That’s what came out. After we designed the experiment and observed for two weeks we should not change the results. Student D: Maybe, it’s good to find out why our findings differ from what was given in the lecture. Why not repeat the same experiment? Which trait of a scientist does student A seem NOT have?

Open-mindedness

2

The students were arguing about the results of their experiment. Following were their comments: Student A: “Our conclusion is wrong. It is the opposite of what we learned the lecture.” Students B and C: That’s what came out. After we designed the experiment and observed for two weeks we should not change the results. Student D: Maybe, it’s good to find out why our findings differ from what was given in the lecture. Why not repeat the same experiment? Students B and C display which part of a scientist?

Truthfulness

3

The students were arguing about the results of their experiment. Following were their comments: Student A: “Our conclusion is wrong. It is the opposite of what we learned the lecture.” Students B and C: That’s what came out. After we designed the experiment and observed for two weeks we should not change the results. Student D: Maybe, it’s good to find out why our findings differ from what was given in the lecture. Why not repeat the same experiment? Why can Student D be said to have the bearing of a scientist?

He/She has a critical mind

4

Marco is always interested in asking questions. He is also very eager to find the answers to his questions. What scientific attitude is he displaying?

Curiosity

5

Monica respects the ideas of her colleagues even if they are very much contrary to her own beliefs. What important scientific attitude is seen in her actions?

Open-mindedness

6

Carlito weighs evidences dutifully making any conclusions and decisions. He dissects the information individually before coming to a final conclusion. What scientific attitude is he displaying?

Rationality

7

While performing an experiment, Mico expresses his opinions and tries new ideas even at the risk of failure or criticism. What scientific trait is displayed in this situation?

Risk-taking

8

Paul admits that he is not free from committing errors. He recognizes that there may be better ideas and realizes that there are individuals whom he may have to consult to arrive at correct observations and conclusions. What scientific trait is he displaying?

Humility

9

While performing research for a pharmaceutical company, Melanie gave a truthful report of observations. She did not withhold important information just to please herself or her company. What scientific attitude did she display?

Intellectual honesty

10

Chona actively participates in a task and also dutifully performs tasks assigned to her. What scientific attitude in this situation?

Responsibility

11

Fernan always seeks to think outside the box. He always aims to generate new original ideas. What scientific attitude is he displaying?

Inventiveness

12

Adolfo does not allow his feelings and biases to influence his recording observations, interpretation of data, and

Objectivity

13

Dennis bases suggestions and conclusions on evidences. When in doubt, questions the veracity of a statement in relation to the evidences presented. What scientific attitude is seen in his actions?

Critical-mindedness

14

Jose believes that everything that happens in this world has a cause or reason. What scientific attitude is seen in his actions?

Firm set of beliefs Critical-mindedness

15

Pepita believes that God is the ultimate source of all wisdom. She upholds that it is through God's grace that she is able to discover the mysteries God's creations. What scientific attitude is she displaying?

Faith in God

16

Alice does not allow her judgement to be influenced by her likes and dislikes. What scientific attitude is seen in her actions?

Absence of bias

17

Miguel only creates inventions that respect and help conserve natural resources and is an advocate against pollution and illegal logging. What scientific attitude is seen in his actions?

Concern for the environment

18

Nicolaus Copernicus believed that the church was wrong about the sun revolving around the Earth. Advancing his theory that the earth revolved around the sun eventually cost him his life. What scientific attitude is seen in his actions?

Revolutionary

19

If two variables X and Y are directly related, which of these is NOT true?

When X increases, Y decreases.

20

Read the following, then answer the questions. Beda wants to find out if different types of wood soak up the same amount of water when wet. She plans to do the following: I. Weigh a dry block of each type of wood II. Put each block into a container full of water III. Leave the wood in the water IV. Take the wood out, dry the outside of each block and reweigh. V. Calculate the amount of water soaked up. QUESTION: To be a fair test, what variables should she control? I. Size of each block II. Time left in water III. Type of wood IV. Amount of water

I and II

21

Beda wants to find out if different types of wood soak up the same amount of water when wet. She plans the steps listed. In this experiment, what is the dependent variable?

The amount of water soaked up

22

Beda's wood experiment: What is the independent variable?

Type of wood used

23

A class designed an experiment: three detergents (Tide, Surf, Champion) were tested on three different fish species kept in different sizes/shapes of bottles: tilapia + Tide, goldfish + Surf, janitor fish + Champion. What is the control group?

Cannot be determined

24

In the same detergent-fish experiment, what is the experimental group?

The baby janitor fish with 1 tbsp of Champion, The tilapia with 1 tbsp of Tide, The goldfish with 1 tbsp of Surf

25

In the detergent-fish experiment described, what is the dependent variable?

The effect of detergent on fish

26

Is there any defect in the class's experimental design (different fishes, different bottle sizes/shapes, different detergents each)?

Yes, not only one but several.

27

To improve the detergent-fish experiment they designed, which of the following should be done? I. Just focus on one dependent variable at a time. II. Use the same type and size of fish. III. Increase the number of fish and reduce the number of detergent brands involved.

I and III

28

Printed on a bottle of cough medicine: “Store away from light, below 30°C.” What can you infer about the cough medicine?

It is affected by heat and light.

29

It is commonly observed that many respondents to survey checklists just check answers without reading. What conclusion can be derived from this observation?

Data gathered by way of questionnaire checklists are not very reliable.

30

Teacher M showed potted plants on a windowsill and asked why they tended to grow outward. What was Teacher M engaging the pupils to do?

Formulate hypothesis

31

The existence of extraterrestrial life may never be proven, but this idea will become more scientifically acceptable over time if ____________.

Increasing scientific evidence supports the idea.

32

Which comes ahead in the scientific method — observation or defining the problem?

No definite answer. What you observe makes you think of a problem and a problem makes you observe.

33

You want to know how many pupils have mothers who are presently employed as OCWs. What is/are the most reliable way(s) to gather data? I. Interview the pupils. II. Give questionnaire checklist to selected pupils. III. Study the grade of the pupils because poor performance usually correlates with OCW parents.

I only

34

Which of the following has the smallest mass when measured in an equal-arm balance?

1/8 sheet of pad paper

35

Student F computes results up to the second decimal place. As a researcher or scientist, which trait(s) does Student F possess? I. Accuracy II. Critical-mindedness III. Objectivity IV. Truthfulness

I. Accuracy, IV. Truthfulness

36

Which does NOT belong? A. Conclusion B. Surmise C. Hypothesis D. Conjecture

Conclusion

37

Nancy wanted to find out if virgin coconut oil (VCO) can be used as a preservative for peanuts. She placed 10 peanuts each in 2 glasses. In one glass she added enough VCO to cover the peanuts; the other glass had no liquid. She kept both on a shelf and observed for two weeks. Which among the following statements is the best problem statement for Nancy’s experiment?

Is virgin coconut oil useful as a preservative for peanuts?

38

In Nancy's peanut/VCO experiment, which among the following is NOT a controlled variable?

Amount of virgin coconut oil.

39

From Nancy's experiment, which of the following is an observation that may derive? I. Only four peanuts dried up in the glass without virgin coconut oil because of room temperature. II. Six peanuts did not dry up in the glass with virgin coconut oil. III. The duration of 2 weeks for this experiment is too long. IV. Peanuts did not wither in virgin coconut oil because of the presence of stearic acid.

I and II

40

In Nancy’s experiment, what is the independent variable?

Presence or absence of virgin coconut oil

41

How many manipulated variables are present in this experiment?

One

42

What is a suitable null hypothesis for this experiment?

Virgin coconut oil has no significant preservative effect on peanuts.

43

During a period of increased global temperatures, which of the following is most likely to occur?

An increase in atmospheric CO2.

44

Why is the Philippines much hotter than Canada? The Philippines ________________

Receive sun rays closer to vertical position.

45

Geothermal energy, an energy resource in the country, is based on which phenomenon?

There are concentrations of heat in some places of earth’s crust.

46

Which of these effects generally occurs as a result of a warm air mass and a cooler air mass converging at Earth’s surface?

Stormy weather patterns develop.

47

Why do fisher folks catch more fish during the new moon than during the full moon?

Fishes are attracted to the light from the fishing boat which fishermen make use of during the new moon.

48

Bagoong smells because ____________.

Molecules from bagoong spread in air.

49

Every morning when the sun shines through the glass jalousies of Maria’s window, she sees a rainbow on her wall. Which could explain this?

The glass jalousies break up the beam of sunlight into the colors of the rainbow.

50

Which of the following is TRUE about light and seeing?

Light hits an object, bounces, and then enters the eyes.

51

Why do leaves with green color look green in the sunlight?

They reflect green light.

52

Why does the level of water in a beaker rise after a stone is placed in it?

The stone takes the place occupied by water.

53

Why do people feel their ears pop or crack when they are up in the air?

There are less air particles.

54

Which of the following activities help reduce water pollution?

Treating wastewater before it is discharged.

55

The manager of a textile factory considers it too expensive to treat liquid waste so he suggests digging a hole near the factory where the wastes can be stored. Is this environmentally safe?

No, the liquid wastes will seep to the groundwater.

56

Why are nights cooler when the sky is clear than when it is overcast?

There is no cloud cover to prevent heat from escaping.

57

Water covers about 75% of the Earth’s surface and yet some people still do not have enough water to drink. Which reasons are correct? I. Most of the world’s water is salty. II. Most of our bodies of water are polluted by chemicals. III. Most fresh water are frozen in ice caps.

I, II and III

58

Children born with a deficiency of thyroxin __________ if the deficiency is not checked.

Become mentally retarded

59

The correct way of eating fruits is when eaten __________.

With an empty stomach

60

An eclipse of the sun throws the shadow of the __________.

Moon on the earth

61

The following are effects of global warming EXCEPT __________.

Thinning of the ozone layer

62

John experienced a lack of growth hormone (GH) as a child. Now that John is an adult, it is likely that he __________.

Has normal adult body proportions, but an extremely short stature

63

Which among the following represents the smallest unit of life?

Cell

64

Which of the following statements about living things is FALSE?

All living things have a nervous system

65

Which of the following best describes a group of cells that work together to perform a function?

Tissue

66

Which among the following are duplicated during the process of mitosis?

Chromosomes

67

Plants create their own food by absorbing and processing sunlight. The ability to produce one’s own food source is a metabolic process known as __________.

Autotrophy

68

Fungi absorb nutrients from dead organisms. In an ecosystem, what role do they play?

Saprophytes (decomposers)

69

Which among the following cell organelles does NOT participate in cellular division?

Ribosomes

70

Which of the following is an example of a symbiotic relationship?

Weeds clinging to the roots of trees in your backyard

71

Which of the following is NOT an example of a naturally occurring sugar?

Mitose

72

Which of the following is the proper example of natural selection?

Albino rodents die off quickly in a community, being more vulnerable to certain diseases

73

What is the main difference between prokaryotes and eukaryotes?

The eukaryote has a nucleus, but the prokaryote does not

74

Which of the following statements is TRUE about parasites and their relationships with their hosts?

The parasite enjoys the benefits of a relationship in which the host is harmed or killed

75

Vascular tissue that transports water in leaves connects directly to which of the following?

Xylem in the stem

76

One immediate cause of a decrease in the rate of photosynthesis is a reduction in the availability of which substance?

Carbon dioxide

77

Which type of digestion occurs in the mouth when an individual chews a piece of bread?

Both mechanical and chemical digestion

78

Which among the following gases is green in color?

Chlorine

79

What does a pH below 7 indicate?

Acidity

80

Which of the following best describes the amount of energy required to remove an electron from a gaseous atom?

Ionization energy

81

Which among the following has the most polar bond?

HF

82

A molecule or an ion is classified as a Lewis base if it has which of the following properties?

Donates pair of electrons

83

Which among the following elements can be drawn into thin wires and hammered into thin sheets?

Cu

84

Alchemists in ancient Egypt tested gold for purity by remelting it and heating it; if the gold became whiter, it contained _____.

Silver

85

Salts of which of the following metals are added to fireworks to make them brilliant red?

Strontium

86

What intermolecular forces do geckos and other lizards use to stick to walls and ceilings?

Van der Waals forces

87

If no more solute can be dissolved in a solvent at a given temperature, then that solution is called _____.

Saturated

88

A horizontal row of elements on the Periodic Table is known as a(n) _____.

Period or Series

89

According to the modern periodic table law, the chemical properties of the elements are periodic functions of their _____.

Atomic number

90

The amount of substance having 6.02 x 10^23 of any kind of chemical unit is called a(n) _____.

Mole

91

Breaking up a solid speeds dissolving in a liquid by _____.

Increasing surface area

92

Fats do not dissolve in water because fats _____.

are nonpolar and water is polar

93

What is the location on the Earth's surface that is directly above the place where an earthquake originates?

Epicenter

94

If there are several earthquakes in a row, what is the name of the largest of these earthquakes?

Mainshock

95

What is the partially molten layer of the Earth called?

Asthenosphere

96

What part of Earth is thought to be composed of iron and nickel?

Core

97

What is the numerical value for the hardest mineral on the Mohs hardness scale?

10

98

Which among the following properties is a measure of how easily a mineral can be scratched?

Hardness

99

Rock fragments thrown into the air during a volcanic eruption are called _____.

Tephra

100

What is a pyroclastic flow?

A mixture of volcanic gas, ash and other tephra

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問題一覧

1

The students were arguing about the results of their experiment. Following were their comments: Student A: “Our conclusion is wrong. It is the opposite of what we learned the lecture.” Students B and C: That’s what came out. After we designed the experiment and observed for two weeks we should not change the results. Student D: Maybe, it’s good to find out why our findings differ from what was given in the lecture. Why not repeat the same experiment? Which trait of a scientist does student A seem NOT have?

Open-mindedness

2

The students were arguing about the results of their experiment. Following were their comments: Student A: “Our conclusion is wrong. It is the opposite of what we learned the lecture.” Students B and C: That’s what came out. After we designed the experiment and observed for two weeks we should not change the results. Student D: Maybe, it’s good to find out why our findings differ from what was given in the lecture. Why not repeat the same experiment? Students B and C display which part of a scientist?

Truthfulness

3

The students were arguing about the results of their experiment. Following were their comments: Student A: “Our conclusion is wrong. It is the opposite of what we learned the lecture.” Students B and C: That’s what came out. After we designed the experiment and observed for two weeks we should not change the results. Student D: Maybe, it’s good to find out why our findings differ from what was given in the lecture. Why not repeat the same experiment? Why can Student D be said to have the bearing of a scientist?

He/She has a critical mind

4

Marco is always interested in asking questions. He is also very eager to find the answers to his questions. What scientific attitude is he displaying?

Curiosity

5

Monica respects the ideas of her colleagues even if they are very much contrary to her own beliefs. What important scientific attitude is seen in her actions?

Open-mindedness

6

Carlito weighs evidences dutifully making any conclusions and decisions. He dissects the information individually before coming to a final conclusion. What scientific attitude is he displaying?

Rationality

7

While performing an experiment, Mico expresses his opinions and tries new ideas even at the risk of failure or criticism. What scientific trait is displayed in this situation?

Risk-taking

8

Paul admits that he is not free from committing errors. He recognizes that there may be better ideas and realizes that there are individuals whom he may have to consult to arrive at correct observations and conclusions. What scientific trait is he displaying?

Humility

9

While performing research for a pharmaceutical company, Melanie gave a truthful report of observations. She did not withhold important information just to please herself or her company. What scientific attitude did she display?

Intellectual honesty

10

Chona actively participates in a task and also dutifully performs tasks assigned to her. What scientific attitude in this situation?

Responsibility

11

Fernan always seeks to think outside the box. He always aims to generate new original ideas. What scientific attitude is he displaying?

Inventiveness

12

Adolfo does not allow his feelings and biases to influence his recording observations, interpretation of data, and

Objectivity

13

Dennis bases suggestions and conclusions on evidences. When in doubt, questions the veracity of a statement in relation to the evidences presented. What scientific attitude is seen in his actions?

Critical-mindedness

14

Jose believes that everything that happens in this world has a cause or reason. What scientific attitude is seen in his actions?

Firm set of beliefs Critical-mindedness

15

Pepita believes that God is the ultimate source of all wisdom. She upholds that it is through God's grace that she is able to discover the mysteries God's creations. What scientific attitude is she displaying?

Faith in God

16

Alice does not allow her judgement to be influenced by her likes and dislikes. What scientific attitude is seen in her actions?

Absence of bias

17

Miguel only creates inventions that respect and help conserve natural resources and is an advocate against pollution and illegal logging. What scientific attitude is seen in his actions?

Concern for the environment

18

Nicolaus Copernicus believed that the church was wrong about the sun revolving around the Earth. Advancing his theory that the earth revolved around the sun eventually cost him his life. What scientific attitude is seen in his actions?

Revolutionary

19

If two variables X and Y are directly related, which of these is NOT true?

When X increases, Y decreases.

20

Read the following, then answer the questions. Beda wants to find out if different types of wood soak up the same amount of water when wet. She plans to do the following: I. Weigh a dry block of each type of wood II. Put each block into a container full of water III. Leave the wood in the water IV. Take the wood out, dry the outside of each block and reweigh. V. Calculate the amount of water soaked up. QUESTION: To be a fair test, what variables should she control? I. Size of each block II. Time left in water III. Type of wood IV. Amount of water

I and II

21

Beda wants to find out if different types of wood soak up the same amount of water when wet. She plans the steps listed. In this experiment, what is the dependent variable?

The amount of water soaked up

22

Beda's wood experiment: What is the independent variable?

Type of wood used

23

A class designed an experiment: three detergents (Tide, Surf, Champion) were tested on three different fish species kept in different sizes/shapes of bottles: tilapia + Tide, goldfish + Surf, janitor fish + Champion. What is the control group?

Cannot be determined

24

In the same detergent-fish experiment, what is the experimental group?

The baby janitor fish with 1 tbsp of Champion, The tilapia with 1 tbsp of Tide, The goldfish with 1 tbsp of Surf

25

In the detergent-fish experiment described, what is the dependent variable?

The effect of detergent on fish

26

Is there any defect in the class's experimental design (different fishes, different bottle sizes/shapes, different detergents each)?

Yes, not only one but several.

27

To improve the detergent-fish experiment they designed, which of the following should be done? I. Just focus on one dependent variable at a time. II. Use the same type and size of fish. III. Increase the number of fish and reduce the number of detergent brands involved.

I and III

28

Printed on a bottle of cough medicine: “Store away from light, below 30°C.” What can you infer about the cough medicine?

It is affected by heat and light.

29

It is commonly observed that many respondents to survey checklists just check answers without reading. What conclusion can be derived from this observation?

Data gathered by way of questionnaire checklists are not very reliable.

30

Teacher M showed potted plants on a windowsill and asked why they tended to grow outward. What was Teacher M engaging the pupils to do?

Formulate hypothesis

31

The existence of extraterrestrial life may never be proven, but this idea will become more scientifically acceptable over time if ____________.

Increasing scientific evidence supports the idea.

32

Which comes ahead in the scientific method — observation or defining the problem?

No definite answer. What you observe makes you think of a problem and a problem makes you observe.

33

You want to know how many pupils have mothers who are presently employed as OCWs. What is/are the most reliable way(s) to gather data? I. Interview the pupils. II. Give questionnaire checklist to selected pupils. III. Study the grade of the pupils because poor performance usually correlates with OCW parents.

I only

34

Which of the following has the smallest mass when measured in an equal-arm balance?

1/8 sheet of pad paper

35

Student F computes results up to the second decimal place. As a researcher or scientist, which trait(s) does Student F possess? I. Accuracy II. Critical-mindedness III. Objectivity IV. Truthfulness

I. Accuracy, IV. Truthfulness

36

Which does NOT belong? A. Conclusion B. Surmise C. Hypothesis D. Conjecture

Conclusion

37

Nancy wanted to find out if virgin coconut oil (VCO) can be used as a preservative for peanuts. She placed 10 peanuts each in 2 glasses. In one glass she added enough VCO to cover the peanuts; the other glass had no liquid. She kept both on a shelf and observed for two weeks. Which among the following statements is the best problem statement for Nancy’s experiment?

Is virgin coconut oil useful as a preservative for peanuts?

38

In Nancy's peanut/VCO experiment, which among the following is NOT a controlled variable?

Amount of virgin coconut oil.

39

From Nancy's experiment, which of the following is an observation that may derive? I. Only four peanuts dried up in the glass without virgin coconut oil because of room temperature. II. Six peanuts did not dry up in the glass with virgin coconut oil. III. The duration of 2 weeks for this experiment is too long. IV. Peanuts did not wither in virgin coconut oil because of the presence of stearic acid.

I and II

40

In Nancy’s experiment, what is the independent variable?

Presence or absence of virgin coconut oil

41

How many manipulated variables are present in this experiment?

One

42

What is a suitable null hypothesis for this experiment?

Virgin coconut oil has no significant preservative effect on peanuts.

43

During a period of increased global temperatures, which of the following is most likely to occur?

An increase in atmospheric CO2.

44

Why is the Philippines much hotter than Canada? The Philippines ________________

Receive sun rays closer to vertical position.

45

Geothermal energy, an energy resource in the country, is based on which phenomenon?

There are concentrations of heat in some places of earth’s crust.

46

Which of these effects generally occurs as a result of a warm air mass and a cooler air mass converging at Earth’s surface?

Stormy weather patterns develop.

47

Why do fisher folks catch more fish during the new moon than during the full moon?

Fishes are attracted to the light from the fishing boat which fishermen make use of during the new moon.

48

Bagoong smells because ____________.

Molecules from bagoong spread in air.

49

Every morning when the sun shines through the glass jalousies of Maria’s window, she sees a rainbow on her wall. Which could explain this?

The glass jalousies break up the beam of sunlight into the colors of the rainbow.

50

Which of the following is TRUE about light and seeing?

Light hits an object, bounces, and then enters the eyes.

51

Why do leaves with green color look green in the sunlight?

They reflect green light.

52

Why does the level of water in a beaker rise after a stone is placed in it?

The stone takes the place occupied by water.

53

Why do people feel their ears pop or crack when they are up in the air?

There are less air particles.

54

Which of the following activities help reduce water pollution?

Treating wastewater before it is discharged.

55

The manager of a textile factory considers it too expensive to treat liquid waste so he suggests digging a hole near the factory where the wastes can be stored. Is this environmentally safe?

No, the liquid wastes will seep to the groundwater.

56

Why are nights cooler when the sky is clear than when it is overcast?

There is no cloud cover to prevent heat from escaping.

57

Water covers about 75% of the Earth’s surface and yet some people still do not have enough water to drink. Which reasons are correct? I. Most of the world’s water is salty. II. Most of our bodies of water are polluted by chemicals. III. Most fresh water are frozen in ice caps.

I, II and III

58

Children born with a deficiency of thyroxin __________ if the deficiency is not checked.

Become mentally retarded

59

The correct way of eating fruits is when eaten __________.

With an empty stomach

60

An eclipse of the sun throws the shadow of the __________.

Moon on the earth

61

The following are effects of global warming EXCEPT __________.

Thinning of the ozone layer

62

John experienced a lack of growth hormone (GH) as a child. Now that John is an adult, it is likely that he __________.

Has normal adult body proportions, but an extremely short stature

63

Which among the following represents the smallest unit of life?

Cell

64

Which of the following statements about living things is FALSE?

All living things have a nervous system

65

Which of the following best describes a group of cells that work together to perform a function?

Tissue

66

Which among the following are duplicated during the process of mitosis?

Chromosomes

67

Plants create their own food by absorbing and processing sunlight. The ability to produce one’s own food source is a metabolic process known as __________.

Autotrophy

68

Fungi absorb nutrients from dead organisms. In an ecosystem, what role do they play?

Saprophytes (decomposers)

69

Which among the following cell organelles does NOT participate in cellular division?

Ribosomes

70

Which of the following is an example of a symbiotic relationship?

Weeds clinging to the roots of trees in your backyard

71

Which of the following is NOT an example of a naturally occurring sugar?

Mitose

72

Which of the following is the proper example of natural selection?

Albino rodents die off quickly in a community, being more vulnerable to certain diseases

73

What is the main difference between prokaryotes and eukaryotes?

The eukaryote has a nucleus, but the prokaryote does not

74

Which of the following statements is TRUE about parasites and their relationships with their hosts?

The parasite enjoys the benefits of a relationship in which the host is harmed or killed

75

Vascular tissue that transports water in leaves connects directly to which of the following?

Xylem in the stem

76

One immediate cause of a decrease in the rate of photosynthesis is a reduction in the availability of which substance?

Carbon dioxide

77

Which type of digestion occurs in the mouth when an individual chews a piece of bread?

Both mechanical and chemical digestion

78

Which among the following gases is green in color?

Chlorine

79

What does a pH below 7 indicate?

Acidity

80

Which of the following best describes the amount of energy required to remove an electron from a gaseous atom?

Ionization energy

81

Which among the following has the most polar bond?

HF

82

A molecule or an ion is classified as a Lewis base if it has which of the following properties?

Donates pair of electrons

83

Which among the following elements can be drawn into thin wires and hammered into thin sheets?

Cu

84

Alchemists in ancient Egypt tested gold for purity by remelting it and heating it; if the gold became whiter, it contained _____.

Silver

85

Salts of which of the following metals are added to fireworks to make them brilliant red?

Strontium

86

What intermolecular forces do geckos and other lizards use to stick to walls and ceilings?

Van der Waals forces

87

If no more solute can be dissolved in a solvent at a given temperature, then that solution is called _____.

Saturated

88

A horizontal row of elements on the Periodic Table is known as a(n) _____.

Period or Series

89

According to the modern periodic table law, the chemical properties of the elements are periodic functions of their _____.

Atomic number

90

The amount of substance having 6.02 x 10^23 of any kind of chemical unit is called a(n) _____.

Mole

91

Breaking up a solid speeds dissolving in a liquid by _____.

Increasing surface area

92

Fats do not dissolve in water because fats _____.

are nonpolar and water is polar

93

What is the location on the Earth's surface that is directly above the place where an earthquake originates?

Epicenter

94

If there are several earthquakes in a row, what is the name of the largest of these earthquakes?

Mainshock

95

What is the partially molten layer of the Earth called?

Asthenosphere

96

What part of Earth is thought to be composed of iron and nickel?

Core

97

What is the numerical value for the hardest mineral on the Mohs hardness scale?

10

98

Which among the following properties is a measure of how easily a mineral can be scratched?

Hardness

99

Rock fragments thrown into the air during a volcanic eruption are called _____.

Tephra

100

What is a pyroclastic flow?

A mixture of volcanic gas, ash and other tephra