問題一覧
1
The color of an object we see is determined by the object
. All of the above
2
Which has the greatest energy among the colors in a rainbow?
violet
3
The following statements are milated to the frequency and wavelength of visible light Which of the statements ive TRUE
Red light has the shortest wavelength arhinog waible
4
Why is it not advised to stay under the sun after 9:00 in the morning?
Because the UV rays are strongest beyond 9:00 a.m.
5
. Which of the following statement about the color of light is correct?
. Violet has the shortest wavelength and highest frequency
6
Which of the following combination of color for visible light is correct?
. Red+green Yellow
7
What will happen if an object releases heat?
. The temperature of the object is lower
8
How does heat differ from temperature?
. Heat is the transfer of thermal energy from one object to another, while temperature refers to the degree of coldness or hotness of an object,
9
If you submerge a metal spoon in boiling water, how does energy flow?
. Energy flows from the boiling water to the metal spoon.
10
Walking on the hot sand with your bare feet is an example of what type of heat transfer?
Conduction
11
. How does convection occur?
. Convection happens when there is a difference in temperature both in liquid and gas
12
The following are examples of convection heat transfer EXCEPT
Heating a porn on a stove
13
. Which of the following statement correctly describes hest tronafer by radiation?
B. Heat transfer by radiation occurs when microwaves Vifrared rudiation, saible light, or another form of electroeisgnetic radiation is emitted for absorbed
14
. What will be the charge of an atom after it gains an additional electron?
. Negative
15
Each particle of an atom has specific charge. Which is INCORRECTLY paired?
. Protons: negatively charge; Electrons positively charge
16
Refer to the picture below if balloon B is negatively charge and is attracted to balloon?
. Positively charged
17
What do you call the process of transferring charges between objects by rubbing?
changing by friction
18
. Aki rubs a comb on her dry hair, giving the hair a negative charge. Which is most likely to happen?
. Electrons are added to the hair
19
What do you call the process of charging a conductor by bringing it near another charged object?
Induction
20
Which statement is true about an object in motion?
. It is the change in object position with respect to a reference point
21
Which statement describes an object in constant motion?
. The earth's rotation around the sun.
22
How does distance differ from displacement?
Distance has magnitude only, while displacement has magnitude and direction
23
Refer to the figure below, when a body moves along a rectangular path 'ABCDA' and reaches point 'A' again what will happen to its distance and displacement?
The distance will double, and the displacement will become zero
24
For question no 5 refer to the table below. Data were obtained from a 100 meter das competition Male Athlete Recorded Female Which of the following statements is/are true? I. The female athletes are as fast as the male athletes II. The female athletes are faster than the male athletes III. The fastest athlete has a recorded time of 13.25 seconds IV. Compared to the speed of the fastest female athlete, the average speed of the fastest male athlete is slightly less
. II and IV only
25
Which of-the-following statement about speed and velocity is NOT TRUE?
The speed and velocity of a moving object are always equal
26
,A weather forecaster reported that a typhoon heading northwest is moving at 115 kilometers per hour Which of the following describes the velocity of the typhoon?
. 115 km/h Northwest
27
An athlete runs the 400-meter dash in 40 seconds. What is his/ her average speed?
10m/s
28
When does acceleration take place?
. When an object in motion changes its velocity.
29
Which of the following is a situation that shows acceleration?
A boy running at a constant speed in a changing direction.
30
A car starting from rest reaches a velocity of 20m / s in 3.0 seconds. Calculate the car's acceleration.
.6.67 m/s²
31
Matt and Lucas ride their bicycles to school. Both starts from rest, Lucas after 5 seconds obtain an acceleration of 2m/s while Matt also after 5 seconds reach the final velocity of 8m/s. Which of the following statements is/are TRUE about the acceleration of the two bicycles?
. Lucas bicycle accelerates faster than Matt's.
32
Which of the following is a safety tip on the road while riding a bicycle?
. Obeying traffic rules
33
What should you do if you're riding a jeepney and its speed is changing gradually?
Hold on to the railing and keep yourself alert
34
When looking at a displacement-time graph, what variable should be plotted on the y- axis and x-axis?
. X-axis: Time; Y-axis: Displacement
35
On a distance-time graph what does a horizontal line mean?
. The object is not moving
36
Joy, Ann, Mia, and Adam were asked by their teacher to draw a speed-time graph showing that an object is moving at a constant speed. The following illustrations bellow show their speed-time graphs. Who do you think among the four students got the correct answer?
Joy is correct because a straight line going to the left indicates that the speed is the same over time.
37
Dipping a finger in a pail of water results in the formation of a wave, when a paper boat is placed on top of the water, the paper boat moves up and down. This shows that_____
Wave carries energy.
38
What type of wave is produced in which the medium's vibration is parallel to the direction of the wave?
. Longitudinal wave
39
Which statement describes a wavelength?
It is the distance between two successive crests.
40
The amplitude of a wave is directly related to its energy. Which of the following correctly describes the relationship between amplitude and energy?
. The higher the amplitude, the greater the energy it carries.
41
Which of-the-following statement best describes the characteristic of sound? Statement I: Amplitude focuses on the loudness and intensity of sound Statement II. Frequency talks about the range of vibrations occurring in sound
. Both statements and are TRUE.
42
Which of the following statements are TRUE about the speed of sound? I The speed of sound may vary in each material. II The speed of sound depends in one material III. The speed of sound changes as it passes through different media IV. The speed of sound is constant as it passes through different media
. I and III only
43
Sound wave travels fastest in solids and slowest in gas. Which at the following is the correct arrangement of media based on decreasing speed?
Wood, Tap water, and Air
44
The highness or lowness of sound is called pitch. Some sounds are low, and others are high. The pitch varies directly with the frequency. What does this mean?
The higher the frequency of sound waves, the higher the pitch