general science test

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問題一覧

Which of the following best describes the difference between eukaryotic and prokaryotic cells?.

prokaryotic cells do not have nuclei

Which of the following is a terrestrial planet?

mars

When a skydiver jumps from a plane, she eventually reaches a maximum falling velocity of -56 m/s. After opening up her parachute, her falling velocity decreases to about -11 m/s. What effect on her motion does the skydiver’s parachute have?

the parachute applies a positive acceleration on the skydiver.

A freight elevator is used to lift loads of 12,000 N at a velocity distance of 250m. The elevator takes 10 s to make this trip. Assuming no energy loss, what is the average power expenditure of the elevator, when working.?

300,000w

The air in the troposphere is made up primarily of?.

nitrogen

The cell membrane that surrounds an animal cell is a.?

semi-permeable structure

At which levle of the atmosphere does all weather take place?.

troposphere

Which of the following is not true about the element hydrogen? (H)

it is a noble (inert) gas and rarely reacts

Which of the following activities results in a chemical change?

burning pieces of wood

Airflow in the stratosphere is primarily?

Horizontal

Iron is a mineral that is vital to red blood cell development. Foods that are good sources of iron include?

meats, beans and whole grains

If a pencil is placed in a clear glass of water and viewed from the side, pencil will appear to bend sharply at the top of the water

refraction

Red blood cells are produced in?

bones

Which of the following is NOT an example of phase change?

fuel burning in a combustion engine

HIV (human immunodeficiency virus) is transmitted How?

by bodily fluids

The earth experiences seasonal patterns of weather because?

its orientation to the sun is tilted on it’s axis

Body function such as heart rate and digestion that takes pace without having to think about them are regulated by the ?

autonomic nervous system

Which factor is most important in determining how atoms of an element will chemically react with other atoms ?

the number of electrons in the outer shell

Our sun is classified as what type of star?

yellow dwarf

Shale and sandstone are types of what rocks?

sedimentary

A DNA (deoxyribonucleic acid) molecule is shaped like a ?

double helix

A net force of 15 N is applied to an object that’s starts at rest and acceleration to a velocity of 12 m/s in 4 seconds. What is the mass of the object?

5 Kg

A lunar eclipse is caused by what?

the earth passing between the sun and the moon

Earthquakes occur due rj the movement of the plates in the earths what?

lithosphere

Which of the following organisms has an exoskeleton?

spiders

Out lugs convey ____ to the blood cells and receive ____ and ____ from blood cells

oxygen, carbon dioxide and water

A fireplace is sealed behind a clear glass screen to prevent sparks and ashes from getting out. Nevertheless, a person sitting in front of the fireplace will be warmed by the heat of the fire primarily because some heat is till transferred by ____?

radiation

Sodium (NA), which is a group 1 of the periodic table of the elements, and chlorine (CI), which is in group 17, wil bond together to from sodium chloride (NaCI). How will this compound behave when dissolved in pure water?

the molecules will separate into positively charged sodium ion and negatively charged chlorine ions.

Meteorology is the study of what?

the atmosphere and atmospheric phenomena

Human eggs are produced in the females ____?

ovaries

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