Science Q3T3: Question Preview (ID: 23812)


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Where is Earth's atmosphere most dense?
a) at its bottom
b) at its top
c) on a mountaintop
d) at the heights jets fly

What happens to most visible light when it enters the atmosphere?
a) It is emitted
b) It is absorbed
c) It is reflected
d) It passes through

Earth's atmosphere is mostly
a) oxygen and hydrogen
b) nitrogen and water vapor
c) oxygen and carbon dioxide
d) nitrogen and oxygen

Waves of _____ radiation have more energy than waves of radiation that you can see
a) ultraviolet
b) infrared
c) greenhouse
d) visible

Which of these is a sudden event that can change Earth's atmosphere?
a) a rainstorm in a mountainous area
b) the eruption of a very large volcano
c) the release of oxygen by plants
d) the decay of animals after they die

Which of the following is true?
a) Greenhouse gases absorb and give off ultraviolet radiation
b) Greenhouse gases absorb and give off infrared radiation
c) Greenhouse gases screen out radiation and keeps earth's surface from heating up
d) Greenhouse gases speed up the release of radiation from earth to outer space

Ozone is a molecule that is
a) made of three atoms of the element oxygen
b) made mostly of carbon dioxide and water
c) found mostly throughout the troposphere
d) mainly responsible for the greenhouse effect

Which of these statements is true?
a) Air density is the same at all altitudes.
b) Air is more dense at high altitudes.
c) Air is less dense at high altitudes.
d) Air is less dense at low altitudes.

What are the two most common gases in air?
a) nitrogen and oxygen
b) oxygen and hydrogen
c) argon and carbon dioxide
d) oxygen and water vapor

Which of these statements is true?
a) About half of the Sun's energy is absorbed by Earth's surface
b) About half of the Sun's energy is reflected by Earth's surface
c) About half of the Sun's energy is reflected by clouds and the atmosphere
d) About half of the Sun's energy is absorbed by clouds and the atmosphere

Which part of the atmosphere contains a type of gas that absorbs UV radiation?
a) troposphere
b) stratosphere
c) mesosphere
d) thermosphere

Most visible light that enters the atmosphere
a) is absorbed
b) is reflected
c) emits radiation
d) passes through

Which is not an air pollutant?
a) smog
b) oxygen
c) ozone
d) pollen

Which of these will help reduce greenhouse gases?
a) driving everywhere
b) cutting down forests
c) living in houses that use less energy
d) using more fossil fuels to power cars

Which layer of Earth's atmosphere contains a gas that absorbs ultraviolet radiation?
a) troposphere
b) mesophere
c) thermosphere
d) stratosphere

Which of these best describes the greenhouse effect?
a) the absorption and emission of infrared radiation by gasses in the air
b) the absorption and emission of ultraviolet radiation by gases in the air
c) the absorption and emission of infrared radiation by clouds
d) the absorption and emission of ultraviolet radiation by clouds

What is conduction?
a) the transfer of energy as a result of direct contact of matter
b) the transfer of energy by a gas or a liquid in motion
c) the transfer of energy in a cycle across a distance
d) the transfer of energy in the form of certain waves

Air pollutants can
a) add important gases to the air
b) decrease greenhouse gases
c) harm humans, plants, and other living things
d) increase the amount of ozone in the stratosphere

Which layer of Earth's atmosphere protects organisms from harmful ultraviolet radiation?
a) troposphere
b) mesophere
c) thermosphere
d) stratosphere

Which of these reflects the most solar radiation?
a) greenhouse gases
b) the mesosphere
c) ozone
d) clouds

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