Science Chapter 3 Test Guide

Multiple Choice: The Earth's ____________________ is the envelope of gases that surrounds the planet. A. Gas B. Water Vapor C. Particles D. Atmosphere

D. Atmosphere

When the air pressure increases, does it press down more or less on the surface of the mercury?

More.

Why does the clear daytime sky look blue?

Scattered light looks bluer than ordinary sunlight.

If the percentage of oxygen in the air at the top of the mountain is the same as at the bottom, why is it harder to breath?

The air is less dense- each cubic meter of air you breathe has fewer oxygen molecules

Dust-size particles and gases in the atmosphere disperse light in all directions, a process called ____________

scattering

Gases in the atmosphere hold heat in the Earth's atmosphere in process called _____________

the greenhouse effect

Multiple Choice At its shallowest layer, the troposphere is most ________. A. Dense B. Pressure C. Changing D. Volume

A. Dense

As air pressure decrease, does density increase or decrease?

It decreases.

How does energy travel to Earth?

It travels to Earth as electromagnetic waves.

Ultraviolet radiation has a shorter wavelength than infrared radiation.

True.

The troposphere is thinner above the North and South poles than above the equator.

True. It is 16 km thick above the equator and 9 km thick above the North and South poles.

Multiple Choice __________ is a unit of air pressure. A. Millibars B. Millimeters C. Millipressure D. Millisphere

A. Millibars

Electromagnetic waves are classified according to: A. Wavelength B. Volume C. Mass D. Density

A. Wavelength

Multiple Choice: _____ is the condition of the earth's atmosphere. A. Weather B. Climate C. Temperature D. Energy

A. Weather

Some sunlight is _______________ by the atmosphere before it can reach the surface. A. absorbed and reflected B. penetrated and reflected C. absorbed and emitted D isolated and reflected

A. absorbed and reflected

What types of barometers are there?

Aneroid and mecury

Multiple Choice Half of the gas in the atmosphere i s found in the bottom ____ kilometers. A. 10 B. 5.5 C 6.5 D 4

B. 5.5

Multiple Choice: _________ is the result of weight of a column of air pushing on an area. A. Gravity B. Air Pressure C. Density Altitude

B. Air Pressure

The mesosphere protects us from: A. Visible radiation B. Meteoroids C. Ultraviolet Radiation C. Aliens

B. Meteoroids

Multiple Choice Which portion of the stratosphere has more ozone than the rest of the atmosphere? A. The lower portion B. The middle portion C. The upper portion

B. The middle portion

Multiple Choice In the upper mesosphere, temperatures reach: A. -120°C B. -80°C C. -90°C D. -100°C

C, -90°C

Multiple Choice The air contains what percent of oxygen? A. 33% B. 19% C. 21% D. 25%

C. 21%

Ultraviolet radiation can cause: A. Sunstroke B. Sunscreens C. Sunburns D. Sunflowers

C. Sunburns

What percent of the energy that reaches Earth surface is absorbed by land and water and changed into heat? A. 75% B. 60% C. 25% D. 50%

D. 50%

Multiple Choice Air pressure and temperature change with ________ A. Gravity B. Water Vapors C. Density D. Altitude

D. Altitude

Multiple Choice: Density is the amount of mass in a given _______ of air is: A. Length B. Pressure C. Weight D. Volume

D. Volume

True or False: A barometer is an instrument that is used to measure density.

False. A barometer is an instrument that is used to measure air pressure.

True of False: The air is dry.

False. Air contains water vapor.

Red and orange light have the shortest wavelength.

False. Blue and violet light have the shortest wavelength.

Earth's surface radiates some energy back into the atmosphere as ultraviolet radiation.

False. Earth's surface radiates some energy back into the atmosphere as infrared radiation.

The troposphere contains the ozone layer.

False. The stratosphere contains the ozone.

True of False: Mass is the amount of space that matter occupies.

False. Volume is the mater of space that matter occupies.

True or False: The blanket of gases that makes up Earth's atmosphere is thick.

False: Earth's atmosphere extends far out into space.

True or False: Altitude is the distance from the ground.

False: It's the distance from sea level.

True or False: The most abundant gas in the atmosphere is the gas called, OXYGEN.

False: NITROGEN

True or False: The remain gases of "other gases" are called "TRACK GAS."

False: TRACE GAS

True or False: "CARBON DIOXIDE" makes up much less than 1%of the atmosphere, but is essential to life.

True

True or False: Without "OXYGEN" a fire will go out.

True

The thermosphere has no definite outer limit

True.

True or False: Altitude affects density.

True.

What are the two layers in the thermosphere?

ionosphere and exosphere

The ______ _______ protects us from uv radiation.

ozone layer

What are the for main layers of atmosphere?

the troposphere, the stratosphere, the mesosphere and the thermosphere