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Unit 6 Exam

Last updated over 5 years ago

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Answer the questions by clicking on the correct answer. You will have ONE class period in which to complete this exam.

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Do NOT forget to turn in this assignment on Google Classroom after you have submitted it here. No credit will be awarded for unsubmitted assignments.

Auroras are caused by electrically charged particles in the 

A. mesosphere.

B. troposphere.

C. hemisphere.

D. ionosphere.

How much energy radiated by the sun reaches Earth?

A. about 80%

B. about 50%

C. about two-billionths

D. about one one-hundredth

Energy transferred as electromagnetic waves is called

A. thermal conduction.

B. radiation.

C. convection.

D. convection current.

Thermal energy transferred by circulation of a liquid or gas is called

A. thermal conduction.

B. radiation.

C. convection.

D. convection current.

The process by which gases in the atmosphere absorb thermal energy and radiate it back to Earth is called

A. the thermal effect.

B. the greenhouse effect.

C. global warming.

D. radiation balance.

What causes wind?

A. differences in air pressure

B. differences in gravity

C. differences in oxygen

D. differences in the thermosphere

What causes differences in air pressure around the Earth?

A. Warm air rises at the Equator and cold air sinks at the poles.

B. Warm air sinks at the Equator and cold air rises at the poles.

C. Warm air rises at the Equator and cold air rises at the poles.

D. Cold air rises at the Equator and warm air sinks at the poles.

Global winds that blow from west to east are called

A. polar easterlies.

B. westerlies.

C. mountain breezes.

D. trade winds.

Narrow belts of wind that can reach 400 km/h are called

A. jet currents.

B. jet streams.

C. convection currents.

D. convection streams.

Carbon dioxide, dust and smoke from forest fires that are put directly into the air are called

A. smog.

B. primary pollutants.

C. secondary pollutants.

D. killer fog.

Which of the following is a secondary pollutant?

A. carbon monoxide

B. chemicals from paint

C. ozone

D. vehicle exhaust

Air temperature changes as altitude increases because of

A. gases that absorb solar energy.

B. gravity's pull on oxygen.

C. air pollution.

D. air pressure.

Radiation is the transfer of energy

A. as electromagnetic waves.

B. by circulation of gases.

C. from atmospheric gases.

D. as heat through a material.

Thermal conduction is the transfer of energy

A. by the circulation of gases or liquids.

B. as electromagnetic waves.

C. as heat through a material.

D. to the atmosphere.

Convection is the transfer of energy

A. by the circulation of gases or liquids.

B. as electromagnetic waves.

C. as heat through a material.

D. to the atmosphere.

Winds that blow from 30o to 60o latitude in both hemispheres are called

A. westerlies.

B. polar easterlies.

C. trade winds.

D. the doldrums.

Winds that blow from the poles to 60o latitude in both hemispheres are called

A. westerlies.

B. polar easterlies.

C. trade winds.

D. the doldrums.

Which is an example of a primary pollutant?

A. ozone

B. sea salt

C. acid rain

D. smog

What is the greatest problem created by the ozone hole?

A. It allows more UV rays to reach the Earth's atmosphere.

B. It allows more UV rays to reach the Earth's surface.

C. It allows more UV rays to escape Earth's atmosphere.

D. It does not allow enough UV rays to reach the Earth's surface.

A vehicle that runs on both electricity and gasoline is called a 

A. catalytic converter.

B. hybrid car.

C. hydrogen car.

D. low emission car.

Wind occurs because air tends to move from regions of higher to lower

A. latitude.

B. pressure.

C. temperature.

D. humidity.

Air pressure decreases as what increases?

A. altitude

B. radiation

C. water vapor

D. pollution

What is the atmosphere that surrounds Earth made of?

A. water vapor

B. carbon dioxide

C. a mixture of gases

D. oxygen

What is rain, sleet or snow that has lots of acid in it called?

A. acid shock

B. acid precipitation

C. acid etching

D. acid wash

What is the main problem caused by the ozone hole?

A. Too much radiation escapes Earth.

B. Too much radiation reaches Earth.

C. Too little radiation reaches Earth.

D. Too little radiation escapes Earth.

What explains the fact that a pan on a stove gets hot when it is above a flame?

A. radiation

B. thermal conduction

C. convection

D. greenhouse effect

Which of the following shows the composition of Earth's atmosphere?

A. nitrogen: 68%; oxygen: 21%; other gases: 11%

B. nitrogen: 78%; oxygen: 11%; other gases: 11%

C. nitrogen: 78%; oxygen: 21%; other gases: 1%

D. nitrogen: 98%; oxygen: 1%; other gases: 1%

Which is an example of a local wind?

A. polar easterlies

B. trade winds

C. jet streams

D. sea breezes

How much of the sun's energy is scattered and reflected by clouds and air?

A. 5%

B. 20%

C. 25%

D. 50%

Which of the following is a primary pollutant?

A. carbon monoxide

B. ozone

C. smog

D. water vapor

What generally causes differences in air pressure on Earth?

A. wind patterns

B. unequal heating of the planet

C. the shape of the planet

D. denser air near the Equator

What role does runoff play in the water cycle?

A. It is the process in which liquid water turns to water vapor.

B. It carries water from precipitation into oceans.

C. It takes water out of the water cycle.

D. It is not part of the water cycle.

What happens when air reaches its dew point?

A. Condensation occurs.

B. Relative humidity is 100%.

C. The humidity decreases.

D. Clouds form.

Which of the following describes an air mass with the symbol cT?

A. cold and wet

B. cold and dry

C. warm and wet

D. warm and dry

How do winds behave in a cyclone?

A. they spiral toward the center.

B. They spiral out toward low pressure areas.

C. They are very calm.

D. They travel in two different directions.

What kind of weather would an anticyclone likely bring?

A. stormy

B. cool and wet

C. dry and clear

D. changable

The most powerful storms on earth are

A. tornadoes.

B. thunderstorms.

C. hurricanes.

D. hailstorms.

What kind of weather would a cumulonimbus clouds likely bring?

A. clear and sunny

B. hurricane

C. light rain

D. thunderstorm

A tornado is dangerous mostly because of its

A. heavy rains.

B. lightning.

C. strong winds.

D. storm surge.

Finding a high place to wait is a safety measure during a 

A. thunderstorm.

B. tornado.

C. hurricane.

D. flash flood.

Which information can you get from a weather map?

A. a 5 day weather forecast

B. wind speeds and directions

C. the locations of cold fronts

D. barometric pressure

Isobars help meteorologists by

A. creating an image of weather systems.

B. showing what form precipitation will take.

C. measuring wind speeds.

D. showing high and low pressure areas.

Lightning is an electric discharge between a positively charged area and

A. a rising air mass.

B. a source region.

C. another positively charged area.

D. a negatively charged area.

A maritime polar air mass that forms over the North Pacific Ocean brings what kind of weather to the Pacific Coast?

A. warm

B. dry

C. wet

D. extremely cold

A windsock does NOT

A. consist of a cone shaped bag.

B. measure wind speed.

C. measure wind direction.

D. allow wind to pass through it.

Isobars indicate

A. air pressure.

B. rainfall.

C. snow.

D. wind speed.

What causes changes in weather?

A. Air masses move and meet.

B. The air gets more humid.

C. Water evaporates.

D. Clouds form.

How does a hurricane begin?

A. with big cean waves

B. with high winds on land

C. with rain inpolar areas

D. with thunderstorms over the ocean

What causes lightning?

A. thunder

B. an electric discharge

C. rising warm air

D. air masses meeting

What tool measures air pressure?

A. thermometer

B. psychrometer

C. anemometer

D. barometer

What is a cloud made of?

A. water droplets

B. gases

C. rain or snow

D. warm air

Which of the following is the cause of the change of seasons?

A. the distance of a place from the Equator

B. prevailing winds blowing across land or water

C. the tilt of the Earth's axis

D. the rotation of the Earth

Prevailing winds that travel to a region across a large body of water would probably make the region's climate

A. warmer.

B. wetter.

C. cooler.

D. drier.

What causes soil in rain forests to be nutrient poor?

A. Plants and animals decay rapidly.

B. There are not enough decaying plants and animals.

C. Many trees have above ground roots that do not nourish soil.

D. Nutrients are quickly used by plants or washed away.

Which of the following describes soils in deciduous forests?

A. most fertile soil of all biomes

B. rocky and nutrient poor

C. not fertile because of high acid content

D. fertile because of many decaying leaves

What causes the big temperature change from day to night in the temperate desert?

A. frequent evening precipitation

B. high elevation

C. little solar energy during the day

D. low humidity and clear skies

Which of the following is NOT a cause of an increase in carbon dioxide in the atmosphere?

A. burning fossil fuels

B. clearing forests for farming

C. using automobiles

D. planting trees

Which of the following biomes is always warm and wet?

A. tropical rain forest

B. temperate forest

C. savanna

D. chaparral

Prevailing winds affect a region's climate by

A. creating desert areas.

B. causing more precipitation on one side of a mountain.

C. affecting how much precipitation it receives.

D. controlling the amount of solar energy it receives.

Which human activity is NOT thought to be related to global warming?

A. burning forests for farm land

B. riding a bike

C. burning fossil fuels for transportation

D. cutting down trees for building materials

The main reason that winter is colder in Washington, D.C. than in southern Texas is that

A. Washington is located at a high elevation.

B. Washington is at a higher latitude.

C. the prevailing winds in Texas travel across water.

D. southern Texas has many mountains.

What does the geologic record indicate about the Earth's climate?

A. It has always been about the same.

B. It is at its coldest now.

C. There has been one major ice age.

D. It was once much colder than it is today.

An important factor for plant growth in the tropical savanna is

A. grass fires.

B. year round rain.

C. cold nigfhts.

D. rapid decay of plants.

Why does the Equator experience about the same temperatures year round?

A. It tilts toward the sun and gets much more direct solar energy.

B. It has no prevailing winds.

C. It has no mountains to affect its climate.

D. The sun's rays strike the Equator at about the same angle all year.

Which of the following is an example of a microclimate?

A. the polar zone

B. the rainforest

C. the savanna

D. the alpine biome

The Milankovitch theory explains

A. why the Earth's axis tilts.

B. how an asteroid could change climate.

C. what causes ice ages.

D. why the Earth's climate never changes.

If an asteriod of 1 km or larger hit the Earth,

A. plants and animals would not be affected.

B. the Earth's temperature would rise.

C. the Earth's temperature would lower.

D. climate would not change but weather would.

Wind will generally carry the most moisture when it comes from

A. warm grasslands.

B. warm tropical seas.

C. polar icecaps.

D. mountainous regions.

The most abundant plants in the taiga are

A. deciduous trees.

B. evergreen shrubs.

C. bamboo.

D. conifers.

Which human activity is thought to be most responsible for global warming?

A. using aerosol hairspray

B. mowing grasslands for cattle feed

C. burning fossil fuels for transportation

D. planting deciduous forests for building materials

Seasons are caused by

A. the sun's cycle.

B. the greenhouse effect.

C. sunspots.

D. the tilt of the Earth's axis.

How do prevailing winds that travel across large bodies of water affect the climate?

A. They make it colder.

B. They make it warmer.

C. They make it wetter.

D. They make it drier.

What helps plants grow in the tropical savanna?

A. grass fires

B. rain all year

C. cold nights

D. the quick rotting of plants

Which of the following helps conifers grow well in the taiga biome?

A. acid in the soil

B. branches that shed snow

C. losing leaves each year

D. roots above the ground

Which of the following is a microclimate?

A. the polar zone

B. the rain forest

C. the savavva

D. a mountain