6th Grade unit 1 semester 2

______ is the most abundant gas in Earth’s atmosphere.

Which term best completes the sentence?

• oxygen

• nitrogen

• carbon dioxide

• methane

Which layer of the atmosphere has the most air pressure?

• exosphere

• stratosphere

• troposphere

• mesosphere

Which statement best describes heating by conduction?

• Air molecules touch the warm ground, heating them up.

• Warm air rises and takes heat with it; eventually it cools and sinks.

• Sunlight travels through space without the aid of fluids or solids.

• Air at the equator rises and sinks at the poles.

Which statement best explains heating by convection?

• Air molecules touch the warm ground, heating them up.

• Warm air rises and takes heat with it; eventually it cools and sinks.

• Sunlight travels through space without the aid of fluids or solids.

• Land and ocean absorb and re-emit heat from the sun.

Which statement best describes the relationship between changes in air pressure and wind speeds?

• When a high- and a low-pressure air mass are far apart, air moves quickly from low to high pressure.

• When a high- and a low-pressure air mass are far apart, air moves slowly from high to low pressure.

• When a high- and a low-pressure air mass are close together, air moves slowly from high to low pressure.

• When a high- and a low-pressure air mass are far apart, air moves quickly from high to low pressure.

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NGSS.MS-ESS2-5

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Which conditions are usually the effect of a low air pressure system?

• clear, dry weather

• cloudy, wet weather

• cold, dry weather

• hot, dry weather

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NGSS.MS-ESS2-5

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What do high pressure systems usually cause?

• clear, dry weather

• cloudy, wet weather

• cold, wet weather

• hot and humid weather

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NGSS.MS-ESS2-5

What would cause rain showers to continue over a particular area for several days?

• a high-pressure system

• a stationary front

• low humidity

• a warm front

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NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Which effect does an ocean have on the climate?

• Rushing water from tides cools the land.

• There is no influence on climate from an ocean.

• Cool ocean air causes a cool climate.

• Warm ocean air causes a dry climate.

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NGSS.MS-ESS2-6

Which effect can an ocean have on the climate?

• Rushing water from tides cools the land.

• There is no influence on climate from an ocean.

• Ocean winds can carry moisture with them and can bring rain and fog over inland areas.

• Warm ocean air causes a dry climate.

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NGSS.MS-ESS2-6