Air pressure, masses, fronts, and storms

What is air pressure?

• The measure of the force with which air molecules push on a surface

• The temperature of air at different heights

Answer explanation

Air pressure is the measure of the force with which air molecules push on a surface.

Tags

NGSS.MS-ESS2-5

Where is air pressure greatest?

• At the surface of the Earth

• At high altitudes

Answer explanation

Air pressure is greatest at the surface of the Earth due to the weight of the air above pressing down on it.

When the pressure is increased from low to high, the arrangement of molecules in a container (a)   .

• The molecules get more closely pack

• The molecules turn into a different

Answer explanation

When the pressure is increased from low to high, the arrangement of molecules in a container gets more closely packed, leading to a higher density of molecules.

What type of weather is typically associated with low pressure systems?

• Snowy and cold weather

• Lousy and cloudy weather

Answer explanation

Low pressure systems are typically associated with lousy and cloudy weather.

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

What type of weather is typically associated with high pressure systems?

• Dry and fair weather

• Rainy and stormy weather

Answer explanation

High pressure systems are typically associated with dry and fair weather, making the correct answer choice 'Dry and fair weather'.

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

What happens to the air pressure when the air is warm?

• Air pressure decreases

• Air pressure increases

Answer explanation

When the air is warm, it expands and becomes less dense, leading to a decrease in air pressure.

Tags

NGSS.MS-ESS2-6

How do the molecules in cold air behave compared to those in warm air?

• They move slower and are more spread out

• They move slower and are closer together

Answer explanation

In cold air, molecules move slower and are closer together, leading to a denser arrangement compared to warm air.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which statement is true about the density of warm air compared to cold air?

• The density of air does not depend on temperature

• Warm air is less dense than cold air

Answer explanation

Warm air is less dense than cold air, as warm air molecules are more spread out compared to cold air, leading to lower density.

Based on the concept of land and sea breezes, in which direction is the air likely to move if the temperature over the land is 80 degrees Fahrenheit and over the sea is 70 degrees Fahrenheit?

• No movement of air

• From the sea to the land

Answer explanation

Based on the concept of land and sea breezes, when the land is warmer than the sea, the air moves from the sea to the land, making the correct answer 'From the sea to the land'.

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

What causes mountain breezes to flow downhill at night?

• Cold air sinking and moving down the mountain slopes

• Strong winds from the valley pushing air uphill

Answer explanation

Cold air sinking and moving down the mountain slopes causes mountain breezes to flow downhill at night.

Tags

NGSS.MS-ESS2-5