Air Masses and Weather

What are air masses?

• medium volume of air in which temperature and moisture content are nearly the same throughout

• small volumes of air in which temperature and moisture content are nearly the same throughout

• large volumes of air in which temperature and moisture content are nearly the same throughout

• large volumes of air in which wind and rain content are nearly the same throughout

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

When do air masses form?

• when the snow over a large region of Earth stays in one area for many days and drops the temperature and humidity of the land or water below it

• when the rain over a large region of Earth stays in one area for many days and causes flooding and humidity of the land or water below it

• when the air over a large region of Earth stays in one area for many days and takes on the temperature and humidity of the land or water below it

• when the cloud over a large region of Earth stays in one area for many days and starts raining and humidity rises

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

What happens when two air masses meet?

• density differences usually keep them from mixing. A boundary forms between the air masses called a front.

• density usually mixes them. A boundary forms between the air masses called a front.

• density is the same and usually keeps them from causing bad weather. A boundary cannot form between the air masses that is called a front.

• density keeps them from separating. A boundary forms between the air masses called a front.

Tags

NGSS.MS-ESS2-5

How do the different kinds of fronts form?

• it depends on how these rain masses move relative to each other, and on their relative strength and moisture content

• it depends on how these air masses move close to each other, and on their relative strength and moisture content

• it depends on how these air masses move relative to each other, and on their relative temperature and moisture content

• it depends on the temperature and moisture content and the sunlight and type of clouds

Tags

NGSS.MS-ESS2-5

Fronts result ...

• in a change in wind as they pass.

• in a change in temperature as they pass.

• in a change in clouds as they pass.

• in a change in weather as they pass.

Tags

NGSS.MS-ESS2-5

Air masses that form above land are ...

• moist

• dry

• hot

• cold

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Air masses that form above water are ...

• moist

• dry

• hot

• cold

Tags

NGSS.MS-ESS2-5

Where do cold fronts form?

• where cold air moves ABOVE warm air

• where cold air moves BESIDE warm air

• where cold air moves UNDER warm air

• where cold air moves INSIDE warm air

Tags

NGSS.MS-ESS2-5

What kind of weather can occur with cold fronts

• light rain or snow can occur if enough moisture is present. Cooler weather will follow.

• no rain or snow can occur if enough moisture is present. Warmer weather will follow.

• sunlight can occur if enough moisture is present. Warmer weather will follow.

• heavy rain or snow can occur if enough moisture is present. Cooler weather will follow.

Tags

NGSS.MS-ESS2-5

The picture is an example of ...

• cold front

• warm front

• stationary front

Tags

NGSS.MS-ESS2-5