Science Chapter 7 Grade 7 Flashcards

What type of weather does a cold front bring?

short periods of heavy rains and thunderstorms

What type of weather does a warm front bring?

gentle rains over large areas that last a long time

What happens to the warm air mass in a occluded front?

gets trapped between 2 colder air masses.

What happens during a stationary front?

cold air and warm air meets, but remains seperated because there isn’t enough wind

What are 3 things needed for a thunderstorm to form?

Moisture, Unstable Air, Lift (warm air)

What is a weather front?

boundary between air masses of different temperatures and densities

What are 4 hazards a severe thunderstorm can produce?

High winds, Flash floods, Tornadoes, Hail

What are 2 impacts of lightning?

Starting thousands of forest fires each year, and killing/injuring hundreds of people per year in the United States

4 reasons why the Earth’s temperature is not consistent across the world.

Angle of incidence, Altitude, Water and land, Albedo (color of surface)

What are seasons caused by?

tilt of the earth’s axis in relation to its path/orbit around the sun

When is it winter in the Northern Hemisphere?

When the sun’s rays strike the surface of the Earth at 90 degrees to the Tropic of Capricorn

When is it summer in the Northern Hemisphere?

When the sun’s rays strike the surface of the Earth at 90 degrees to the