Unit 1a

4. The force of air pushing down on Earth.
5. A region located in the interior of continents that experiences large temperature differences between summer and winter.
6. A gas that traps heat in the atmosphere, such as carbon dioxide, methane, and water vapor.
7. A system scientists use to group different climates around the world based on temperature and precipitation patterns.
10. A gas made of carbon and oxygen. It comes from breathing, burning fuels, and other activities. Too much carbon dioxide makes Earth warmer.
13. the circular patterns created when warm material rises, cools, and then sinks again, causing a continuous flow. _________ Currents.
14. The height of a place above sea level.
16. A region with moderate temperatures and distinct seasons—usually warm summers and cool winters.
18. A wind that blows from land to sea at night when the land cools faster than the water.

1. A warm region near the equator that gets lots of sunlight and has high temperatures year-round.
2. Lines that measure distance north or south of the equator.
3. The process where certain gases in Earth’s atmosphere trap heat, keeping the planet warm enough for life.
8. A wind that blows from sea to land during the day when the land heats up faster than the water.
9. Day-to-day conditions like rain or sun.
11. The average weather in a place over a long time.
12. Energy from the sun.
13. Flows of water in the ocean.
15. An area that receives very little rainfall, often found in deserts or semi-deserts.
17. The coldest climate zone near the North and South Poles, with very low temperatures and ice-covered landscapes.