Crossword Puzzle - Jaewoo Park

2. Small water droplets that is near the ground.
4. The transfer of the heat energy through direct physical contact
6. The second layer of the Earth’s atmosphere. There is an ozone layer that protects us from the harmful UV rays from the sun. Without it, life would be dangerous.
8. This happens when warmer air go inside to the colder air.
10. All water in the Earth such as ocean, river, and lake.
12. The outside layer of Earth’s atmosphere. There is almost no air. That’s the reason why satellites orbit here.
14. The solid part that include interior and exterior of the Earth.
16. Water that from the rain, snow, sleet, and hail.
19. The thing that is deliberately changed or manipulated in an experiment to observe its effect on another variable. It's the "cause" in a cause-and-effect relationship.
20. The day that have same time of day and night
21. All community living things on Earth.
22. A large body of air with same temperature and humidity
23. The lowest layer of Earth’s atmosphere. Weather happens there such as clouds, rain, snow, stroms, and wind.

1. Temperature that dew happen
3. This happens when cold air mass go into to the warm air mass
5. The thing that changes as a result of the independent variable manipulation.
7. A variable that is kept “constant” or unchanged during an experiment to ensure that the results are not influenced by factors other than the independent variable being tested.
9. The fourth layer of Earth’s atmosphere.It’s very hot. Aurora happen in thermosphere.
11. This happens when warmer air go inside to the colder air.
13. A type of heat transfer that happens through water and air
15. Weight of the air in atmosphere
17. The third layer of Earth’s atmosphere. Meteors burn up here. That’s the reason they don’t reach Earth.
18. The Layer of gases that surrounding Earth or another planets such as Mars and Venus