Earth Science

2. the part of Earth from its surface to its center
5. study of materials that make up earth and the processes that form and change these materials, and the history of the planet and its life-forms since its origins
10. the frozen portion of water on Earth's surface
11. Study of objects beyond Earth's atmosphere
13. study of the interactions of humans with the enviornment
14. a testable explanation of a situation

1. factor in an experiment that can change if the independent variable is changed
3. factor that is manipulated by the experimenter in an experiment
4. study of Earth's oceans including the creatures that inhabit its waters, its physical and chemical properties, and the effects of human activities.
6. The study of the atmosphere, which is the air surrounding earth
7. all the water in Earth's oceans, lakes, seas, rivers, and glaciers plus all the water in the atmosphere
8. all of Earth's organisms and the environments in which they live
9. method used by scientists to express a number as a value between 1 and 10 multiplied by the power of 10
10. standard for comparison in an experiment
12. blanket of gases surrounding Earth that contains about 78 percent nitrogen, 21 percent oxygen, and 1 percent other gases