Crossword

1. Where life operates
5. anything that takes up space and has mass.
7. and the solution of the environmental problems.
9. focuses on the Earth’s atmosphere and its interrelation to the other system
11. is the outer mantle of the solid earth.
14. comprises all types of water resources oceans, seas, lakes,rivers, streams,reservoir, polar icecaps, glaciers,and ground water.
16. The study of the interactions between life and its physical environment
17. Stored energy that depends upon the relative position of various parts of a system.
20. The study of interactions among physical, chemical, and biological components of the
21. It is needed by all known forms of life.

2. Developing new knowledge based upon old knowledge.
3. earth sciences, especially geology.
4. is the rate at which energy is used
6. the protective blanket of gases (N, O2, Ar, CO2, trace gases), surrounding the Earth
8. is the study of energy
10. is the ability to do work
12. A solution with a pH higher than 7.
13. is the energy that it possesses due to its motion.
15. produced when a rise in temperature causes atoms and molecules to move faster and collide with each other
18. the protective blanket of gases (N, O2, Ar, CO2, trace gases), surrounding the Earth
19. is done when force is applied to an object over a distance