Earth and Space

2. known as H2O
4. the flow of water from aboveground into the subsurface.
6. the flow of charge.
10. when water that falls from the clouds as rain snow hail or sleet gathers in the oceans rivers lakes and streams.
12. conversion of a substance from the liquid or solid phase into the vapour phase.
13. a secondary product derived from a production process.
15. the third planet from the sun.
17. the process by which water changes from a liquid to a gas or vapour.
18. a type of precipitation distinct from snow, hail, and freezing rain.
21. a chemical element like hydrogen or oxygen.
23. the boundless three-dimensional extent to which objects and events have relative position and direction.
25. precipitation in the form of ice crystals.
26. a chemical compound composed of one carbon and two oxygen atoms.
27. in the form of sugar
29. the invisible mixture of gases that surrounds the Earth
30. a colourless odourless tasteless gas essential to living organisms.

1. any liquid or frozen water that forms in the atmosphere and falls back to the Earth.
3. surface runoff produced from melting snow.
5. energy from sources that are naturally replenishing but flow-limited
7. the process by which plants use sunlight water and carbon dioxide to create oxygen and
8. an interval of time during which a sequence of a recurring succession of events.
9. the ability to do work
11. when there is more water than the land can absorb.
14. the exterior or upper boundary of an object or body.
16. the process where water vapour becomes liquid.
18. a portion of the electromagnetic radiation given off by the Sun.
19. a colourless odourless gas that is totally inert to other substances.
20. a type of precipitation, or water in the atmosphere.
22. liquid precipitation: water falling from the sky.
24. a colourless, odourless, tasteless gas that is the most plentiful element in Earth's atmosphere.
28. what lies above the surface of the Earth.