Vocabulary Words

3. principle-In science, buoyancy is an upward force exerted by a fluid that opposes the weight of an immersed object.
7. molecule-which the centroid of the positive charges is different from the centroid of the negative charges
9. an area or ridge of land that separates waters flowing to different rivers, basins, or seas.
10. tension-the tension of the surface film of a liquid caused by the attraction of the particles in the surface layer by the bulk of the liquid, which tends to minimize surface area
12. the ability or tendency to float in water or air or some other fluid.
14. a large natural or artificial lake used as a source of water supply
15. the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water
17. the action or process of precipitating a substance from a solution
21. the degree of compactness of a substance
24. a liquid mixture in which the minor component (the solute) is uniformly distributed within the major component (the solvent)
25. action-a manifestation of surface tension by which the portion of the surface of a liquid coming in contact

1. the action or fact of forming a united whole.
2. separate or be separated into parts
4. water that collects as droplets on a cold surface when humid air is in contact with it.
5. heat-the heat required to raise the temperature of the unit mass of a given substance by a given amount
6. cycle-the cycle of processes by which water circulates between the earth's oceans, atmosphere, and land, involving precipitation as rain and snow, drainage in streams and rivers, and return to the atmosphere by evaporation and transpiration.
8. water underground water that is held in the soil and in previous rocks
11. excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen
13. action or process of adhering to a surface or object.
16. all the waters on the earth's surface, such as lakes and seas, and sometimes including water over the earth's surface, such as clouds.
18. to change state from a liquid to a gas or vapor
19. a river or stream flowing into a larger river or lake
20. a substance that provides nourishment essential for growth and the maintenance of life.
22. force-an upward force that is caused by the pressure of fluids.
23. the natural home or environment of an animal, plant, or other organism.