Science Bonus

2. This is the acquisition or gradual gathering of something.
4. A process of wearing or being worn by long exposure to the atmosphere.
6. Is the microscopic organism, especially a bacterium, virus, or fungus.
9. This is the action of deposing someone, especially a monarch.
11. A low area of land between hills or mountains, sometimes with a stream through it.
13. The measure of the void spaces in a material is called what?
14. This is a thorough or dramatic change in form or appearance.
15. The supply of water to land or crops to help growth, typically be means of channels.

1. The drain away from soil, ash, or similar material by the action of percolating liquid, especially rainwater.
3. This is the action or process of adding something to something else.
5. This is the upper layer of earth where plants grow, consisting of a mixture of organic remains, clay, and rock
7. The action or fact of making a specified thing smaller or less in amount, degree, or size.
8. This is a mark with spots or smears of color
10. The arrangement of the natural and artificial physical features of an area.
12. The process of eroding or being eroded by wind, water, or other natural agents is called what?