Across
- 4. _____________________weathering-chemical effects of water, carbon dioxide, and oxygen attacking and destroying the minerals that are near the surface of the Earth
- 6. can cause weathering along a shoreline
- 9. the movement of weathered rocks by natural forces
- 10. the natural features of the Earth's surface
- 11. __________________ weathering-any of the destructive effects of the atmosphere and the exposure of rocks to the extremes of the surface
- 13. ice _______________ - a collective term for several mechanical weathering processes induced by stresses created by the freezing of water into ice
- 14. one rock bumping against another rock
- 15. this erosion takes place when minerals in the rock form a new solution, usually due to the presence of water
- 16. beings do a lot of mechanical weathering whenever they dig or blast into rock
- 18. example of a man-made object that has been changed by weathering
Down
- 1. physical weathering is a naturally or artificially occurring geological phenomenon in which ________ change their physical properties without affecting their chemical composition
- 2. _________ rain - acid precipitation falling as rain
- 3. ___________ are responsible for the physical weathering of rocks as their roots grow up through the surface of the ground and rock face
- 5. when carbon dioxide is present and carried by water, a weak acid called carbonic acid is created
- 7. as rocks weather and erode, the ___________ eventually becomes rock again--a sedimentary rock
- 8. when liquid water changes into solid ice, it increases in __________
- 12. ____________________ are also responsible for a good deal of physical weathering as the move along the rocky surface, and as they freeze and melt and refreeze on top of rocky soil
- 13. _______________________ rates - a measurement of the amount of weathering over a given time period
- 17. the absorption by a mineral of one or more oxygen ions. The major type of chemical weathering, particularly in rocks containing iron