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slow breaking down of rocks into smaller pieces
weathering
process of wearing away earth materials by water, wind, or ice (it makes a physical change)
erosion
the process by which rocks, sand, and sediment are deposited by the forces of erosion
deposition
happens when compounds from burning coal, oil, and gas react chemically with water and forms acid
acid rain
materials deposited by some natural process
sediment
weathering in which rocks are physically broken into pieces (this is also called physical weathering)
mechanical weathering
weathering in which rocks and minerals are dissolved
chemical weathering
a piece of land shaped like a triangle that is formed when a river splits into smaller rivers before it flows into an ocean
delta
a deep valley with steep rock sides and often a stream or river flowing through it
canyon
a long wall of soil built along a river to prevent flooding
levee
a very large area of ice that moves slowly down a slope or valley or over a wide area of land
glacier
a hole or tunnel in the ground that an animal (such as a rabbit or fox) makes to live in or for safety
burrow
give an example of mechanical weathering
ice freezing and expanding in cracks in the rock
when water comes in contact with granite. Feldspar crystals inside the granite react chemically forming clay minerals
chemical weathering
