November 13, 2012

exercise science for 6th grade

1. Chemical weathering caused by(chemical reactions)
2. Ms.Choir wants to bring heat water. She wants the water to stay heat, what will she bring?(thermos)
3. A chemical substance that is prohibited from being used as a food preservative is formalin
4.The wall of our house can be damaged by(moss)
5.The wind,water and sunlight are some factors that can cause ( physical ) weathering
6.The object around us can undergo a change that is caused by (decomposition)
7. The decomposition by fungi and bacteria will cause food to (rot)
8. An chemical weathering can damaged buildings in a wide area is (acid rain)
9. Biological weathering can caused by (living organism)
10.Small animals that can decay wood are (terminates)

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