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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