Question

part c: true (t) or false (f)

1. changing the size and shapes of pieces of wood would be a chemical change.
2. in a physical change, the makeup of matter is changed.
3. evaporation occurs when liquid water changes into a gas.
4. evaporation is a physical change.
5. burning wood is a physical change.
6. combining hydrogen and oxygen to make water is a physical change.
7. breaking up concrete is a physical change.
8. sand being washed out to sea from the beach is a chemical change.
9. when ice cream melts, a chemical change occurs.
10. acid rain damaging a marble is a chemical change.

Explanation:

Step1: Recall physical - chemical change concepts

Physical change: no new substances formed. Chemical change: new substances formed.

Step2: Analyze each statement

1. Changing wood's size/shape is physical (T). 2. Matter makeup change is chemical (F). 3. Evaporation is physical (T). 4. Burning wood is chemical (F). 5. Combining elements is chemical (F). 6. Breaking concrete is physical (T). 7. Sand being washed is physical (T). 8. Ice melting is physical (T). 9. Acid - rain damaging marble is chemical (F).

Answer:

1. T
2. F
3. T
4. F
5. F
6. T
7. T
8. T
9. F