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 statue is a physical change.

Explanation:

1. Changing the size and shape of wood is a physical change as no new substance is formed. So it's False.
2. In a physical change, the makeup of matter remains the same. So it's False.
3. Evaporation is when liquid water turns to gas which is true.
4. Evaporation is a physical change as only the state changes. So it's True.
5. Burning wood is a chemical change as new substances like carbon - dioxide are formed. So it's False.
6. Combining hydrogen and oxygen to make water is a chemical change. So it's False.
7. Breaking up concrete is a physical change as no new substance is formed. So it's True.
8. Sand being washed out to sea is a physical change. So it's False.
9. When ice - cream melts, it's a physical change. So it's False.
10. Acid rain damaging a marble statue is a chemical change. So it's False.

Answer:

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