Question

food color is dropped into water to give it color. chewing food to break it down into smaller particles represents a physical change, but the changing of starch into sugars by enzymes in the digestive system represents a chemical change. in a fireworks show, the fireworks explode giving off heat and light. 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 this statement is False.
3. Evaporation is when liquid water changes to gas, which is True.
4. Evaporation is a physical change as only the state of matter changes, so it's True.
5. Burning wood forms new substances like ash and gases, so it's a chemical change, and this statement is False.
6. Combining hydrogen and oxygen to make water is a chemical reaction forming a new substance, so it's False.
7. Breaking up concrete only changes its physical form, no new substances are formed, so it's True.
8. Sand being washed out to sea is a physical movement, no chemical change occurs, so it's False.
9. Ice - cream melting is a physical change as only the state changes, so it's False.
10. Acid rain reacting with marble is a chemical change as it forms new substances, 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