Question

1. color is what type of property? a) physical b) chemical 2. reactivity is what type of property? a) chemical b) physical 3. what is a sign of a physical change? a) stretching b) color changing c) bubbles forming d) producing heat

Explanation:

1. Color can be observed without changing the substance's chemical composition, so it is a physical property.
2. Reactivity involves how a substance interacts chemically with other substances, so it is a chemical property.
3. Stretching is a physical change as it only alters the shape of a substance without changing its chemical identity. Color - changing, bubbles - forming, and producing heat are often signs of chemical changes.

Answer:

1. a) Physical
2. a) Chemical
3. a) Stretching