Question

1. which of the following is a chemical change? a) ice melting b) water boiling c) sugar dissolving d) gasoline burning 7. solid... a) the characteristic of being capable of or producing reflection b) very spread out c) the space an object takes up d) definite shape and volume, tightly packed particles 8. liquid... a) the amount of matter in an object. b) the ability of an object to transfer heat or electricity to another object. c) a state of matter that has no definite shape but has a definite volume. takes the shape of its container d) ability of heat and electrons to travel through a substance 9. gas... a) a state of matter with no definite shape or volume, very lose particles b) definite shape and volume, tightly packed particles c) characteristics that can be observed without changing the substance d) the ability of an object to transfer heat or electricity to another object. 10. what happens to the identity of matter during a physical change? a) it is completely changed b) it changes into a different substance c) it stays the same substance d) it disappears

Explanation:

1. Chemical changes form new substances. Gasoline burning produces new substances like carbon - dioxide and water, while ice melting, water boiling, and sugar dissolving are physical changes.
2. Solids have a definite shape and volume with tightly - packed particles.
3. Liquids have no definite shape but a definite volume and take the shape of their container.
4. Gases have no definite shape or volume and have very loose particles.
5. In a physical change, the identity of matter stays the same as no new substances are formed.

Answer:

1. d) Gasoline burning
2. d) Definite shape and volume, tightly packed particles
3. c) A state of matter that has no definite shape but has a definite volume. Takes the shape of its container
4. a) A state of matter with no definite shape or volume, very loose particles
5. c) It stays the same substance