Question

1 all of the following are phases (states) of matter except: a solid b liquid c gas d putty 2 this matter has a fixed shape and volume with particles closely packed together with little movement. it is a: a liquid b solid c gas d plasma 3 matter changing from a solid to a liquid is called: a evaporation b sublimation c deposition d melting 4 the melting point of water is: a 0°c b 100°c c 32°c d 60°c 5 water is different from other substances because: a it is more dense as a solid than a liquid b it is less dense as a solid than liquid c it is more dense as a gas than a liquid d it is less dense as a solid than a gas 6 which of the following substances has a higher melting point than water? a salt b sugar c flour d all of the above 7 which of the following is not a way that matter changes phase? a melting b freezing c evaporation d mixing 8 matter changing from a solid to a gas is called: a evaporation b sublimation c deposition d melting

Explanation:

1. The three common phases of matter are solid, liquid, and gas. Putty is not a phase of matter.
2. Solids have a fixed shape and volume with closely - packed particles and little movement.
3. The process of a solid changing to a liquid is called melting.
4. The melting point of water is 0°C.
5. Water is unique because it is less dense as a solid (ice) than as a liquid.
6. Salt, sugar, and flour generally have higher melting points than water.
7. Mixing is not a phase - change process. Melting, freezing, and evaporation are phase - change processes.
8. The process of a solid changing directly to a gas is called sublimation.

Answer:

1. D. putty
2. B. solid
3. D. melting
4. A. 0°C
5. B. It is less dense as a solid than liquid
6. D. all of the above
7. D. mixing
8. B. sublimation