Question

1. which type of mixture has particles that settle over time? a. solution b. suspension c. colloid d. compound 8. what is the upward force that fluids exert on objects called? a. pressure b. density c. viscosity d. buoyancy 9. which best describes a compound? a. a pure substance made of one type of atom b. a mixture of different elements c. a pure substance made of different elements chemically combined d. a mixture of compounds 10. what happens during the heat of fusion? a. a liquid changes to a gas b. a solid changes to a liquid c. a gas changes to a liquid d. a solid changes to a gas 11. which is a characteristic of a colloid? a. particles settle quickly b. particles scatter light c. particles are visible to naked eye d. particles dissolve completely

Explanation:

1. In a suspension, particles are large enough to settle over time due to gravity.
2. Buoyancy is the upward - force exerted by fluids on objects.
3. A compound is a pure substance made of different elements chemically combined.
4. Heat of fusion is the heat required for a solid to change to a liquid.
5. One of the key characteristics of a colloid is that its particles scatter light (Tyndall effect).

Answer:

1. b. Suspension
2. d. Buoyancy
3. c. A pure substance made of different elements chemically combined
4. b. A solid changes to a liquid
5. b. Particles scatter light