1. Physical properties are properties that can be observed and measured without changing the chemical make-up of the substance.
2. Boiling point, freezing point, and density.
3. The density of solid water is less than the density of liquid water.
4. All three states of matter can exist if you place an ice cube in a frying pan. The solid state would me the ice, which is quickly melting into the liquid state. Once the liquid state reaches the heat of the pan it will evaporate into water vapor. Also, there are hot springs that are right next to cold snow.
There is liquid water present, as well as water vapor but the heat does not phase the snow.
5. In a heterogeneous mixture the difference substances are uniformly mixed and their individual properties are still visible. In a homogenous mixture, the substances have dissolved into one another that it appears as one, uniform liquid.
6. I would need to know which was denser, the gasoline or the water.
7. Colloid, suspension or solution:
a. Suspension.
b. Suspension
c. Colloid
d. Solution
e. Suspension
f. Colloid
8. The air would be a colloid. This is because in a solution the particles are completely dissolved and will not reflect the light. In a suspension are too large and block the light rather than reflecting the light.
9. See sketch
10. This mixture would be a colloid since the particles involved are large enough to reflect the light. However, the liquid could be a suspension if there was oil involved in which case the oil particles would float to the top instead of the bottom.
11. A material with a uniform, definite composition and distinct properties. Examples: Table salt and oxygen.
12. Element or compound:
a. Compound
b. Element
c. Compound
d. Element
e. Compound
f. Compound
g. Element
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