ISBS pg. 50, #1-12

1. Physical properties are properties that can be observed and measured without changing the chemical makeup of the substance. 

2.  The physical properties of water include density and the freezing, melting, and boiling points of water.

3. Solid water is not nearly as dense as liquid water. For example: ice floats to the top of a cup of liquid water because it is not as dense.

4. A situation in which you may observe water as a solid, liquid, and gas at once would be You might observe water as a solid, liquid, and a gas at the same time when you are by a frozen pond. While the pond is made up of liquid water, the top layer would be frozen. When the water is frozen, it releases liquid in the form of gas up into the air.

5. A heterogeneous mixture is a mixture that is not uniform throughout, while a homogeneous mixture is uniform throughout and evenly distributed. 

6. It's important to know the densities of each material; whichever has the lower amount of density will rise to the top.

7. 

a. Suspension

b. Suspension 

c. Colloid

d. Solution 

e. Suspension 

f.  Colloid 

8. Similar to the Tyndall Effect, the beam of light passing into the room shows that there are small particles present in the air; thus, the air in the room is a colloid because there are small solid particles which are too tiny to filter through any process.

9. 

10. Also like the Tyndall effect, this red liquid is a colloid. Due to the fact that no particles sank to the bottom, it is not possible for the liquid to be a suspension.

11. A substance has a uniform/definite composition and distinct properties. For example: elements and compounds.

12. 

a. Compound

b. Element

c. Compound

d. Element 

e. Compound 

f.. Compound

g. Compound