1. Science
Study Guide
Chapter 13

2. A mixture it made up of different substances that are combined physically but not chemically.
The substances that make up a solution mix together at the molecular level.

3. The measure of how much of one substance can be dissolved in another substance is called solubility.
In the solution of alcohol and iodine, the iodine is the solute.

4. In the solution of alcohol and iodine, the alcohol is the solvent.
A chemical property is the ability of a material to change its chemical makeup.

5. The ratio of mass to volume is called density.
The temperature at which a solid changes to a liquid is called melting point.
Boiling point is the temperature at which a liquid changes to a gas.

6. Heat changes an egg that is fried in a pan because heat causes chemical reactions and chemical changes in the egg.

7. When chemical reactions occur, matter is conserved.
Matter is not destroyed.
Matter changes into other kinds of matter, but the total mass of all matter remains the same.

8. When a light bulb is wired to a battery this forms a circuit.
The physical property of the wire in the circuit allows energy to flow from the battery to the light bulb.
Conductivity allows energy to flow through the circuit.

9. Electrical wires are covered with rubber because rubber is an insulator.
It covers metal wires for safety reasons.