Question 2(multiple choice worth 3 points)
(01.04 lc)
which of the following properties is the temperature at which a liquid turns to gas?
magnetism
thermal conductivity
melting point
boiling point
question 3(multiple choice worth 3 points)
(01.04 lc)
complete this sentence. the solubility of a sample will when the size of the sample increases.
stay the same
decrease
increase
be unable to be determined
question 4(multiple choice worth 4 points)
(01.04 mc)
which of the following reasons explains why some cooking pots are made of metal, but their handles are made of wood?
both wood and metal have low thermal conductivity.
both wood and metal have high thermal conductivity.
wood has low thermal conductivity, and metal has high thermal conductivity.
wood has high thermal conductivity, and metal has low thermal conductivity.
question 5(multiple choice worth 4 points)
(01.04 mc)
lisa had 20 grams of water. she poured out 15 grams. which of the following physical properties of the water changes?
boiling point
density
electrical conductivity
volume
question 6(multiple choice worth 3 points)
(01.04 lc)
a substance used to dissolve other substances is which of the following?
saturation
solubility
solute
solvent

Explanation:

1. Boiling point

The boiling point of a substance especially a fluid, is that temperature at which it turns from liquid to gas. The boiling point of water for example is 100°C, at this temperature, liquid water changes to vapor which a gaseous form of water.

2. decrease

When the size of a sample increases, the surface area of the sample decreases and so also the solubility. Smaller sized samples have a large surface area through which the solvent can readily surround and dissolve a material. Larger sized particles on the other hand have low surface area and dissolves slowly than expected.

3. Wood has low thermal conductivity, and metal has high thermal conductivity.

The thermal conductivity of wood is very low while that of metals is very high. This why metals will conduct heat away from a heat source and a wood will remain unchanged in terms of temperature.

4. Volume

Volume is an extensive property of a matter that depends on the amount of substance present. Volume is the amount of space a substance occupies. The more the substance, the more the space it occupies. This why 20g of water will have a higher volume compared to 15g of water.

5. Solvent

A solvent is a liquid that dissolves other substances. When solvents dissolves other substances, they form a solution.