Question

8. What is the density of 12 mL of lead that has a mass of 135.6 g? (Knowledge) A. 11.3 g/mL B. 0.088 mL/g C. 11.3 mL/g D. 0.088 g/mL
9. What happens as a ship leaves the Atlantic Ocean and enters the St. Lawrence River? (Application) A. the ship floats higher in the more dense water of the river B. the ship floats lower in the more dense water of the river C. the ship floats higher in the less dense water of the river D. the ship floats lower in the less dense water of the river
10. Find the density of a pearl with a volume of 4.5 mL and a mass of 12.15 g. (Knowledge) A. 0.37 g/mL B. 2.7 g/mL C. 0.37 mL/g D. 2.7 mL/g
11. As you get higher in the atmosphere, the pressure: (Application) A. increases B. decreases C. stays the same D. depends on the temperature
12. According to the Particle Model of Matter, air is a more compressible fluid than a liquid, because: (Knowledge) A. air has more particles per volume B. air particles are moving at greater speeds C. liquids have more particles per volume D. liquid particles are moving at lesser speeds

Answer 1

8.) A. 11.3 g/mL

Density is mass divided by volume hence 135.5/12  and the units are g/mL for M/V

9.) D

The water goes from a high density with the salt as it can "sit" on this goes to the low density freshwater floating lower.  

10.) B

Same explanation as Q.8

11.) A

Pressure increases as you get higher

12.) NOT SURE SORRY BUT I THINK IT IS C :/