Question

multiple choice
the table below shows the density of some common substances. use the table to answer questions 21 through 25.

substance	density (g/cm³)	substance	density (g/cm³)
pyrite (solid)	5.02	water (liquid)	1.00
mercury (liquid)	13.55	zinc (solid)	7.13
silver (solid)	10.50	wood (oak)	0.85

1. a cube has a density of 2.7 g/cm³. what substance is the cube made of?

a. aluminum
b. ice
c. pyrite
d. wood

1. what substance has a density more than 13 times greater than water?

a. ice
b. silver
c. aluminum
d. mercury

1. why will ice float on top of liquid water?

a. ice has a lower density than water?
b. ice has a higher density than water.
c. ice is a solid.
d. ice is colder than water.

1. what is the density of oak wood?

a. 85 g/cm³
b. 5.02 g/cm³
c. 0.85 g/cm³
d. 0.93 g/cm³

1. what is the densest solid shown in the table?

a. mercury
b. silver
c. zinc
d. pyrite

Explanation:

Step1: Match density for question 21

Check table for density of 2.7 g/cm³. Aluminum has this density.

Step2: Analyze density ratio for question 22

Water density is 1.00 g/cm³. 13 times of it is 13 g/cm³. Mercury density is 13.55 g/cm³ which is more than 13 times of water's density.

Step3: Recall floating - sinking principle for question 23

Less dense substances float on more dense ones. Ice has density 0.93 g/cm³ and water has 1.00 g/cm³, so ice floats as it is less dense.

Step4: Find density of oak wood for question 24

From table, density of oak wood is 0.85 g/cm³.

Step5: Compare solid densities for question 25

Among solids (exclude mercury as it's liquid), silver has density 10.50 g/cm³, zinc has 7.13 g/cm³, pyrite has 5.02 g/cm³. Silver has the highest density among solids in the table.

Answer:

1. a. aluminum
2. d. mercury
3. a. Ice has a lower density than water
4. c. 0.85 g/cm³
5. b. silver