1. Density of Earth Quiz

2. Question 1 An egg sinks in water but floats in salt water. What do you know about the density of the egg? a. It is more dense than water but less dense than salt water. b. It is less dense than water and less dense than salt water c. It is denser than water and denser than salt water. d. It is less dense than water but more dense than salt water.

3. Question 2 A student shakes a jar with a mixture of sand types. Instead of mixing, the sand grains separate into layers. Why? a. The grains are different colors. b. The grains have different shapes. c. The grains have different densities. d. The jar has a round shape.

4. Question 3 Why is water located above the crust but below the air? a. The density of water is higher than air and higher than the crust b. The density of water is lower than air and higher than the crust. c. The density of water is higher than air and lower than the crust. d. The density of water is lower than air and lower than the crust.

5. Question 4 Why are iron and nickel found in Earth’s core? a. They have a higher density than most of Earth’s substances. b. They have a lower density than most of Earth’s substances. c. The core is hotter than the other layers of the earth. d. The core is colder than the other layers of the earth.

6. Question 5 Where is the most dense layer of the atmosphere located? a. b. c. d. The atmosphere does not have layers

7. Question 6 Why have scientists concluded that the core of the earth is a solid? a.Mathematics show that the temperature is so high that it must be a solid. b.X-rays cannot penetrate the core, so it must be a solid. c.Seismic waves bounce off of the core, so it must be a solid. d.Satellite images taken of the core show that it is a solid.

8. Question 7 Why are relief globes such as this one inaccurate? a.The continents are out of proportion. b.The mountains are too tall compared to the circumference of the earth. c.The tectonic plates are not shown. d. Looks good to me!

9. Question 8 Scrat finds an acorn with a mass of 28 grams and a volume of 7 cc. What will happen if the acorn rolls down a glacier and into the lake? a.The acorn will sink because it is hotter than the lake water. b.The acorn will sink because it is more dense than the lake water. c.The acorn will float because it is less dense than the lake water. d.The acorn will float because it does in the movie.

10. Question 9 What happens to the spacing of particles of air moving from outer space to the troposphere (close to the earth.) ? a.The particles move farther apart because the temperature increases. b.The particles move farther apart because the force of gravity increases. c.The particles move closer together because the force of gravity increases. d.It is impossible to move from outer space toward the earth unless you are an alien.

11. Question 10 a.The particles sorted according to shape. b.The particles sorted according to particle size c.The particles sorted according to density. d.Both b and c are correct If earth materials are placed into a jar, shaken, and allowed to sit, the jar looks like this. Why did the particles form layers?