Unit 3-4 Review Test Write answers only on a slice of paper. Particle Motion/Density/Earth Structure Write answers only on a slice of paper.

1- A rock dropped into a graduated cylinder raises the level of water from 9 mL to 12 mL. The rock has a mass of 9.8 g. What is the density of the rock?

2- If a marshmallow peep starts as a big bunny shape, then is squished into a tiny ball, what change happens to the peep? The volume of the peep increases. The density of the peep increases. The mass of the peep increases

3- Which of these boxes is more dense? Box A is more dense because it has more volume than B. Box A is more dense because it has more mass than B. Box B is more dense because it has particles more spread out than A. Box B is more dense because it has more mass than A.

4- A chunk of metal is dropped into the liquids shown below 4- A chunk of metal is dropped into the liquids shown below. The metal comes to rest between liquid B and liquid C. What do you know for sure about the metal? The metal is aluminum because it is very light. The metal has a density less than 1.21 g/mL and greater than water. The metal has a density of 1.21 g/mL The metal is not a pure substance.

5- When Bob dropped a banana into milk to make a smoothie, the banana moved to the bottom of the blender. What inference is best supported by this evidence? The banana sinks because it is a solid, and the milk is liquid. The banana sinks because it is room temperature and the milk is chilled. The banana sinks because it is more dense than the milk. The banana sinks because it is heavier than the milk.

6- A hiker in Zion National Park comes across a wash 6- A hiker in Zion National Park comes across a wash. The bottom is covered in large, smooth rocks, but there is no sand visible. What inference can the hiker make based on this evidence? a. The water was flowing quickly at this point and the sand washed away. b. The water was flowing slowly at this point and the sand soaked into the rocks. c. The water was flowing quickly at this point and the sand dissolved. d. The water was flowing slowly at this point and the sand was covered with larger rocks.

7- Why might our model of Earth change in the future? Scientists will want to make the structure more interesting. The structure of Earth will change over time. Technology will provide additional information about the structure of Earth. Scientists will discover information about Earth on the Internet.

8- Bob notices construction workers cutting ”grooves” in a new sidewalk. He also notices that an old section of sidewalk without grooves is buckled and cracked. Why? Expansion Contraction Increase in mass

9- What will happen when a cell which is 65% water is placed into a beaker of sugar water that is 85% water? The cell will shrivel because water will move out of the cell. The cell will shrivel because water will move into the cell. The cell will plump because water will move into the cell. The cell will plump because sugar will move into the cell.

10- Why does the density of a liquid decrease if the liquid is heated? The particles of liquid get closer together as heat is added, so mass increases. The particles of liquid spread apart as heat is added, so volume decreases. The particles of liquid spread apart as heat is added, so volume increases.

11- The nails that fasten siding to a building are often left “loose 11- The nails that fasten siding to a building are often left “loose.” Why? Siding will expand when hot and buckle if the nails are too tight. Siding will freeze and break in the winter if the nails are too tight. Siding will rust around the nails if they are too tightly fastened.

12- Which of these scenarios would make “skunk stink” particles diffuse the fastest? A skunk was hit on the road during a snowstorm in January. A skunk was hit on the road during the middle of a hot, July day. A skunk was hit on the road during a rainstorm in March. A skunk was hit on the road during the night in October.

13- Which of the following are evidence that particles move from high concentration to low concentration? Mark all which are true. a. A student barfs in the hallway and eventually the smell can be detected in the classroom. b. A few drops of Pepsi are added to a glass of Mtn. Dew and the entire glass turns brownish. c. Dust from the baseball field eventually covers the football field.

14- Students mixed sand, gravel, clay, and humus in a jar with water, shook the jar, then let it settle. The jar looks like this after a few minutes. Why did gravel settle first? Gravel has the smallest particle size. Gravel has the largest particle size. Gravel contains the most silicon. Gravel contains the least silicon.

15- How are the materials making up the solid core different from those of the solid crust? Crust rock is harder than core rock. Crust rock is solid while core rock is not. Crust rock will dissolve in water. Crust rock is less dense than core rock.