Structure of the Earth/Density Test
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- Betty Poole
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1 Name Score /69 Structure of the Earth/Density Test Using the formula for density: to solve each problem, SHOWING ALL YOUR WORK, including UNITS. Refer to this chart to answer questions #1 & #2 Layer Approximate Density Water 1.0 g/ cm 3 Crust g/ cm 3 Mantle g/ cm 3 Outer Core g/ cm 3 Inner Core g/ cm 3 1. You have a rock that has a mass of 14 g and a volume of 4.8 cm 3. What layer of the earth did this rock most likely come from? (2 points) 2. You are given a tube filled with a core sample taken from deep in the earth. You take out a sample from about halfway through the core. You find its mass is 47 g and its volume is 4.5 cm 3. What layer of the earth did this sample most likely come from? (2 points) 3. You have a rock. You are to determine its density. When weighed, its mass is 114g. You place it in a graduated cylinder that has water up to the 100 ml level. After the object is submerged, the water level raises to the 124 ml level. What is the object s density? (2 points) [1]
2 Use the chart to answer question #4 & #5 Metal Approximate Density Gold g/cm 3 Copper 8.96 g/cm 3 Silver g/cm 3 Platinum g/cm 3 Iron 7.0 g/cm 3 4. You are given a sample of an unknown metal. You determine its mass is 217 g and its volume is cm 3. Which metal were you given? (2 points) 5. A meteorite lands in your backyard. You want to determine what metal is in the meteorite. Its mass is 364 g and its volume is 52 cm 3. What metal makes up most of the meteorite? (2 points) 6. Godzilla was running wild in Brigham City, trying to eat the town. The Police finally capture him. He is finally captured. The Police Department needs to know his density for a report. They tell you his mass is 8,000kg and his volume is 4,117cm 3. What is Godzilla s density? (2 points) 7. Determine if the object will float, sink, or do neither in the fluid. (6 points) Density of Fluid Density of Object Sink, Float, or Neither? 5.42 g/cm g/cm g/cm g/cm g/cm g/cm g/cm 3.99 g/cm g/cm g/cm g/cm g/cm 3 [2]
3 8. You have a cup. You put some dirt in the cup and shake it. It sits for three days. In the area below, draw how the dirt would layer. (Use the key to fill in the cup). (8 points) Dirt 2.3 g/cm 3 A. Rocks 5.8 g/cm 3 B. Small pebbles 3 g/cm 3 C. Water 1 g/cm 3 D. 9. Calculate the density of a 500 g rectangular block with the following dimensions: length=8 cm, width=6 cm, height=5 cm. (2 points) 10. Why does the atmosphere of the Earth float above the planet s surface? a. The atmosphere has a higher density than the planet. b. The atmosphere has a lower density than the planet. c. The atmosphere formed before the planet did. d. The atmosphere formed after the planet did. 11. Water has a density of 1.0 g/ml. You are given a rock with a density of 2.5 g/ml. Predict what will happen to the rock when put into a container of water. a. The rock will sink to the bottom of the water. b. The rock will float on top of the water. c. The rock will sink half way to the bottom of the water. d. The rock will float just below the surface of the water. [3]
4 12. Label the correct layers of the Earth based on its density. (8 points) A. B. C. D. Crust 3 g/cm 3 ; Inner Core 15 g/cm 3 ; Mantle 4 g/cm 3 ; Outer Core 12 g/cm Which answer shows the following items in order from the highest density to the lowest density? a. Water, atmosphere, core, crust c. Crust, water, atmosphere, core b. Atmosphere, crust, core, water d, Core, crust, water, atmosphere 14. 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. 15. 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. [4]
5 16. Label the correct layers of the Earth s atmosphere based on its density. (8 points) Exosphere A. Ionosphere B. C. D. Mesosphere g/cm 3 ; Stratosphere g/cm 3 ; Thermosphere g/cm 3 ; Troposphere.001 g/cm Which of the following statements best explains why earth is layered in the following order: air water crust core? a. Things in nature like to order themselves by color, red to the bottom and blue to the top. b. Things in nature like to order themselves by density, most dense to the bottom and least dense to the top. c. Things in nature like to order themselves by particle size, largest particles to the bottom and smallest particles to the top. d. Things in nature like to order themselves by temperature, hottest to the bottom and coolest to the top. [5]
6 18. Pat is given the following items: a rock, sand, water, and metal bar. Pat calculates the density of each object. The results are shown below: Rock = 3.2 g/ml Sand = 1.9 g/ml Water = 1.0g/mL Piece of metal = 6.5 g/ml Pat then puts all of the items into a jar and shakes it up. Pat lets the jar settle for 5 minutes, What would be the expected order of the items going from the top of the container to the bottom? a. Rock, sand, water, metal b. Metal, rock, sand, water c. Water, sand, rock, metal d. Sand, metal, water, rock You are given the following materials and their densities and then asked to construct a model of the earth consisting of a core, mantle, crust, water, and air. Cotton Glue clay Aluminum foil A Nickel 0.2 g/ml 1.0 g/ml 1.8 g/ml 2.4 g/ml 4.6 g/ml 19. Based on density, which material would be the best choice to represent the core of the Earth? a. Cotton c. Aluminum Foil b. Clay d. nickel 20. Based on density, which material would be the best choice to represent the crust of the Earth? a. Cotton c. Aluminum Foil b. Clay d. nickel 21. Water has a density of 1 gram/ml. There are four rocks that all have the same volume of 5 cubic centimeters. The mass for each of these rocks is given below. Which one of the four rocks will float when placed in water? a. 15 grams c. 6 grams b. 10 grams d. 4 grams [6]
7 22. The diagram above represents a model of the Earth. Is this a good model? a. Yes, it shows the layers of the Earth and features on its surface. b. No. The Earth has four layers. c. No. The mountains aren t to scale. d. BOTH b & c. 23. You are given an unknown object. You find its mass to be 28g. You find its volume to be 10 ml. Using the chart below, determine which layer of the Earth the object would belong to based on its density. Sample Earth density chart: Layer Water Crust Mantle Outer Core Inner Core Approximate Density 1.0 g/ml g/ml g/ml g/ml g/ml Which layer of the Earth would the unknown object belong to based on its density? a. Crust c. Outer Core b. Mantle d. Inner Core 24. A rock and a lead weight both sink when dropped into a lake. What do you know about their densities? a. They have the same density. c. They are denser than water. b. They have different densities. d. They are less dense than water.. [7]
8 25. Put the following items into a test tube, shake it up, and predict the outcome of your investigation. Earth materials: air, gravel, water, sand and gold dust. a. From bottom to top: gravel, gold dust, sand, water, air. b. From bottom to top: gold dust, gravel, sand, water, air. c. From top to bottom: air, water, gold dust, sand, gravel. d. From bottom to top: water mixed in with layered gravel, sand, and gold dust, with air above the mixture. Use this data to answer questions #26 & #27: Substance Density Oil.8 g/ml Water 1.0 g/ml Plastic.9 g/ cm 3 Rock 4.2 g/ cm 3 Aluminum 2.3 g/ cm When mixed, shaken, and left to settle, what would be the order of the substances starting from the bottom and going up? a. Rock, aluminum, plastic, water, oil c. Rock, plastic, oil, water, aluminum b. Rock, aluminum, water, plastic, oil d. Rock, oil, aluminum, plastic, water 27. Where would a substance with a mass of 14 g and a volume of 20 ml float? a. At the bottom c. At the top b. In the middle d. Below the water 28. A balloon filled with helium rises into the air. Why? a. The balloon is larger than air. c. The helium is less dense than air. b. The balloon is heavier than air. d. The helium is denser than air. 29. Water has a density of 1 g/ml. What density might a typical rock be? a..005 g/cm 3 c. 5 g/cm 3 b..5 g/cm 3 d. 50 g/cm A streambed contains round rocks, all about the same size. Why are there no smaller particles of sand and clay? Sand and clay a. is denser. c. were never there. b. have washed away. d. are too small to see. [8]
9 31. Salad dressing separates into two layers. Oil is on the top and vinegar is on the bottom. When will the vinegar be on the top layer? a. When there is more oil than vinegar. c. When they are added in different order. b. When there is more vinegar than oil. d. Never, under normal conditions. 32. A beach is composed of particles of sand of the same size. Why doesn t the beach have materials of all sizes? The particles have a. come from the same place. c. been found in underwater canyons. b. come to the beach at the same time. d. been sorted by size and density. 33. A road cut reveals layers in the soil. Why does soil have layers? a. It has been sorted by particle size and density. b. It is made from rock and other particles. c. It was placed in layers by humans. d. The layers have always been there. 34. During a flash flood, large boulders can be moved downstream. Why don t large boulders usually move? a. They are made from very dense materials. b. They are too heavy. c. They are attached to the stream bottom. d. They are weathered and eroded in place. 35. A student was given an assignment to calculate the density of a rock. Which of the following would best describe one of the needed steps to calculating the rock s density? a. The student puts the rock in an empty graduated cylinder and records the measurement in milliliters. b. The student puts the rock in a graduated cylinder filled with water and records the volume of the rock. c. The student uses a thermometer to measure the temperature of the rock in Celsius degrees. d. The student measures the length of the rock in centimeters with a metric ruler. 36. A student collected data about the density of air. She found that.1 g of air had a volume of 100 cm 3. What is the density of the air? a..001 g/ cm 3 c..1 g/cm 3 b..01 g/cm 3 d. 1.0 g/cm 3 [9]
10 [10]
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