Copyright 2014 Science Doodles

Transcription

1 Copyright 2014 Science Doodles

2 If a scientist comes across an unknown element, could she use density to identify the element? A. Yes, because each element has a specific density. B. No, because density changes easily. C. Maybe, if she can determine the element s melting point. Which best describes displacement? A. measuring how much matter is present in a substance by using a scale B. measuring how much space matter occupies by using a graduated cylinder C. measuring how dense matter is by using the density formula Oil and vinegar salad dressings must be shaken to mix them. How is this an example of density? A. The oil and vinegar have different densities and separate. B. The oil and vinegar have the same density and separate. C. The oil and vinegar s densities keep changing. How do you calculate density? A. Divide the mass of a substance by its weight. B. Divide the length of a substance by its temperature. C. Divide the mass of a substance by its volume. Copyright 2014 Science Doodles

3 A substance has a mass of 6 grams and a volume of 3 cm 3. What is its density? A. 2 g/cm 3 B. 18 g/cm 3 C. 0.5 g/cm 3 In an oil spill, the oil floats on top of the water. This is because the oil is A. less dense than water. B. more dense than water. C. just as dense as water. Given the following information, which of the statements is true? Rock 1 6 g 3 cm 3 Rock 2 8 g 4 cm 3 Rock 3 4 g 2 cm 3 A. Rock 3 would float on water. B. Rock 2 is the most dense. C. All rocks have the same density. A substance has a density of 2.0 g/ ml. When you drop it in water, it will A. sink. B. float. C. sink at first but then float.

4 What tool would you use to measure mass? A. triple beam balance B. thermometer C. ruler In the equation D = M/V, what does the M stand for? A. milliliter B. mass C. matter What are the units for density of a liquid? A. grams per milliliter B. grams per cubic centimeter C. grams per degree Celsius A life jacket floats on water. What do you know about the life jacket? A. It is more dense than water. B. It is less dense than water. C. It is just as dense as water.

5 Only solids, not liquids, can sink or float in water. A. True B. False You can identify an element by using its density. A. True B. False A marble with a mass of 6 grams is dropped into a graduated cylinder with 30 ml of water. The water level rises to 32 ml. What is the marble s density? A. 3 g/cm 3 B. 2 g/cm 3 C. 5 g/cm 3 Two items of the same size will always have the same density. A. True B. False

6 What tool would you use to measure volume? A. thermometer B. graduated cylinder C. triple beam balance A substance has a mass of 10 grams and a volume of 5 ml. How would you determine its density? A B C. 5 x 10 A sample of 2 grams of iron will have a greater density than a sample of 1 gram of iron. A. True B. False A scientist is given a sample of metal of an unknown element. To identify the element using density, the scientist must first measure the sample s A. mass and volume. B. temperature and mass. C. conductivity and volume. Copyright 2014 Science Doodles

7 What are the units for density of a solid? A. grams per milliliter B. grams per cubic centimeter C. grams per degree Celsius A measure of how much space matter occupies A. weight B. mass C. volume A liquid has a volume of 4 ml and a mass of 12 grams. Which calculation would give the liquid s density? A B C. 12 x 4 In the equation D = M/V, what does the D stand for? A. degree B. displacement C. density

8 A scientist has a graduated cylinder with 20 ml of water in it. The scientist drops a rock into the cylinder and the water level rises to 35 ml. What is the rock s volume? A. 10 cm 3 B. 15 cm 3 C. 55 cm 3 A scientist drops a rock into a beaker of water and notes how much the water rises. The scientist is using to measure volume. A. mass B. displacement C. density Substance g/cm 3 Substance g/cm 3 Based on the density of water (1.0 g/ cm 3 ) and what sinks and floats, what could the two substances be? A. 1 - ice, 2 - iron B. 1 - gold, 2 - ping pong ball C. 1 - copper, 2 - wood A measure of how much matter is present in a substance A. mass B. volume C. density

9 Which of these substances will float on water? A. substance 1, with a mass of 5 g and a volume of 2 cm 3 B. substance 2, with a mass of 3 g and a volume of 6 cm 3 C. substance 3, with a mass of 10 g and a volume of 5 cm 3 Chemists often compare the density of substances to the density of what liquid? A. mercury B. water C. oil In the equation D = M/V, what does the V stand for? A. volume B. variable C. velocity Objects that float on water are A. less dense than water. B. more dense than water. C. just as dense as water.