(1) a piece of clear glass (2) a snowball
(3) a shiny mirror
(4) a black sweater
10. During which phase change is heat energy absorbed by a substance? *
1 point
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1) liquid to gas
(2) gas to solid
(3) liquid to solid
(4) gas to liquid
11. Which example best demonstrates the process of conduction? *
1 point
(1) A piece of paper is torn in half.
(2) Warmed air rises above a lit candle.
(3) A metal spoon gets warm when used to stir hot soup.
(4) Sunlight brightens a dark room.
12. The diagram below shows a Bunsen burner heating a beaker of water on a beaker stand. The arrows represent the transfer of heat energy in the water. Which process is primarily responsible for the transfer of heat indicated by the arrows in the beaker of water? *
1 point
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1) conduction
(2) convection
(3) radiation
(4) condensation
13. The graph below shows the heating curve for substance X. At approximately which temperature does a phase change begin? *
1 point
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(1) −30°C
(2) −10°C
(3) 0°C
(4) 18°C
14. In a convection current, hot air will rise because it is *
1 point
(1) less dense
(2) more dense
(3) cooler
(4) a better insulator
15. Energy from the Sun reaches Earth mainly by the process of *
1 point
(1) conduction
(2) convection
(3) reflection
(4) radiation
16. The diagram below shows a model of a sample of gas particles at room temperature. Which diagram best shows the results of removing heat from this sample until it freezes? *
1 point
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Option 1

Option 2

Option 3

Option 4
17. The illustration below shows a solid metal ball and a ring before and after heat is applied to the metal ball. Before heat is applied, the metal ball passes easily through the ring. After heat is applied, the metal ball does not pass through the ring. Why does this occur? *
1 point
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The heat causes a chemical change and makes the particles in the ball contract.
The heat causes a physical change and makes the particles in the ball contract.
The heat causes a physical change and makes the particles in the ball expand.
The heat causes a chemical change and makes the particles in the ball expand.
18. Ice changes to liquid water during which process? *
1 point
(1) dissolving
(2) melting
(3) evaporation
(4) condensation
19. The diagram below shows two insulated Styrofoam cups of water connected by an aluminum bar. The thermometers show the temperature of the water in cup A and cup B at the beginning of a heat-flow experiment. Over the next 15 minutes, which changes would most likely occur? *
1 point
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The temperature in cup A will decrease and temperature in cup B will increase.
The temperature in cup A will decrease and the temperature in cup B will decrease.
The temperature in cup A will increase and the temperature in cup B will increase.
The temperature in cup A will increase and the temperature in cup B will decrease.
20. Which process is most responsible for the temperature changes that will take place? *
1 point
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radiation of heat from the water in the cups to the thermometers
conduction of heat through the aluminum bar
radiation of heat from the water in the cups into the air
conduction of heat through the air to the water in the cups
21. A substance has a freezing point of -38 degrees Celsius and a boiling point of 356 degrees Celsius. At what temperature would this substance be in its liquid state? *
1 point
-100 degrees Celsius
-50 degrees Celsius
80 degrees Celsius
375 degrees Celsius
22. A wet shirt is put on a clothesline to dry on a sunny day. The shirt dries because water molecules *
1 point
gain heat energy and condense
gain heat energy and evaporate
lose heat energy and condense
lose heat energy and evaporate