Heat Around and Find Out 7.P.11.1
Change Forms and Go 7.P.11.2
Kinetic Potential 7.P.11.2
Save Your Energy 7.P.11.3
That's The Way Heat Flows 7.P.11.4
Experiment or Nah 7.N.1.3
100
Removing heat from a system may result in a temperature change. Which of the following changes in temperature show that heat was removed from a system?
A. 10° C to 20° C
B. 12° C to 11° C
C. 15° C to 20° C
D. 20° C to 30° C
B. 12° C to 11° C
100
Betsy depends on her electric alarm clock every morning to get up in time for school. What energy transformation happens in Betsy’s alarm clock to wake her up in the morning?
A. Electrical energy is converted to sound energy.
B. Sound energy is converted to electrical energy.
C. Electrical energy is converted to thermal energy.
D. Chemical energy is converted to kinetic energy.
A. Electrical energy is converted to sound energy.
100
Which of the following statements is the best description of how kinetic energy differs from potential energy?
A. Kinetic energy is energy of motion and potential energy is stored energy.
B. Kinetic energy can be measured and potential energy cannot be measured.
C. Kinetic energy is in every object, but some objects do not have potential energy.
D. Kinetic energy is a form of mechanical energy, but potential energy is not mechanical energy.
A. Kinetic energy is energy of motion and potential energy is stored energy.
100
Which statement is accurate according to the Law of Conservation of Energy?
A. Energy cannot be created.
B. Energy cannot be changed.
C. Energy cannot be converted.
D. Energy cannot be transformed.
A. Energy cannot be created.
100
Energy as heat flows in predictable ways. If an object has a temperature of 42 °C, to which of the following objects will it transfer heat?
A. object A at 48° C
B. object B at 40° C
C. object C at 44° C
D. object D at 46° C
B. object B at 40° C
100
When is an investigation also an experiment?
A. when it involves measurement
B. when it represents key characteristics of a system
C. when it observes living organisms in their natural habitat without altering the setting
D. when it involves the identification of variables and a control
D. when it involves the identification of variables and a control
200
Temperature changes may result from adding or removing heat from a system. Which of the following does temperature measure?
A. The state of matter that makes up the object
B. The electrical energy that is present in the object
C. The energy transferred when an object changes state
D. The average kinetic energy of the particles that make up the object
D. The average kinetic energy of the particles that make up the object
200
Mark rubs his hands together quickly on a winter evening. Why does rubbing your hands together help warm them?
A. heat is absorbed from the air by the hands
B. heat is generated by mechanical energy (friction) being converted to heat energy
C. heat is conducted between two hands when they are touching
D. heat is transferred back and forth between two hands when they are close together
B. heat is generated by mechanical energy (friction) being converted to heat energy
200
As shown in the diagram below, a 10 kg block starts from rest at point A and slides along a track past point B to point C.
Which of the following is a correct statement about the potential energy of the block?
A. It will be destroyed at point C.
B. It will be greatest at point B.
C. More energy will be created as it moves from point B to C.
D. It will be greatest at point A.
D. It will be greatest at point A.
200
Which of the following best demonstrates the Law of Conservation of Energy?
A. a person creating a painting
B. a person cutting down trees in a forest
C. a person recycling various materials
D. a person using a bulldozer to tear down a building
C. a person recycling various materials
200
The transfer of energy as heat occurs all around us. When a warmer stream flows into a cooler lake, which of the following happens?
A . The stream water absorbs cold from the lake water.
B . The lake water transfers heat to the stream water.
C . The stream water transfers heat to the lake water.
D . The lake water absorbs cold from the stream water.
C . The stream water transfers heat to the lake water.
200
Scientific questions can lead to various types of investigation, including surveys, research of scientific literature, and experiments. Questions that have variables often lead to an experiment.
Which of the following questions would most likely lead to a controlled experiment?
A. How do hurricanes form?
B. How can you show a volcano erupting?
C. What types of birds migrate in the winter?
D. How does temperature affect the rate of reaction?
D. How does temperature affect the rate of reaction?
300
A teacher places a metal spoon in a beaker of boiling water and then into a bowl of ice. How will heat flow?
A. Heat will flow from the ice cubes into the hot metal.
B. Heat will flow from the hot metal into the boiling water.
C. Heat will flow from the frozen metal into the glass beaker.
D. Heat will flow from the hot metal into the ice cubes.
D. Heat will flow from the hot metal into the ice cubes.
300
When you bend a glow stick, a small chamber inside breaks, releasing a substance that reacts with other substances inside the glow stick. The reaction that takes place causes the glow stick to glow. What energy transformation takes place when a glow stick lights up?
A. sound energy to light energy
B. chemical energy to light energy
C. thermal energy to light energy
D. electrical energy to light energy
B. chemical energy to light energy
300
Identify the energy transformation that occurs when a car is speeding up:
A. Chemical energy to kinetic energy
B. Kinetic energy to potential energy
C. Potential energy to kinetic energy
D. Thermal energy to chemical energy
C. Potential energy to kinetic energy
300
Which statement is accurate about the energy in a flashlight?
A. Chemical energy is converted into sound energy.
B. Energy is not converted if batteries are used.
C. Chemical energy is converted into electrical energy.
D. Light energy is converted into chemical energy.
C. Chemical energy is converted into electrical energy.
300
A large piece of a glacier broke off into the ocean. Which of the following actions would you predict will happen with the ocean water?
A . Heat will flow from the water to the ice.
B . Heat will flow from the ice to the water.
C . Cold will flow from the water to the ice.
D . Cold will flow from the ice to the water.
A . Heat will flow from the water to the ice.
300
A biologist was in a forest when he came across a family of squirrels hiding nuts for the winter. The biologist was interested in this behavior, so he stayed and watched the squirrels for a few hours. He recorded what he observed in a notebook. Which of the following explains why this type of research is not considered an experiment?
A. The biologist did not observe the squirrels for long enough to collect data.
B. The biologist came across the squirrels by chance and had no formal plan.
C. The biologist observed the squirrels and did not test variables.
D. The biologist did not collect valid data on the different species of squirrels present.
C. The biologist observed the squirrels and did not test variables.
400
Adding or removing heat from a system may result in a temperature change. Ben found a penny outside on the hot sidewalk. He brought it inside and added it to a cup of room temperature water.
What will happen to the penny’s temperature once he puts it in the cup of water?
A. the heat will transfer from the penny to the water
B. the heat will transfer from the water to the penny
C. the penny will not change temperature
D. the penny will change state
A. The heat will transfer from the penny to the water
400
Leona uses a rechargeable electric toothbrush to brush her teeth. As it is used, the energy stored in the battery is depleted to make the toothbrush operate. What happens when Leona plugs her toothbrush into an electrical outlet to recharge?
A. Chemical energy is transformed to sound energy.
B. Chemical energy is transformed to kinetic energy.
C. Electrical energy is transformed to kinetic energy.
D. Electrical energy is transformed to chemical energy.
D. Electrical energy is transformed to chemical energy.
400
Which of the following scenarios best demonstrates the conversion of potential energy to kinetic energy?
A. a ball rolling across the floor
B. a stretched rubber band being released
C. a book sitting on a shelf
D. a burning candle
B. a stretched rubber band being released
400
When we eat, a chemical reaction occurs in our bodies. According to the Law of Conservation of Energy, what happens to the food we consume?
A. it is destroyed during digestion
B. it is created in our cells
C. it is turned into oxygen gas for us to breathe
D. it is broken down and converted into usable energy
D. it is broken down and converted into usable energy
400
Look closely at the illustration below. Which of the following indicates the correct direction of the flow of energy as heat?
A. From the kettle to the stove
B. From the steam to the kettle
C. From the steam to the spoon
D. From the spoon to the steam
C. From the steam to the spoon
400
Claire decided to find out which wildflowers are most abundant near roadsides in her community. Which of the following would best help Claire with her investigation?
A. observation
B. making a model
C. using a computer simulation
D. conducting a controlled experiment
A. observation
500
Jonathan performed an experiment using a heating lamp, a cup of water (A), an empty cup (B), and two thermometers as shown in the illustration below. After 40 minutes he observed the temperature inside each cup.
Based on the illustration, what do you think Jonathan observed at the end of his experiment?
A. The temperature measured in Cup A is higher than Cup B.
B. The temperature measured in Cup A is lower than Cup B.
C. The temperatures in Cup A and Cup B are the same.
D. The temperatures in Cup A and Cup B did not change.
B. The temperature measured in Cup A is lower than Cup B.
500
As part of his study of the transformation of energy, Roberto set up the system shown in the illustration below.
What forms of energy did Roberto demonstrate with his system?
A. electrical, light, sound, and chemical
B. electrical, light, sound, thermal, and chemical
C. electrical, sound, thermal, and chemical
D. electrical, light, thermal, and chemical
D. electrical, light, thermal, and chemical
500
Which of these is an example of kinetic energy transforming into potential energy?
A. a rock sitting still at the top of a hill
B. a stretched rubber band waiting to be released from a slingshot
C. a person riding a bike to the top of a hill
D. water stored behind a dam
C. a person riding a bike to the top of a hill
500
Friction is a force that opposes motion. When friction is present, heat is usually generated. According to the Law of Conservation of Energy, which of the following statements is accurate about the energy associated with friction?
A. The Law of Conservation does not apply.
B. It was not transformed from another type of energy.
C. The energy is converted into thermal energy.
D. Energy is created as heat.
C. The energy is converted into thermal energy.
500
Study the illustration below, which shows two substances at different temperatures.
Which of the following statements is the most accurate description of what will happen when the cube is added to the liquid in the beaker?
A. Both the cube and the liquid will exchange heat so that they both reach the temperature of the object.
B. Both the cube and the liquid will exchange heat so that they both reach the temperature of the water.
C. The cube will get even warmer as heat flows into it from the liquid.
D. Both the cube and the liquid will reach the same temperature as heat flows from the warmer object to the cooler liquid.
D. Both the cube and the liquid will reach the same temperature as heat flows from the warmer object to the cooler liquid.
500
Jed is interested in learning about hurricane patterns. What should he do to gain the knowledge he seeks?
A. Make a 3-D model of a hurricane.
B. Observe computer simulations of hurricanes.
C. Go outside to observe the path of a hurricane while it is happening.
D. Design an experiment that shows how hurricanes form.
B. Observe computer simulations of hurricanes.