Unit 2 Energy Test

1. Which action would transfer the most SOUND energy?

• turning on a flashlight
• warming food by a fire
• unplugging a cord from an outlet
• hitting a baseball with a wooden bat

2. Which types of energy transfer are taking place when a television is turned on?

• heat and light only
• sound and light only
• heat, sound, and electricity only
• heat, sound, light, and electricity

3. Maria fills a glass with water. She measures the temperatures of the water. Maria puts the glass in the sunlight. She measures the temperature every 10 minutes for one hour. Which question is she trying to answer?

• Does glass heat up faster than water?
• How long does it take the water to evaporate?
• How quickly will the water cool down when heated?
• Does energy from the sun heat up the water in the glass?

4. Santiago says that batteries produce energy. What does he most likely mean?

• Batteries make up energy from nothing.
• Batteries are the only way energy is stored.
• Batteries are the original source of all energy.
• Batteries convert chemical energy to electrical.

5. Terri needs to find a way to light up her closet. The device should use electricity and cost no more than $10. Which solution will solve her problem?

• a chemical glow stick that costs $3
• a battery-powered ceiling light that costs $9
• A battery-powered flashlight that costs $15
• A lamp with an electric cord that costs $25

6. The light in Evan's room is too bright. How could he control the brightness of the light bulb?

• take the light bulb out of the lamp
• use a bigger bulb
• change the amount of energy that is being transferred to the bulb
• change the length of the cord that connects to the bulb

7a. Tanya is shooting a bow and arrow. Select the correct words to finish the sentences: When Tanya pulls back on a string to shoot the arrow, energy is being:

• motion
• released
• stored

7b. When she lets go of the string, potential energy will be transferred to ________ energy.

• motion
• released
• stored

11. Click on the 2 correct statements about the energy of a wind turbine.

• A wind turbine STORES motion energy
• Energy from a wind turbine CANNOT be transferred to a house
• The energy from a wind turbine CAN BE transferred to heat a house
• More collisions between air molecules and the wind turbine will make the wind turbine move faster

12. Elaine claims the train has MORE energy on one part of the track. Which evidence supports her claim?

• The train is speeding up between 2 and 3.
• The train is slowing down between 1 and 4.
• The train is moving fastest between 3 and 4.
• The train is moving slowest between 1 and 2.