Henry8SCI (H8SCI_ENERGYTRANSFORM)

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1 Name: Date: 1. Light is an example of which type of energy? A. nuclear B. gravitational C. electromagnetic D. chemical 2. Juan thinks that water will evaporate faster in a warm place than in a cool one. He has two identical bowls and a bucket of water. He wants to do an experiment to find out if he is correct. Which one of the following should he do? A. Place a bowl of water in a cool place and a bowl holding the same amount of water in a warm place. B. Place two bowls holding the same amount of water in a warm place. C. Place a bowl of water in a cool place and a bowl holding twice as much water in a warm place. D. Place a bowl of water in a cool place and a bowl holding half as much water in a warm place. 3. A glass of water kept at room temperature long enough will become empty because A. water molecules slowly leak through the walls of the glass. B. water molecules move into the air as gas molecules. C. water left in a glass starts to boil and becomes a gas. D. water slowly combines with oxygen to become carbon dioxide. 4. Waves 1 and 2 show two different sound waves. Look carefully at the two waves. In what ways do their wave characteristics differ? A. Wave 1 has a longer wavelength and lower amplitude than wave 2. B. Wave 1 has a shorter wavelength and higher amplitude than wave 2. C. Wave 1 has a longer wavelength and a higher amplitude than wave 2. D. Wave 1 has a shorter wavelength and a lower amplitude than wave 2. 1

2 5. Mariam's mother had an ultrasound to see the baby growing inside of her. Which statement explains how ultrasound works? A. A special cream is heated and placed on her mother's stomach area, which produces an image on a computer. B. A fluorescent light is used to transmit light waves into her mother's body, which produce an image on a computer. C. Sound waves are sent into her mother's body, which reflect off of the baby and produce an image on a computer. D. A type of medicine is injected into her mother, which causes an image of the baby to be produced on a computer. 6. On a cold, winter day, Sheena rubs her hands together. Stored chemical energy is transformed into mechanical energy. Due to the Law of Conservation of Energy some of the energy is also transformed into A. heat energy. B. light energy. C. solar energy. D. kinetic energy. 7. It was a cold, sunny day and the ground was covered with fresh snow. Maria wore her black sweatshirt outside to play in the snow. She knew that black would light waves and help keep her warm. A. absorb B. diffract C. reflect D. refract 8. Josie sees lightning off in the distance. A few seconds later she hears thunder. What can Josie conclude? A. Sound waves do not travel long distances. B. Light waves travel faster than sound waves. C. Sound waves are weaker than light waves. D. Light waves last longer than sound waves. 9. Beaker X contains 100 milliliters of water and Beaker Y contains 250 milliliters of water. Each beaker is heated on a hot plate at the same medium heat setting for five minutes. Which is the best prediction of the water temperature in the beakers? A. Beaker X will have the highest temperature. B. Beaker Y will have the highest temperature. C. Beaker X and Beaker Y will have the same temperature. D. Beaker Y will have a temperature of 150 F. 10. People in many places in California produce their electricity from wind energy. Which must be true about the winds in these places in California? A. The winds are cold. B. The winds blow very little. C. The winds blow most of the time. D. The winds blow mostly in the morning. 2

3 11. What is the process by which heat energy gets to Earth from the Sun? A. conduction B. radiation C. subduction D. convection 12. A tuning fork with a frequency of 404 Hertz is struck with a soft hammer. The fork is struck a second time by the same hammer with twice as much force, and the volume, or amplitude, increases by a factor of two. What will the frequency of the second sound be? A. 101 Hertz B. 202 Hertz C. 404 Hertz D. 808 Hertz 13. Water that flows from behind a large dam can cause machines to produce electricity. What change takes place? A. Heat energy changes into mechanical energy. B. Sound energy changes into electrical energy. C. Chemical energy is used to produce electrical energy. D. Mechanical energy is used to produce electrical energy. 14. The distance between a wave's crest and its trough is known as its A. low tide measurement. B. water depth. C. wave height. D. wave length. 15. In which state of matter are molecules in contact with each other but free to move around? A. solid B. liquid C. gas D. plasma 16. Electromagnetic waves and mechanical waves are alike and different. What is one way in which these waves are similar? A. Both types of waves require a medium. B. Both types of waves have a frequency. C. Both types of waves transmit matter. D. Both types of waves have a pitch. Henry8SCI (H8SCI_ENERGYTRANSFORM) 3

4 17. Bill and Mary wanted to have a snack after school. They heated some milk in a pot on the stove to make hot chocolate. They also popped some popcorn in the microwave oven. How did Bill and Mary transfer heat energy to make these snacks? A. heating milk by radiation; popping popcorn by radiation B. heating milk by radiation; popping popcorn by convection C. heating milk by conduction; popping popcorn by radiation D. heating milk by convection; popping popcorn by conduction 18. Burt's mother asked him to use a spoon to stir the stew that was cooking on the stove. Which spoon will stay the coolest while he stirs? A. an iron spoon B. an aluminum spoon C. a wooden spoon D. a silver spoon 19. Which of these is not a form of energy? A. electrical B. light C. heat D. friction 20. The distance between one point on a compression and the corresponding point on the next compression in a sound wave is called a A. wavelength. B. rarefaction. C. crest. D. trough. Permission has been granted for reproduction by the Virginia Department of Education Virginia Department of Education 21. When a hair dryer is being used, one of the energy transformations that takes place is A. electrical to chemical. B. electrical to mechanical. C. mechanical to electrical. D. chemical to electrical. 22. Which represents kinetic energy? A. a bear standing in a field of berries B. a salmon resting in still water C. a bear holding a salmon it has caught D. a salmon leaping up a waterfall 4

5 23. Which of the following is an example of kinetic energy? A. a child jumping rope B. a swimmer ready to dive C. a stuffed toy lying on a table D. firewood stacked in a fireplace 24. Porous building materials are often used on the surfaces in classrooms and restaurants because these surface tend to sound waves. A. absorb B. refract C. reflect D. transmit 25. On a hot day, Jenny walked home from the grocery store with a bag of chocolate chips. When she arrived home the chocolate chips had melted in the bag. Why did the chocolate chips melt? Henry8SCI (H8SCI_ENERGYTRANSFORM) A. Heat transferred from the chocolate chips to the bag. B. Heat evaporated from the bag to the chocolate chips. C. Heat transferred from the environment to the chocolate chips. D. Heat condensed from her hand to the chocolate chips. This online assessment item contains material that has been released to the public by the Massachusetts Department of Education. 5

6 Answer Key 1. C) electromagnetic 2. A) Place a bowl of water in a cool place and a bowl holding the same amount of water in a warm place. 3. B) water molecules move into the air as gas molecules. 4. C) Wave 1 has a longer wavelength and a higher amplitude than wave C) Sound waves are sent into her mother's body, which reflect off of the baby and produce an image on a computer. 6. A) heat energy. 7. A) absorb 8. B) Light waves travel faster than sound waves. 9. A) Beaker X will have the highest temperature. 10. C) The winds blow most of the time. 11. B) radiation 12. C) 404 Hertz 13. D) Mechanical energy is used to produce electrical energy. 14. C) wave height. 15. B) liquid 16. B) Both types of waves have a frequency. 17. C) heating milk by conduction; popping popcorn by radiation 18. C) a wooden spoon 19. D) friction 20. A) wavelength. 21. B) electrical to mechanical. 22. D) a salmon leaping up a waterfall 23. A) a child jumping rope 24. A) absorb 25. C) Heat transferred from the environment to the chocolate chips. 6

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