Sixth Grade Science BLOCK 3 ASSESSMENT Heat, Light, and Sound

Transcription

1 Sixth Grade Science BLOCK 3 ASSESSMENT Heat, Light, and Sound Directions: Choose the best answer for each question. Then mark your choice on your answer sheet. 1. Which is the best activity to help keep a home cool in the summer? A) Close the shades where the sun is shining. B) Open the refrigerator often. C) Open the windows during the day. D) Turn off the television, radios, and computers. 2. Which of the following is an example of heat conduction? A) A metal cup heating up when hot water is poured into it. B) An air vent from a furnace sending hot air into the house. C) Cool air sinking to the ground on a cold night. D) The sun melting the ice formed on a frosty lawn. 3. Heating systems are often built right into the structure of the house itself. Which of the following would be the best place to put a heating vent in a house? 4. When a pot of water is put on a stove, the water at the top gets hot primarily by. A) condensation. B) conduction. C) convection. D) radiation. 5. When you walk across a cold floor with bare feet, your feet become cold. Which of these is the most likely cause of your feet becoming cold? A) Heat always moves from cooler to warmer objects. B) Heat always moves from warmer to cooler objects. C) The floor absorbs fast-moving electrons from your feet. D) Your feet absorb colder molecules from the floor. 6. Soda pop is poured into an insulated cup. What happens to the heat flow? A) It increases. B) It speeds up. C) It slows down. D) It stays the same. A) The ceiling, because heat falls B) The doors, because the best place to add heat is where the heat gets lost C) The floor, because heat rises D) The walls, because the more surface covered, the more heat given off 1

2 7. By what process does heat energy travel from the sun to the earth? 10. Fast food restaurants keep food hot with infrared lamps. How is the heat transferred to the food? A) Condensation B) Conduction C) Convection D) Radiation A) It is conducted through air molecules. B) It is radiated through space. C) It is transferred through the air by convection. D) It travels through the wind. 8. What is the primary way heat moves through liquids and gases? A) Reflection B) Conduction C) Radiation D) Convection 9. A man who was sleeping wakes up because he hears the smoke alarm go off in his house. Before opening the bedroom door, the man feels the door to see whether it is warm. He is assuming that heat would be transferred through the door by which process? A) Conduction B) Convection C) Radiation D) Compression 11. A flowing stream contains water at 18º C. Cans of soda at 28º C are lowered into the stream. Which of the following will most likely occur? A) The heat from the cans will go into the cold water and cool off the soda B) The cans will cool until their temperature is the same as that of the stream. C) The temperature of the soft drinks will not change since the cans are sealed. D) The temperature of the cans will decrease to freezing as long as the stream is flowing. 12. In a room in the wintertime, where would you find the warmest air? A) By a window B) In the corners C) Near the ceiling D) Near the floor 2

3 13. If an object looks red, what color of light is it reflecting? A) Blue B) Red C) Yellow D) All but red 16. What happens to the light particles when light hits an uneven surface? A) They are absorbed by the surface. B) They are reflected off in a straight line. C) They are scattered in many directions. D) They pass through the surface. 14. Why do you see your image in mirrors? A) Light is absorbed. B) Light is diffused. C) Light is reflected. D) Light is refracted. 17. How does a prism affect light? A) It absorbs all the light. B) It reflects the light in a straight line. C) It separates the light into different colors. D) It scatters the light in many directions. 15. Which of the following is an example of a light reflector? A) Campfire B) Exploding fireworks C) Lightning D) The moon 18. If light waves change speed when they pass from one medium into another, the light is. A) diffracted. B) reflected. C) refracted. D) separated. 19. What is it called when light bounces off a surface? A) Diffraction B) Interference D) Absorptiion 3

4 20. What happens to light when it passes through a translucent material such as waxed paper? A) All of the light is reflected in a straight line. B) Some of the light passes through. C) Some of the light is absorbed and very little is reflected. D) None of the light is allowed to pass through. 24. When you look at a pencil in a cup of water the pencil looks broken. What cause this? A) Absorption B) Dispersion D) Refraction 25. What happens to sound as the energy used to create the vibrations increases? 21. Lenses are used in cameras, projectors, telescopes, microscopes, and eyeglasses to bend light rays. What is this bending of light called? A) The pitch of the sound is higher. B) The sound becomes louder. C) The sound becomes softer. D) The sound waves get further apart. A) Absorption B) Dispersion D) Refraction 22. In which of the following examples will refraction occur? 26. Comparing both the frequency (pitch) and the amplitude (volume) of these two sounds, which of the following is correct? A) Green light interfering with blue light B) Light bending around the corner of a door C) Light reflecting off of a mirror D) Light traveling from air to glass 23. Which of these objects is translucent? A) Cardboard B) Glass C) Wood D) Waxed paper A) Sound A is higher in pitch and higher in B) Sound A is lower in pitch and lower in C) Sound A is higher in pitch and lower in D) Sound A is lower in pitch and higher in 4

5 27. In order to produce sound, an object must be. A) close to the listener. B) heated. C) in a gas. D) vibrating. 31. What would you do to lower the pitch of a string on a stringed instrument? A) Lengthen the string B) Tighten the string C) Pluck the string very lightly D) Shorten the string 28. You produce speech by vibration of the. A) nose. B) skin. C) throat bones. D) vocal cords. 29. If you increase the volume of a sound you also increase. A) the amount of energy used to create the sound. B) the frequency of the sound. C) the pitch of the sound. D) the material that the sound travels through. 32. A class performs an experiment in which they place a bell in different situations. DATA TABLE Placement of Bell Volume of Sound held against railroad track ringing heard very clearly in jar that has no air no sound heard held up in the air ringing heard very faintly held underwater ringing heard well Which problem was being investigated in this experiment? A) How does pitch change when a bell is moving? B) How much faster does light travel than sound? C) Through what material does sound travel best? D) What is the best material to use in musical instruments? 30. What is the material through which a sound wave travels? A) A medium B) Air C) Water D) Opaque. 5