1) What happens when two magnets are attracted to each other? a) A. Their magnetic fields get bigger. b) B. They point to the North Pole. c) C. They come closer together. d) D. They push away from each other. 2) Which of these is produced when two objects are rubbed together? a) electricity b) friction c) light d) heat and light 3) Which of these is an example of noise? a) birds chirping b) lullaby being sang c) running river water d) ambulance siren sound 4) Which pair of objects is luminous? a) bee and firefly b) sun and stars c) lamp and notebook d) candle and toy gun 5) Which of these explains why humans need the sun? a) It keeps us warm. b) It makes plants grow. c) It allows us to see the surroundings. d) All of the above 6) Which of these does NOT produce sound? a) blowing b) striking c) watching d) tapping 7) Kayla’s family is cooking lunch on an outdoor grill. Which items are giving off both light and heat? a) the coals and the air b) the food and the flames c) the grill and the food d) the coals and the flames 8) All of these are moving in the direction of the pull of gravity EXCEPT _______. a) a rollercoaster going down a hill b) a helium balloon rising into the sky c) rain falling from the sky d) a fruit dropping down from the tree 9) An object that does not vibrate cannot produce ______. a) light b) heat c) sound d) electricity 10) What does vibrate mean? a) a type of energy that you can hear b) how loud or soft a sound is c) how high or low a sound is d) to move back and forth quickly 11) It is the process of something moving or changing place, or even just changing position. a) speed b) motion c) time d) distance 12) An objects in motion can be changed by __________. a) size b) weight c) push or pull d) temperature 13) Throwing a ball and moving a chair are an examples of _______. a) push b) pull c) gravity d) weight 14) It is the Earth’s primary source of heat and light. a) stars b) sun c) moon d) fire 15) It is generated by power plants. a) heat energy b) electricity c) sound energy d) static electricity

Review in Science 3

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