Science Grade 6 Unit 06: Conservation of Energy
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1 Science Grade 6 Unit 06: onservation of Energy
2 Some questions (c) 2013 by TEKS Resource System. Page 2
3 1 Which action in the science laboratory transforms chemical energy to thermal energy? using a hot plate to boil a beaker of water using a candle to melt sulfur in a test tube growing potted plants near a window flipping the light switch to turn on classroom lights 2 The Law of onservation of Energy states that F G H J energy is totally lost. more energy is produced. energy changes to matter like chemicals. energy changes form, but is not lost or gained. 3 flashlight battery is to light energy what a campfire is to thermal energy. electrical energy. chemical energy. nuclear energy. Page 3
4 Use the graph for the following five questions. Jacob designed an experiment to see how the color of a surface affects the amount of heat absorbed. He filled 4 different colored beakers with 20 water and exposed them to a heat source for 60 minutes. The graph illustrates Jacob s data at the end of the experiment. 4 What is the final temperature of the water in the white jar? F 28 G 31 H 33 J 34 Page 4
5 5 Which of the following experimental steps would be completed last? Record the temperature of the water at 15 minute intervals. Place the beakers 10 centimeters from a heat lamp. 8 What should be the label of the x axis? F Increase G Energy Transfer H olor of Jars J omparison Measure the initial temperature of the water. over one beaker with white paper, one beaker with grey paper, one beaker with black paper, and leave one jar uncovered. 6 Why did Jacob include a clear beaker in the experiment? F G H J He wanted to be able to observe all changes to the water. There wasn t another color available to test. The clear beaker is the control; the results can be compared to it. He knew the heat lamp would change the water temperature. 7 What is the EST title for Jacob s graph? olors Matter How the olor of a ontainer ffects Energy Transfer The Four Jar Experiment Why oes Water Heat Up in ifferent Types of ontainers? Page 5
6 9 Which of the following energy transformations is most similar to an electric pencil sharpener? Page 6
7 10 strid had a piece of lab equipment that was made of metal wire. She placed a piece of wax at point and point. She held the rubber handle and placed the tip of the wire above the flame of a unsen burner. Which piece of wax will melt first? F G H Neither will melt since the flame will not reach either or. J oth will melt close to the same time. Page 7
8 11 What diagram most accurately shows the movement of thermal energy? 12 Luis is investigating how heat moves. He heated a nail to 100 and placed it into 250 ml of 20 water. What is the most likely temperature of the water and the nail in 10 minutes? F The water is 10 and the nail is 110. G The water is 40 and the nail is 40. H The water is 70 and the nail is 40. J The water is 100 and the nail is Jacob is standing with his back facing a campfire. He notices that his back is much warmer than his chest. He knows that thermal energy is being transferred from the fire and that this method of energy transfer can happen even if no air is present. This method of energy transfer is convection. condensation. conduction. radiation. Page 8
9 14 obby is drinking a cup of hot chocolate as he sits by a campfire on a chilly evening. He knows that the cup of hot chocolate transfers thermal energy to the surrounding air. The heated air over his cup of hot chocolate expands and rises and is replaced by cooler, denser, air. This method of energy transfer is F convection G condensation H conduction J radiation 16 n ice cube is placed onto a hot pan that is sitting on the counter top. How will the thermal energy move? F The coldness will move from the pan to the ice cube. G The coldness will move from the ice cube to the pan. H The heat will travel from the pan to the ice cube. 15 Two friends decide to go to the park and watch a movie on a computer. The computer runs on battery power. What energy transformation is occurring from the battery to the light being given off by the computer? J The heat will move from the ice cube to the pan. chemical, electrical, light chemical, electrical, sound electrical, light, sound electrical, chemical, light Page 9
10 17 Electrical energy is being produced by transformation from nuclear energy and added to our nation's power grid. Some of the electrical power you use may come from nuclear energy. Use the flow map to see how energy is transformed from nuclear to electrical. Identify the energy transformations of each step. Example: Radioactive atoms are split in a nuclear reactor to heat water to steam. nuclear energy to thermal energy. The steam is blown across the blades of a turbine causing it to spin. to. The spinning turbine turns an electrical generator. to. Electrical energy from the generator is sent across power lines to do such things as turn on lights. to Page 10 E SURE YOU HVE REORE LL OF YOUR NSWERS ON YOUR NSWER OUMENT STOP
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