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Unit 5 Lessons 1 & 2 Energy Test Review Q1 Which of these shows chemical energy being used to produce kinetic energy? (a) turning a light switch to turn on a lamp (b) baking cookies in an oven (c) using gasoline to run an engine A1 (c) using gasoline to run an engine Q2 Which type of energy is due to the movement of electrons? A2 Electrical Energy Q3 What could you do to decrease the thermal energy of an object? A3 Cool it Q4 What is an experiment you could do to show that plants need light to grow? A4 Various answers Example: grow plants in light and plants without light and compare how they grow Q5 What natural source of energy would cause a swimming pool to warm up in the daytime? A5 Solar Energy Q6 If a thermometer is placed in a glass of ice water, how will the thermal energy be effected? A6 A decrease in thermal energy, causing the liquid to contract. Q7 When you push a spring together, before releasing it, what type of energy do you have? Kinetic or potential? A7 Potential Energy Q8 Which of the following can only be seen because of light reflecting off of it from a source other than itself? A) sun B) lightning C) flashlight D) cloud A8 D) cloud Q9 A thermometer measures which kind of energy? A9 Thermal Energy Q10 What conditions are best for a solar cooker to heat food? A10 When a solar cooker is placed outside in a sunny location, with no shade. Q11 When a balloon is rubbed on a wool cloth, it will receive a negative charge. What happens when this balloon is placed near a wall and why? A11 The balloon sticks to the wall because the negative charged object is attracted to an object with no charge. Q12 Which energy transformation happens when a fan is plugged into a wall and turned on? A12 Electrical energy into energy of motion Q13 What is the dependent variable in the following scientific question? What is the effect of the amount of times (5 or 20) a balloon is rubbed on a piece of wool, on the number of cereal pieces the balloon will pick up? A13 The number of cereal pieces the balloon picks up. Q14 What is the independent variable in the following scientific question? What is the effect of the amount of times (5 or 20) a balloon is rubbed on a piece of wool, on the number of cereal pieces the balloon will pick up? A14 The number of rubs (5 or 20) on the piece of wool. Q15 What are 3 predictions for this experiment? What is the effect of the amount of times (5 or 20) a balloon is rubbed on a piece of wool, on the number of cereal pieces the balloon will pick up? A15 1. The balloon with 5 rubs on the wool will pick up more cereal. 2. The balloon with 20 rubs on the wool will pick up more cereal. 3. The balloon with 5 rubs will pick up the same number of cereal pieces as the balloon with 20 rubs.
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