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 Energy 40 Flashcards |
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What is the unit of work in the SI system? |
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Joule (J) |
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Which of the following is a type of energy that results from motion? A) Potential Energy B) Kinetic Energy C) Chemical Energy D) Magnetic Energy |
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B) Kinetic Energy |
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Riddle: I am the energy stored in the position of an object, waiting to be released. What am I? |
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Potential Energy |
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True or False: Energy can be created and destroyed according to the law of conservation of energy. |
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False. Energy cannot be created or destroyed, only transformed from one form to another. |
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The formula for calculating work is W = F × _____. |
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S (displacement) |
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What type of energy is produced when we burn fuels like wood or coal? |
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Heat energy |
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Which energy is used to power electric devices such as fans and lights? |
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Electric energy |
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Fill in the blank: The energy produced by vibrating objects is called _____. |
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Sound energy |
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True or False: Light energy can directly move objects. |
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False. Light energy is weak and does not move objects directly. |
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In a hydroelectric dam, the potential energy of water changes into _____ when it is released. |
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Kinetic energy |
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Which energy transformation occurs when a torch is switched on? A) Chemical to Light B) Light to Chemical C) Electric to Sound D) Kinetic to Potential |
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A) Chemical to Light |
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Riddle: I light up your room and help you see, but I start as electric energy. What am I? |
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Light energy from a bulb |
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Fill in the blank: The energy stored in fuels like coal, oil, and gas is known as _____. |
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Chemical energy |
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What is the relationship between work done and the distance moved by an object? |
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The work done increases with the distance moved. |
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True or False: Nuclear energy is released only when light nuclei combine. |
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False. Nuclear energy is released when heavy nuclei split or when light nuclei combine. |
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What is the ultimate source of energy for all forms on Earth? |
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The Sun |
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When mechanical energy is converted into heat energy due to friction, what is this process called? |
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Inter-conversion of energy |
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Which of the following is NOT a form of energy? A) Mechanical B) Thermal C) Gravitational D) Static |
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D) Static |
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Fill in the blank: The ability of an object to do work is referred to as _____. |
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Energy |
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Riddle: I can be stored in food and released when you eat, giving you the power to run and compete. What am I? |
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Chemical energy |
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