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# 7th Grade Chapter 4 Lesson 5 Slideshare

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For Student Use Only

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### Transcript

• 1. Pgs. 145-151 For Student Use Only
• 2. Energy and Work are the same. -Energy is the ability to do work - Work is a force applied to an object (a push or pull)
• 3. Potential and Kinetic Energy are different. -Potential Energy is stored energy. - Kinetic Energy is energy in motion.
• 4. Can energy change from one form to another? -Kinetic- energy in motion -Potential- stored energy -Radiant- energy in the form of electromagnetic waves
• 5. What is the law of conservation of matter and energy?
• - Energy (and matter) are transferred from one object or state to another.
• - Energy and Matter are not changed by natural forces.
• 6. What is the first law of thermodynamics?
• All of the above
• None of the above
• Matter is not created or destroyed
• The total amount of matter and energy in the universe is constant
• For every action there is an equal and opposite reaction
• 7. How does an object gain energy?
• Note-
• -An object in rest will stay at rest until a force moves it.
• An object in motion will stay in motion until force is acted upon it.
• You must do work in order to gain energy.
• 8. What is the transfer of energy?
• For Example:
• When a basketball is bounced energy can also be transferred into sound, heat, ground waves.
• 9.
• What are the three types of heat transfer?