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The BIG idea Energy CHAPTER Energy has different forms, but it is always conserved. Energy exists in different forms. 3.1 Energy can change forms but is.

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Presentation on theme: "The BIG idea Energy CHAPTER Energy has different forms, but it is always conserved. Energy exists in different forms. 3.1 Energy can change forms but is."— Presentation transcript:

1 the BIG idea Energy CHAPTER Energy has different forms, but it is always conserved. Energy exists in different forms. 3.1 Energy can change forms but is never lost. 3.2 CHAPTER OUTLINE

2 VOCABULARY KEY CONCEPT CHAPTER HOME Energy exists in different forms. 3.1 SECTION OUTLINE SECTION OUTLINE kinetic energy energy potential energy Energy is the ability to cause a change. Different forms of energy produce changes in different ways. Kinetic energy depends on mass and speed. High Speed Low Speed

3 VOCABULARY KEY CONCEPT CHAPTER HOME Energy exists in different forms. 3.1 SECTION OUTLINE SECTION OUTLINE kinetic energy energy potential energy Potential energy depends on position and chemical composition. Energy is the ability to cause a change. Different forms of energy produce changes in different ways. Kinetic energy depends on mass and speed.

4 VOCABULARY KEY CONCEPT CHAPTER HOME energy 3.1 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Energy exists in different forms. The ability to do work or to cause a change. For example, the energy of a moving bowling ball knocks over pins; energy from food allows animals to move and to grow; and energy from the Sun heats Earth’s surface and atmosphere, which causes air to move. kinetic energy energy potential energy

5 VOCABULARY KEY CONCEPT CHAPTER HOME The energy of motion. A moving object has the most kinetic energy at the point where it moves the fastest. kinetic energy 3.1 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Energy exists in different forms. kinetic energy energy potential energy

6 VOCABULARY KEY CONCEPT CHAPTER HOME Stored energy; the energy an object has due to its position, molecular arrangement, or chemical composition. potential energy 3.1 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Energy exists in different forms. kinetic energy energy potential energy

7 VOCABULARY KEY CONCEPT CHAPTER HOME law of conservation of energy Energy can change forms but is never lost. 3.2 SECTION OUTLINE SECTION OUTLINE energy efficiency Energy often needs to be transformed in order to produce a useful form of energy. The law of conservation of energy states that energy is never created or destroyed.

8 VOCABULARY KEY CONCEPT CHAPTER HOME law of conservation of energy Energy can change forms but is never lost. 3.2 SECTION OUTLINE SECTION OUTLINE energy efficiency Energy often needs to be transformed in order to produce a useful form of energy. The law of conservation of energy states that energy is never created or destroyed. Energy can be transformed in many different ways, including from potential energy (PE) to kinetic energy (KE) and back again. PE KEPE KE

9 VOCABULARY KEY CONCEPT CHAPTER HOME A law stating that no matter how energy is transferred or transformed, it continues to exist in one form or another. law of conservation of energy 3.2 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Energy can change forms but is never lost. law of conservation of energy energy efficiency

10 VOCABULARY KEY CONCEPT CHAPTER HOME A measurement of usable energy after an energy conversion; the ratio of usable energy to the total energy after an energy conversion. energy efficiency 3.2 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Energy can change forms but is never lost. law of conservation of energy energy efficiency

11 VOCABULARY KEY CONCEPT CHAPTER HOME I. Energy exists in different forms. A. Different forms of energy have different uses. 3.1 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Energy exists in different forms. 1. Energy 2. Forms of Energy B. Kinetic energy and potential energy are the two general types of energy. 1. Kinetic Energy 2. Potential Energy kinetic energy energy potential energy

12 VOCABULARY KEY CONCEPT CHAPTER HOME 3.2 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Energy can change forms but is never lost. II. Energy can change forms but is never lost. A. Energy changes forms. B. Energy is always conserved. 1. Conversions Between Potential Energy and Kinetic Energy 2. Using Energy Conversions law of conservation of energy energy efficiency C. Energy conversions may produce unwanted forms of energy.


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