Introduction to Energy! 6 th Grade Module H: Matter and Energy Unit 2: Energy Lesson 1
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1 Introduction to Energy! 6 th Grade Module H: Matter and Energy Unit 2: Energy Lesson 1
2 Energy is
3 There are two main types of energy Kinetic energy - energy of an object that is due to motion. All moving objects have kinetic energy. depends on its mass and speed. increases as mass increases and as speed increases Which has more kinetic energy? Why?
4 Potential energy - energy that an object has due to its position, condition, or chemical composition. Gravitational potential energy result of an object s position Increases as the object s height or mass increases. Which has greater GPE?
5 Condition of an object affects its potential energy. Ex: Stretching a rubber band increases its potential energy. Chemical potential energy - depends on chemical composition. As bonds break and new bonds form between atoms during a chemical change, energy can be released.
6 Where is potential energy the greatest, when the archer has pulled back the bow or when it is in resting position?
7 An object can have both potential and kinetic energy at the same time. Read and do p
8 Forms of kinetic and potential energy Energy is expressed in joules (J). 1. Mechanical energy is the sum of an object s kinetic energy and potential energy. It is the energy of position and motion. "mechanical energy = kinetic energy + potential energy".
9 2. Sound energy is kinetic energy caused by the vibration of something. -vibrations in the air get transferred to the eardrum
10 3. Electromagnetic energy - transmitted through space in the form of electromagnetic waves. caused by the vibration of electrically charged particles. include visible light, X-rays, and microwaves Kinetic or potential? What do you think?
11 4. Electrical energy is the energy that results from the flow (movement) of charged particles. (K or P?) 5. Chemical energy - form of potential energy that depends on the kinds of atoms and their arrangement. -examples: food, batteries, matches
12 6. Thermal energy - kinetic energy of an object s particles. faster the molecules move = more thermal energy Heat: energy transferred from an object at a higher temperature to an object at a lower temperature
13 7. Nuclear energy - found in nucleus of an atom When an atom s nucleus breaks apart, or when the nuclei of two small atoms join together, energy is released.
14 Unit 2 Lesson 1 Introduction to Energy What forms can energy take? What forms of energy can you identify in this pinball game?
15 Unit 2 Lesson 1 Introduction to Energy Transformers What is an energy transformation? An energy transformation takes place when energy changes from one form into another form. Any form of energy can change into any other form of energy. Often, one form of energy changes into more than one form.
16 Unit 2 Lesson 1 Introduction to Energy What is an energy transformation? In a flashlight, chemical energy is transformed into electrical energy. The electrical energy is then transformed into light and thermal energy.
17 Unit 2 Lesson 1 Introduction to Energy Is energy conserved? A closed system is a group of objects that transfer energy only to one another. Energy is conserved in all closed systems. The law of conservation of energy states that energy cannot be created or destroyed. It can only change forms. All of the different forms of energy in a closed system always add up to the same total amount of energy.
18 Energy Posters Forms of Energy Energy Transformation State the form Define Kinetic or potential (or both)? Examples with pictures Use pages Check with Ms. R to make sure yours is not taken State the type of energy it is transforming FROM and TO Examples with pictures Where is energy lost to the environment? Use pages & computer
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