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Warm UP #19 What form of energy is in foods?

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Presentation on theme: "Warm UP #19 What form of energy is in foods?"— Presentation transcript:

1 Warm UP #19 What form of energy is in foods?
What is the source of the energy in food?

2 Ch. 11 Energy and energy resources
Lesson 1: Forms of Energy

3 Essential Questions What is energy?
What are potential and kinetic energy? How is energy related to work? What are different forms of energy?

4 Can you make a change in matter? activity
You observe many things changing. Birds change their positions when they fly. Bubbles form in boiling water. The filament in a lightbulb glows when you turn on a light. How can you cause a change in matter? Half-fill a foam cup with sand. Place the bulb of a thermometer about halfway into the sand. Record temperature. Remove thermometer and place a lid on the cup. Hold down lid and shake the cup vigorously for 10 minutes. What do you think will happen when I place the thermometer back in? Remove lid and place thermometer back in, halfway down. Record temperature. What changes did you observe in the sand? What caused the change?

5 Energy – the ability to cause change
What are some ways that energy is causing change in the classroom? What is the definition of energy? BrainPOP- Forms of Energy

6 Kinetic Energy Kinetic energy – energy due to motion
All moving objects have kinetic energy All object's kinetic energy depends on its speed The faster an object moves, the more kinetic energy it has A moving object’s kinetic energy also depends on its mass If 2 objects move at the same speed, the object with more mass has more kinetic energy

7 Forms of Energy I need 2 students to come to the front of the room.
You will be tossing the ball back and forth to one another, gently. What is causing the ball to move from one student to the other? Where did the energy come from? BrainPop – Kinetic Energy

8 Potential Energy – stored energy due to the interaction between objects or particles
Energy can be present even if objects are not moving Does this book have energy? What about if I drop the book, does it have energy? BrainPOP – Potential Energy

9 Potential Energy How can a ball that is dropped have potential energy and kinetic energy at the same time? What factors determine the gravitational potential energy stored between an object and Earth? How do potential energy and kinetic energy differ?

10 Warm Up #20 How is energy related to work?

11 Potential Energy Gravitational Potential Energy – if has mass and height above Earth’s surface Determined by mass of object and distance the object is from Earth An object with greater mass or greater height has a greater gravitational potential energy Elastic Potential Energy – energy stored in objects that are compressed or stretched (springs or rubber bands) Chemical Potential Energy – energy stored in chemical bonds between atoms Ex: food, gasoline, etc.

12 Energy and work You can transfer energy by doing work – the transfer of energy that occurs when a force is applied over a distance Work depends on both force and distance You only do work on an object if that object moves Due to connection between work and energy, energy is sometimes described as the ability to do work

13 Forms of Energy

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