Top Banner
Energy The 3 main types of energy are: • Potential energy • Kinetic energy • Chemical energy
25

Energy / Physics / KS2

Apr 24, 2015

Download

Education

iesbscience

 
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Page 1: Energy / Physics / KS2

Energy

The 3 main types of energy are:

• Potential energy• Kinetic energy• Chemical energy

Page 2: Energy / Physics / KS2

Energy

• Scientists define energy as the ability to do work.

• Energy makes things happen. • The energy in sunlight makes plants grow, the

energy in food enables us to move and helps us to keep warm, and the energy in fuel powers engines.

Page 3: Energy / Physics / KS2

Energy

• Energy comes in many different forms and can be converted from one form into another.

Page 4: Energy / Physics / KS2

Potential Energy

• Energy that is stored up ready to be used in the future is called potential energy, because it has the potential (or ability) to do something useful later on.

Page 5: Energy / Physics / KS2

Potential Energy

• An object usually has potential energy because a force has moved it to a different position or changed it in some other way.

• When an object releases its stored potential energy, this energy is converted into energy of a different form.

Page 6: Energy / Physics / KS2

Kinetic Energy

• Moving objects have a type of energy called kinetic energy. The more kinetic energy something has, the faster it moves.

Page 7: Energy / Physics / KS2

Kinetic Energy

When objects slow down, their kinetic energy is converted into another type of energy, such as heat or sound.

Objects at rest have no kinetic energy. Kinetic energy is often produced when objects release their potential energy.

Page 8: Energy / Physics / KS2

Example: Hammer striking a nail

• A moving hammer has a lot of kinetic energy. As it strikes the nail, it slows down and loses its kinetic energy. The energy does not disappear, however. Some of it goes to split the wood to make way for the nail, some passes into the wood as heat energy, and some is converted into sound.

Page 9: Energy / Physics / KS2

WHAT IS ENERGY?

Page 10: Energy / Physics / KS2

Potential / Kinetic Energy Example

Page 11: Energy / Physics / KS2

Potential / Kinetic Energy Example

Page 12: Energy / Physics / KS2

Potential / Kinetic Energy Example

Page 13: Energy / Physics / KS2

Potential / Kinetic Energy Example

Page 14: Energy / Physics / KS2

Task

• In your groups list as many examples of:– Potential Energy– Kinetic Energy

Page 15: Energy / Physics / KS2

Chemical Energy

Page 16: Energy / Physics / KS2

Chemical Energy

• This is the energy involved in chemical reactions, when elements join together into compounds.

• This energy is stored inside the compounds as chemical potential energy. The stored energy can be released by further chemical reactions.

Page 17: Energy / Physics / KS2

Chemical Energy

• The food we eat stores energy that is released by digestion.

• Energy can also be released by burning the chemicals in a process called combustion.

• Fuels are chemical compounds that release heat energy by combustion.

Page 18: Energy / Physics / KS2

Food as Chemical Energy

• When humans or other animals eat food, they use its stored energy to keep warm, maintain and repair their bodies, and move about.

Page 19: Energy / Physics / KS2

Food as Chemical Energy

• Different types of food store different amounts of energy. The amount of energy a food contains is measured in kilocalories (called Calories for short).

Page 20: Energy / Physics / KS2

Task

1. In your table groups, on one piece of paper, list four foods you think contain high levels of calories.

2. How many calories are there in a McDonalds Big Mac Meal?

Page 21: Energy / Physics / KS2

Task

• How many calories do you think the following organisms burn, on average, in a day?– Elephant– Panda– Adult man– Adult woman– Child (7-10 years)– Mouse

Page 22: Energy / Physics / KS2

Chemical Energy

Page 23: Energy / Physics / KS2

Chemical Energy Examples

Page 24: Energy / Physics / KS2

Chemical Energy Examples

Page 25: Energy / Physics / KS2

• Art of Flight Trailer - Demonstrations of Energy