Energy All Around Us: Forms & Conservation
Energy All Around Us: Forms & Conservation
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Energy All Around Us: Forms & Conservation
What do you already know about energy and where it comes from?
Learning Objective
At the end of the lesson you will explain different forms of energy, give examples, and understand the Law of Conservation of Energy.
What is Energy?
Energy is the ability to do work or cause change. Everything we do needs energy!
Why Do We Need Energy?
We need energy to move, keep warm, power machines, and light our homes.
Forms of Energy
There are many forms of energy: kinetic, potential, thermal, electrical, chemical, sound, and light.
Kinetic Energy
Kinetic energy is energy of movement. Runners, cars, and rolling balls have kinetic energy.
Potential Energy
Potential energy is stored energy. Examples are a stretched rubber band or water at the top of a hill.
Thermal Energy
Thermal energy is heat energy. It comes from moving particles. Hot tea, stoves, and the Sun give thermal energy.
Electrical Energy
Electrical energy comes from moving electrons. It powers our lights, TVs, and phones.
Chemical Energy
Chemical energy is stored in food, fuel, and batteries. We get it by eating and burning fuels.
Sound Energy
Sound energy is made when something vibrates, like a bell or a speaker.
Light Energy
Light energy helps us see. The Sun, bulbs, and screens give off light energy.
How Energy Changes Form
Energy can change form, like electrical energy turning into light and heat in a bulb.
Example: Lightbulb
A lightbulb turns electrical energy into light energy (and some heat!).
The Law of Conservation of Energy
Energy cannot be created or destroyed. It only changes from one form to another.
Energy Flow Diagram
See how energy flows from food to movement in a person running.
Real-life Examples
Plant Growth
Petrol's chemical energy turns into movement and heat.
Car Engine
Plants turn light energy from the Sun into food.
Quiz Time!
What form of energy makes a radio play music?
Sound energy
Question
Answer
Think Pair Share
Hint
Think about what the Law of Conservation says.
Discuss
Can energy ever disappear? Share your ideas.
Summary
You have learnt about different forms of energy and how energy is never lost, just changed!
Next Steps
Look around you. Can you spot different forms of energy at home or school? List examples to share next lesson!
Write down 3 things you learned in this lesson.
Write down 2 things you want to know more about.
Ask 1 question about something you haven't quite understood yet.
