2.1 Understanding energy

2.1 Understanding types of energyApril 12, 2023

Write down a definition of energy in everyday life: when you say you have no

energy what do you mean?

What do you think the scientific definition is?

ENERGY

Potential

Kinetic

Light

Sound

Heat

Electrical

Types of energy

Type of energy What is it?Potential

(elastic, gravitational, chemical)

KineticLight (electromagnetic)

Sound

Thermal (heat)

Electrical

Types of energy

Type of energy What is it?Potential

(elastic, gravitational, chemical)Stored energy that has the

potential of doing work

Kinetic Movement energy

Light (electromagnetic) Bright objects give out light energy

Sound Things that vibrate give off sound energy

Thermal (heat) Energy that is transferred from a hot to cold region

Electrical Flow of charge in an electrical circuit

Energy Circus

• There are a number of demonstrations for you to play with around the room.

• Complete the following table to show the energy transfers involved.

• Make sure you play with the equipment so you understand

Machine Energy Input Energy output Wasted energy?

Machine Energy Input Energy output Wasted energy?

maxpE maxpE

maxkE

Experiment Input Energy Output Energy Energy lost?

Grading tip•Part of meeting P1 is to list

types of energy. When doing your assignment, make sure you give all the different types of energy given previously.

Energy transformations

• We need energy to do all sorts of things. Running, reading and even sleeping require energy. Energy can be transformed from one form to another. Anything that takes in energy must also give out energy.

A girl running gets her energy from the food she eats. The energy is then transformed to movement, sound and heat energy

The light bulb that lights your room gets it energy from electricity. The energy is then transformed to light and heat energy. Don’t touch – it will burn

Activity A

• Write down three ways in which you have experienced energy being transformed today

•1•2•3

Using energy at home and in the workplace

• We use many different appliances at home and at work that convert energy from one form into others

Activity B • What are the types of energy going in and going out (there maybe more than one)

Truck:

Power station:

PS3/TV:

Fire:

Assessment 2.1

You are a food scientist working for a supermarket, looking at energy in food

1. Find out how much energy is stored in a can of drink (any type). This value will be clearly marked on the label P1

2. What form of energy is in the drink? P13. Investigate what happens to this drink as it

goes into your body P1