Matter: Mass and volume

Everything that has mass and volume is matter.

• Mass is the amount of matter of an object. It's measured in kilograms (kg) using a scale.

Garfield is using a scale!

• Volume is measured in litres (l) . It's the space that an object takes up. We use a jug.

This is a jug!

New vocabulary!

Can you pronounce all these words?

Experiments

Types of energy

You can print this mindmap to study for the exam

Energy changes

One type of energy can be transformed into another one. 

In this video you will see how kinetic energy (from falling water) is transformed into electricity.

In this one, light energy (from the sun) changes into heat energy (we burn a paper!!)

Watch these videos please!!

Types of energy!

Kinetic energy: produced by things in movement.

Light energy: the sun, the stars, a light bulb, fire...

Electric energy: electric devices use electric energy. A computer, a tv, a phone, a radio, a machine...

Heat energy: something is hot!!!!

Chemical energy: is stored in food, wood, petroleum, gas, oil...

Sound energy: this energy produces sound. A guitar, a piano, a person clapping hands, somebody singing...