4º. U. 5. Matter and energy

It refers to how difficult a material is to scratch (rayar) and change shape.

• Colour

• Hardness

• Resistance

• Elasticity

Wind, sunlight and water are renewable sources of energy.

• True

• False

It's the relationship between the mass and volume of an object.

It is a substance made up of two or more pure substances:

They can come from animals, plants or minerals.

• Natural

• Manufactured

• Conductors

• Insulators

Non-renewable energy sources are unlimited and will never run out.

• True

• False

Some materials return to their original shape after you stretch them and others do not.

• Colour

• Hardness

• Resistance

• Elasticity

Materials that DON'T allow electricity to pass through them are called thermal ......

It refers to how difficult a material is to break.

• Colour

• Hardness

• Resistance

• Elasticity

When water is cooled, it becomes ice (solid).

• Solidification

• Melting

• Evaporation

• Condensation