Unit 9 Machines around you

Forces can be _________ and __________ forces

• push

• attraction

• pull

• repel

There are contact and non-contact forces.

• True

• False

Forces can change object´s shape or size and to move the object.

• True

• False

Gravity is a ____________ force.

• contact force

• repel force

• non-contact force

• repulsion force

Magnetism is a ____________ force.

• contact force

• repel force

• non-contact force

• repulsion force

Gravity is an invisible force that attract or repel objects wit electric charges.

• True

• False

Magnetism is an invisible force that pulls objects towards the centre of the Earth.

• True

• False

Machines make the work____________

• harder

• alone

• easier

• comfortable

Machines help to do the work slower adn with more energy.

• True

• False

Machines need energy to work. Sometimes can be ___________________ or ____________________.

• human energy

• fire energy

• electric energy

• light energy