Year 8 - Forces and Fields Quiz

What is force?

• A push exerted on an object

• A push, pull or twist exerted on an object

• A pull exerted on an object

• Nothing

If an object is not moving the forces acting on it must be ...................

• Balanced

• Unbalanced

A force that acts where two objects touch is called a .......................

• Contact Force

• Non-contact Force

• Balanced Force

• Unbalanced Force

A force acting in the opposite direction to which the object is moving is called ............................

• Gravity

• Buoyancy

• Friction

• Normal

The sum of all the forces acting on an object and the direction it is moving is called the ...............................

• Contact Force

• Balanced Force

• Unbalanced Force

• Net Force

A soft metal core that becomes magnetic when an electric current passes through the coils around the core is called an .........................

• Magnet

• Electromagnet

• Electricity

• Copper Wire

Which of the following is an example of a contact force?

• A magnet picking up safety pins

• The moon orbiting Earth

• Kicking a ball across the lawn

To increase the strength of an electromagnet you should ................................

• Increase the number of coils

• Increase the voltage of the battery

• Both of the above

How are electromagnets different from magnets?

• Magnets can be turned on/off

• You can turn an electromagnet on/off

• Magnets are more powerful

• Magnets have a North and South pole

Surrounding every magnet is a __________ __________.

• magnetic field

• electrical current

• another magnet