9J More electricity

An object’s weight:

• is caused because it is pulled towards the Earth.

• is caused by the Earth’s magnetic field.

• is caused by the air pushing down on it.

• stays the same, even if its mass changes.

The direction ‘down’ is:

• the same everywhere.

• at right angles to the ground.

• towards the centre of the Earth.

• different under water.

Which statement is not true?

• The Earth attracts objects because it has a large mass.

• You are attracting your pen with a small force of gravity.

• Only large objects like the Earth produce a force of gravity.

• Your body is attracting the Earth.

A bag of sugar has a mass of 1 kg. What is its weight?

• 1 N

• 10 N

• 10 kg

• 0.1 N

Gravity is less on the Moon than on the Earth because:

• the Moon is smaller than the Earth.

• the Moon has a bigger mass than the Earth.

• the Moon is bigger than the Earth.

• the Moon has less mass than the Earth.

On Mars, the strength of gravity is 9 N/kg. If your mass is 50 kg, how much would you weigh on Mars?

• 450 N

• 90 N

• 50 N

• 45 N

Gravity:

• gets less if two objects get closer together.

• gets bigger if two objects get further apart.

• gets less if two objects get further apart.

• does not depend on distance.

The units for voltage are:

• amps.

• ohms.

• volts.

• metres.

Voltage is:

• another name for current.

• a way of counting how many cells there are in a circuit.

• a way of saying how much energy is being pushed around the circuit.

• something that makes it difficult for electricity to flow.

Which statement is not true for a series circuit?

• The voltage is always the same for all the components.

• The voltage across each component depends on how much energy it uses.

• The voltage across all the components adds up to the voltage across the cell.

• The voltage can be measured using a voltmeter.