Question 1

Weight is an example of which quantity?

Accepted Answer

force

Answer

speed

Answer

momentum

Answer

acceleration

Question 2

Which form of energy is used to make electrical energy in tidal power stations?

Accepted Answer

gravitational energy

Answer

nuclear energy

Answer

chemical energy

Answer

internal energy (thermal)

Question 3

Which statement is explained by reference to pressure?

Accepted Answer

Spikes on running-shoes sink into the ground.

Answer

One kilogram of water occupies more volume than one kilogram of lead.

Answer

Water cooled to a low enough temperature turns to ice.

Answer

Objects with greater mass have greater weight.

Question 4

Small smoke particles suspended in air are viewed through a microscope.
The smoke particles move randomly.
What does this show?

Accepted Answer

The air consists of fast-moving molecules.

Answer

The temperature of the air is increasing.

Answer

The pressure of the air is increasing.

Answer

There are convection currents in the air.

Question 5

The gas in a container is heated but is kept at constant volume.
Why does the gas pressure increase?

Accepted Answer

The molecules move more rapidly.

Answer

The molecules increase in mass.

Answer

The molecules move further apart.

Answer

The molecules expand.

Question 6

One method of heat transfer involves the energy travelling at a much greater speed than in other
methods.
 What is the name of this method?

Accepted Answer

radiation

Answer

evaporation

Answer

conduction

Answer

convection

Question 7

The thermal capacity of solid Y is greater than that of solid Z.
What is a consequence of this?

Accepted Answer

Solid Y needs more thermal energy to raise its temperature by 1°C than solid Z.

Answer

Solid Y needs less thermal energy to melt it than solid Z.

Answer

Solid Y needs less thermal energy to raise its temperature by 1°C than solid Z.

Answer

Solid Y needs more thermal energy to melt it than solid Z.

Question 8

What can be heard by the human ear?

Accepted Answer

an insect emitting a wave of frequency 300Hz

Answer

a vibrating spring emitting a wave of frequency 5Hz

Answer

a bat emitting a wave of frequency 30kHz

Answer

a whistle emitting a wave of frequency 50kHz

Question 9

Which action will demagnetise a magnetised piece of steel?

Accepted Answer

Hit it repeatedly with a hammer.

Answer

Cool it in a freezer for several hours.

Answer

Put it in a coil carrying a direct current (d.c.).

Answer

Put it near an unmagnetised piece of iron.

Question 10

In an electrical circuit, what is the purpose of a fuse?

Accepted Answer

to cut off the electrical supply if the current is too large

Answer

to connect the metal case of an appliance to the earth

Answer

to keep an electrical appliance dry in damp conditions

Answer

to maintain a steady voltage as the current varies

Question 11

Which particles are emitted during thermionic emission?

Accepted Answer

electrons

Answer

neutrons

Answer

atoms

Answer

protons

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