Pressure is the _____ per unit area.

Select the correct units for pressure.

• N

• N/m²

• Pa

• m/s

Temperature is the average _______ energy of the particles in a substance.

The temperature at which particles have no kinetic energy is called ________ ____.

To change from degrees Celsius to Kelvin you add ___.

A piece of tin is at a temperature of 3.7°C. State the value of this temperature in Kelvin.

Increasing the temperature of a gas will _______ the pressure it exerts.

• increase

• decrease

• not affect

Why does increasing the temperature of a gas increase the pressure it exerts?

• It increases the number of particles in the gas.

• It increases the speed of collisions between the particles and the container.

• It increases the size of the particles in the gas.

• It increases the number of collisions between the particles and the container.

If the temperature of a gas is kept constant but the volume is decreased, the pressure will _______.

• increase

• decrease

• remain constant

If the volume of a gas is kept constant but the temperature is decreased, the pressure will _______.

• increase

• decrease

• remain constant