Gas pressure and temperature

Question 1

the pressure of a gas is caused

Answer 1

the random impacts of gas molecules on surfaces that are in contact with the gas

Question 2

if the temp of a gas in a sealed container is increased, the pressure of the gas increases because

Answer 2

• the molecules move faster so they hit the surface with more force
• the number of impacts per second of gas molecules on the surface of a sealed container increases, so the total force of the impacts increase

Question 3

the unpredictable motion of smoke particles is evidence of

Answer 3

the random motion of gas molecules