Particles in Motion

What types of gases make up air?

• just oxygen

• Nitrogen, Oxygen, CO2, H2O

• just hydrogen and oxygen

• mostly CO2 and H2O

How do air particles move?

• roll over and around other particles

• bonded together

• vibrate in place

• fly through space as individual particles

What is the density of the particles in an open bottle compared to the density of the particles outside the bottle?

• more dense outside

• more dense inside

• the same

• less dense outside

How fast do air particles move at room temperature?

• 1 quintillion/sec

• 1 m/second

• 300 m/second

• 800 m/second

What is kinetic energy?

• solar energy

• potential energy

• energy of motion

• energy of gases

How often does an air particle crash into something else?

• they don't crash into anything

• 10 billion times/ second

• 1 time/second

• 5 million times / second

What does the amount of kinetic energy an object has depend upon?

• mass and speed

• volume and particles

• mass

• speed

How can you change the kinetic energy of an object?

• change gravity

• change its mass

• you can't change kinetic energy

• change its speed

What happens to the kinetic energy when a bottle and balloon system is placed in a cup of hot water?

• no change

• decreases

• increases

• slows down

What happens to the air particles when kinetic energy increases?

• they move faster

• they move slower

• they stop

• no change