Particle Motion

Which of the pictures demonstrates a state of matter without a fixed shape or fixed volume?

• J

• K

• L

• M

In which state of matter are the molecules spaced farthest apart?

• Solid

• Liquid

• Gas

• All are equal

Which of the pictures demonstrates a state of matter with a fixed shape and a fixed volume?

• J

• K

• L

• M

Which statement correctly describes both gases and liquids?

• Their shapes stay the same in any container.

• Their shapes change when they are in different containers.

• Their volumes stay the same in any container.

• Their volumes change when they are in different containers.

What best explains the reason solids have a definite shape and volume?

• the molecules in solids move past each other easily.

• the molecules in solids stay in a definite location and vibrate

• the molecules in solids move freely in all directions.

• the molecules in solids do not move at all.

Brian's family has a compost pile at home. They put all the weeds they pull up from the garden in it as well as any vegetable waste they gather from the kitchen. If they keep it moist, all this vegetation will eventually turn into organic soil by the chemical process of decay. Since decay involves a variety of chemical reactions, how might temperature affect the rate at which the compost turns into soil?

• Temperatures near freezing would make it speed up.

• It would happen faster at warmer air temperatures.

• Changing temperatures would not affect the chemical reactions.

• Warm summer air temperatures would make it slow down.

State of matter with a definite volume, but no definite shape.

• solid

• liquid

• gas

State of matter with a definite shape and definite volume.

• solid

• liquid

• gas

State of matter with no definite shape and no definite volume.

• solid

• liquid

• gas

Basic state of matter with the greatest amount of energy.

• solid

• liquid

• gas