8.p.8.1 Particle Motion

Which picture illustrates a state of matter without a fixed shape or fixed volume?

• J

• K

• L

• M

Tags

NGSS.MS-PS1-4

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

• Solid

• Liquid

• Gas

• All are equal

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.

Why do solids have a fixed 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.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which state of matter has no definite shape and no definite volume?

• solid

• liquid

• gas

What state of matter has the greatest amount of kinetic energy?

• solid

• liquid

• gas

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What happens to particles when their temperature increases?

• The particles move slower

• The particles move faster

• The particles lose mass

• The particles gain mass

Tags

NGSS.MS-PS1-4

Based on the image, what could be inferred about the motion of particles at higher temperatures?

• particles in an object have less energy
• particles in an object move faster
• a gas contracts

Tags

NGSS.MS-PS1-4

Based on the image, what can be inferred about the particles of a liquid?

• are tightly packed together and stay in a fixed position.

• are free to move around one another but still touch.