Unit Resources Lesson

Why does solid water (ice) float when placed in liquid water?

• Ice is less dense than liquid water

• Ice is more dense than liquid water

• Ice has less mass than the water in which it is floating

• Ice has less volume than the water in which it is floating

Jada and Brian are using a Venn diagram to organize the information they learned about solids, liquids, and gases. What should they write where all of the states overlap at position 7?

• Particles are spaced far apart.

• Particles are constantly moving.

• Shape depends on the container.

• Sample does not take shape of the container.

A solid sample of oil is warmed until it turns into a liquid. Which property of the oil will decrease?

• density

• volume

• kinetic energy

• thermal energy

Tags

NGSS.MS-PS1-4

Which statement explains why a rock does not sink in a lake that is frozen over?

• Particles in a solid are fixed in place.

• Particles are much harder in a solid than in a liquid.

• Particles are much closer together in a solid than in a liquid.

• Particles in a solid are moving too fast for anything to penetrate them.

Tags

NGSS.MS-PS2-5

Ana is creating models to show atoms of solid bromine, liquid bromine, and gaseous bromine. How should her three models differ?

• The size of the atoms should vary depending on the state.

• The mass of the atoms should vary depending on the state.

• The motion of the atoms should vary depending on the state.

• The identity of the atoms should vary depending on the state.

Tags

NGSS.MS-PS1-4

Deval drew models of particles in a substance.

Which model best represents the particles in a solid?

• Model A

• Model B

• Model C

• Model D

Deval drew models of particles in a substance.

Which diagram most likely represents the state in which particles are moving fastest?

• Model A

• Model B

• Model C

• Model D

Tags

NGSS.MS-PS1-4