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.

Tags

NGSS.MS-PS1-4

Which state of matter will take both the volume and shape of the container that holds it?

• ice
• gas
• solid
• liquid

A student drew models of particles in a substance. Which model best represents the particles in a solid?

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Tags

NGSS.MS-PS1-1

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

A child is upset because his ice cream is melting. He thinks he now has less dessert. Which of these explanations correctly states why the child is incorrect?

• No mass is lost during a change of state.
• He actually has more, not less, ice cream.
• The mass will increase if he freezes the melted ice cream.
• Mass is lost only during certain changes of state, such as freezing.

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 a liquid.
• Particles are much closer together in a solid than a liquid.
• Particles in a solid are moving too fast for anything to penetrate them.

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

The illustration shows three different states of a substance. Which of these happens when the substance changes from the state shown in jar B to the state shown in jar A?

• The particles move more freely.
• The mass of the substance increases.
• The identity of the substance changes.
• The particles expand to fill their container.

Tags

NGSS.MS-PS1-4

The diagrams show the particle arrangement of the same material in three different states of matter. Which diagram most likely represents the state in which particles are moving fastest?

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• d. Particle speed is not related to state of matter.

Tags

NGSS.MS-PS1-4