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Which statement best identifies which of these models above represents a gas? (SC.8.P.8.1.)

• Diagram B is a gas, because its particles move more slowly and are farther apart.

• Diagram A is a gas, because its particles move more slowly and are closer together.

• Diagram B is a gas, because its particles move more quickly and are farther apart.

• Diagram A is a gas, because its particles move more quickly and are closer together.

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Which statement best identifies the movement of the particles in a liquid? (SC.8.P.8.1.)

• The particles of a liquid move freely.

• The particles of a liquid slide past each other.

• The particles of a liquid vibrate and barely move.

• The particles of a liquid do not move at all.

Which statement best identifies which of these models above represents a solid? (SC.8.P.8.1.)

• Diagram A is a solid, because its particles barely move and are tightly packed

• Diagram B is a solid, because its particles barely move and are farther apart.

• Diagram A is a solid, because its particles move more quickly and are farther apart.

• Diagram B is a solid, because its particles move more quickly and are tightly packed.

Which statement best identifies which of these models above is a liquid? (SC.8.P.8.1)

• Diagram A is a liquid, because its particles move the slowest and are tightly packed.

• Diagram B is a liquid, because its particles move at a medium speed, and are sliding past each other.

• Diagram C is a liquid, because its particles move the fastest and bounce all over the place.

• A. Diagram A and B are both liquids, because the particles are always touching.

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1. How does the picture above relate to the particles in a solid? (SC.8.P.8.1)

• The cars are driving fast and switching lanes like the particles in a solid.

• The cars are sliding past each other while driving the speed limit like the particles in a solid.

• The cars are moving so fast you cannot even see them like the particles in a solid.

• The cars are barely moving like the particles in a solid.

What is true of all physical changes? (SC.8.P.11.1)

• A new substance is formed.

• A substance is altered in size, shape or form.

• Something has to break.

• Something has to be folded.

The diagram below shows a glass containing a liquid and ice cubes. What type of change does this represent? (SC.8.P.11.1)

• Freezing

• Chemical change

• Physical change

• Evaporation

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When the process of melting happens, what is happening with the molecules and the phase change? (SC.8.P.11.1)

• The molecules are speeding up turning a solid into a liquid.

• The molecules are slowing down turning a solid into a liquid.

• The molecules are speeding up turning a liquid into a solid.

• The molecules are slowing down turning a liquid into a solid.

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When the process of condensation happens, what is happening with the molecules and the phase change? (SC.8.P.11.1)

• The molecules are speeding up turning a liquid into a gas.

• The molecules are slowing down turning a liquid into a gas.

• The molecules are speeding up turning a gas into a liquid.

• The molecules are slowing down turning a gas into a liquid.

Tags

NGSS.MS-PS1-4

What happens when you add energy to a liquid? (SC.8.P.11.1)

• Melting and it will turn into a solid.

• Freezing and it will turn into a solid.

• Evaporation and it will turn into a gas.

• Condensation and it will turn into a gas.

Tags

NGSS.MS-PS1-4