R-States of matter and Physical Changes Unit 5

Jason is comparing substances by investigating a ceramic cup with hot water inside and water vapor above the cup. What can he say about the motion of the particles in ALL of the substances? SC.8.P.8.1

• They do not move.

• They are always moving.

• The move past each other slowly.

• They move very fast in all directions.

In which state of matter are the particles able to move around one another? SC.8.P.8.1

• Gases only

• Liquids only

• Gases and liquids only

• Gases, liquids, and solids

Ben wants to model how the motion of particles changes with temperature. He considers water in an iron pot. Ben draws a model to show how the water particles and iron particles move at room temperature. Then he draws a second model to show how the water particles and iron particles move as the pot of water is heated. Based on this evidence, how should Ben’s second model differ from the first? SC.8.P.8.1

• The water particles should vibrate faster, and the iron particles should not move.

• Both the water particles and the iron particles should slide past each other faster.

• The water particles should slide past each other faster, and the iron particles should vibrate faster.

• The water particles should move freely in all directions, and the iron particles should slide past each other faster.

What term describes the state of matter in which the attractive forces between particles are the greatest? SC.8.P.8.1

• gas

• solid

• metal

• liquid

At room temperature, nitrogen is a gas and mercury is a liquid. Which claim describes how the particles of nitrogen gas compare to the particles of liquid mercury? SC.8.P.8.1

• The particles that make up nitrogen gas are expanding.

• The particles that make up nitrogen gas are closer together.

• The particles that make up nitrogen gas are moving more rapidly.

• The particles that make up nitrogen gas have greater attractive forces between them.

What happens to the particles of a liquid when energy is removed from them? SC.7.P.11.1

• The motion of the particles increases

• The motion of the particles stays the same.

• The distance between the particles increases.

• The distance between the particles decreases.

Which of the following occurs as ice turns into liquid water? SC.7.P.11.1

• New molecules are formed.

• A chemical reaction gives off heat.

• The mass of the sample increases.

• Energy is absorbed by the molecules.

What will be the effect on a cube of ice in a closed container left on a counter at room temperature for 30 minutes? SC.7.P.11.1

• The cube will continue to have the same shape and volume.

• The cube will melt and take on the shape and volume of the container.

• The cube will melt and take on the volume of the container, but not the shape.

• The cube will melt and take on the shape of the container, but not the volume.

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.

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.