M-Step Science Practice

Which of the following is a matter phase in which the molecules of a substance fill whatever size container they are placed in?

• liquid

• gas

• solid

• all of these

What state of matter is best represented by the diagram?

• liquid

• solid

• gas

• all of these

Yuki has a bowl of ice. She places the ice in a warm room and watches as it melts into liquid water. Yuki then places the liquid water over a Bunsen burner and heats it until it vaporizes. How does the temperature of the vaporized gas compare to the temperature of the solid ice that Yuki began with?

• The temperature of the vaporized gas is higher than the temperature of the solid ice.

• The temperature of the vaporized gas is lower than the temperature of the solid ice.

• The temperature of the vaporized gas is the same as the temperature of the solid ice.

• The temperature difference cannot be determined because phase changes are not related to temperature.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

True or false. Gas particles never touch each other.

• True; gas particles move too rapidly to ever touch.

• False; gas particles are constantly touching each other.

• False; gas particles can touch each other when they collide.

• True; gas particles are located too far apart to ever touch.

A sample of a gaseous substance changes into liquid.

This process is called _________ and it takes place when heat is _________ a gaseous system.

• condensation; added to

• vaporization; removed from

• vaporization; removed from

• condensation; removed from

Tags

NGSS.MS-PS1-4

What must occur in order for matter to change states?

• A chemical change must occur.

• Heat must be added or removed.

• The matter must change.

• Other substances must be added.

Tags

NGSS.MS-PS1-4

The atoms of gaseous helium are

• far apart, moving fast, and bouncing off the container walls.

• close together, moving around one another.

• close together, vibrating in a rigid structure.

• not moving at all.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Which of the following states of matter has a definite shape?

• solids only

• liquids only

• liquids and gases only

• solids and liquids only

When liquid lemonade is placed in the freezer, its temperature slowly drops. Its molecules move less and less until they can only vibrate in a rigid structure. Another way to describe this process is that thermal energy is __________ the lemonade causing it to become a __________.

• cooling; liquid

• heating; solid

• freezing; solid

• freezing; liquid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The diagram shows heat being removed from a substance, causing

• it to form a liquid as its particles move farther apart

• it to form a liquid as its particles more closer together

• it to form a solid as its particles move farther apart

• it to form a gas as its particles more closer together

Tags

NGSS.MS-PS1-4