Change of State

Mercury metal is a liquid at room temperature. As energy in the form of heat is added to liquid mercury, the temperature rises until it reaches its boiling point at 357 ºC. The temperature remains at this level until all the liquid has changed to gas, after which the temperature of the gas begins to rise again. Why the temperature of the mercury did not rise while it was boiling.

• The energy being added while boiling was being used to overcome forces and change the mercury from liquid to gas

• The energy being added while boiling was being used to heat the mercury

• The energy being added while boiling evaporated the mercury. Since no mercury was left temparture did not change

Tags

NGSS.MS-PS1-4

What happens to the particles of a substance when it changes from a liquid to a gas?

• The particles move closer together and move more slowly

• The particles move farther apart and move more slowly

• The particles move closer together and move more quickly

• The particles move farther apart and move more quickly

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the process called when a gas changes into a liquid?

• Sublimation

• Condensation

• Evaporation

• Freezing

Tags

NGSS.MS-PS1-4

What is the process called when a liquid changes into a solid?

• Sublimation

• Condensation

• Evaporation

• Freezing

Tags

NGSS.MS-PS1-4

Which phrase describes the changes that take place in a gas when it condenses?

• loss of energy and increased freedom of particle motion

• gain of energy and increased freedom of particle motion

• . loss of energy and decreased freedom of particle motion

• gain of energy and decreased freedom of particle motion

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which energy transfer takes place when water freezes to form ice crystals in the atmosphere?

• Energy is transferred from the air into the water

• Energy is transferred from the water into the air

• Energy is transferred from the water into the ground

• Energy is transferred from warmer ice crystals to colder ones

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Energy in the form of heat was applied to a beaker containing a certain substance. The particles of the substance began to move farther apart until they were arranged as shown by the arrow in the diagram. What change of state occurred to the substance in the beaker?

• The substance changed from a gas to a solid.

• The substance changed from a liquid to a solid

• The substance changed from a gas to a liquid

• The substance changed from a liquid to a gas.

Tags

NGSS.MS-PS1-4

When thermal energy is removed from a substance, the substance may condense or freeze. But when something loses energy, that energy is not “lost.” The energy is transferred to something else. When the lava cools, where is the the thermal energy transferred? Select all that apply.

• Some thermal energy is transferred from the lava to the air.

• Some thermal energy is transferred from the lava to the ground.

• Some thermal energy is transferred from the lava to the water.

• Some thermal energy is transferred to the new solid rock that forms.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Clouds and fog form under similar conditions. Air pressure at higher altitudes affects the formation of clouds. As air rises, the reduced pressure allows the air to expand and cool until water vapor changes into water droplets that form the clouds. What is the process which facilitates this change?

• evaporation

• condensation

• freezing

• melting

Tags

NGSS.MS-ESS2-4

As snow slowly melts in the sunshine, what is happening to the particles of water that make up the snow? Select all that apply.As snow slowly melts in the sunshine, what is happening to the particles of water that make up the snow? Select all that apply.

• Particles are gaining energy.

• Particle motion is decreasing.

• Particle motion is increasing.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5