Mod J Unit 2 Lesson 2 Changes of State

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

• loss of energy and increased freedom of particle motion

• gain of energy and increased freedomeof particle movement

• loss of energy and decreased freedom of particle motion

• gain of energy and decreased freedome of particle motion

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NGSS.MS-PS1-4

Addison warms a pure, solid substance in a system closed off from the surroundings. He listed the changes in temperature over time and the physical state of the substance. Which of these could represent the missing values in Addison’s data table?

• X = 50, Y= 100,

  Z = 50

• X = 50 , Y = 100,

  Z = 150

• X = -50, Y = -100

  Z = -50

• X = -50, Y = -100

  Z = -150

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NGSS.MS-PS1-4

Frost forms when water vapor changes directly from a gas to ice in a process called deposition. If you were to model the water particles before and after deposition, how would they compare?

• Before deposition, the particles vibrate in place; after deposition, they slide by each other.

• Before deposition, the particles slide by each other; after deposition, they vibrate in place.

• Before deposition, the particles vibrate in place; after deposition, they move quickly in all directions.

• Before deposition, the particles move quickly in all directions; after deposition, they vibrate in place.

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NGSS.MS-PS1-4

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.

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

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 gas.

• The substance changed from a gas to a liquid.

• The substance changed from a liquid to a solid.

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NGSS.MS-PS1-4

Look at the photo. Sweating is one way the body cools itself. Which statement best explains this cooling process?

• Water condenses on the skin, adding thermal energy to the body.

• Moisture from the body evaporates from the skin, removing thermal energy from the body.

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NGSS.MS-PS1-4

Which situations model a process similar to sweating? Select two (2) that apply.

• water droplets forming on the outside of a glass of ice water

• a wet bandana around the neck of a hiker

• wet clothes hanging on a clothes line

• a hot, moist towel placed on sore muscles to soothe them

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NGSS.MS-PS3-5

Which weather conditions would most likely create the fog as shown in the photo?

• rapidly cooling air that is low in water vapor

• rapidly cooling air that is high in water vapor

• rapidly warming air that is low in water vapor

• rapidly warming air that is high in water vapor

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NGSS.MS-ESS2-4

NGSS.MS-ESS2-5

Clouds and fog form under similar conditions. How might air pressure at higher altitudes affect the formation of clouds? Select the word that completes the explanation.

• As air rises, the reduced pressure allows the air to expand and cool until water vapor FREEZES into water droplets that form the clouds.

• As air rises, the reduced pressure allows the air to expand and cool until water vapor CONDENSES into water droplets that form the clouds.

• As air rises, the reduced pressure allows the air to expand and cool until water vapor EVAPORATES into water droplets that form the clouds.

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NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

As snow slowly melts in the sunshine, what is happening to the particles of water that make up the snow? Select two (2) that apply.

• Particles are gaining energy.

• Particles are changing from liquid to solid.

• Particle motion is increasing.

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NGSS.MS-PS1-4

NGSS.MS-PS3-5