What is the main focus of the video?

• The behavior of gases

• Phase changes and their microscopic details

• Chemical reactions

• The periodic table

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What does the x-axis represent in a phase change diagram?

• Temperature

• Pressure

• Time

• Volume

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At what temperature does water start to melt?

• 100 degrees Celsius

• 50 degrees Celsius

• 0 degrees Celsius

• 25 degrees Celsius

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What happens to the temperature during a phase change?

• It fluctuates

• It increases

• It decreases

• It remains constant

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What is the term for the phase change from gas to liquid?

• Condensation

• Sublimation

• Freezing

• Melting

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How are particles arranged in a solid?

• Loosely packed and unorganized

• Tightly packed and organized

• Far apart and unorganized

• Loosely packed and organized

What does temperature influence during a phase change?

• The color of the substance

• The volume of the substance

• The speed of particles

• The interactions between particles

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NGSS.MS-PS1-4

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What can temperature do when a substance is in a set phase?

• Change the phase

• Change the speed of particles

• Change the volume

• Change the color

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NGSS.MS-PS1-4

What is the role of energy during a phase change?

• To alter the speed of particles

• To change the phase of the substance

• To increase the volume

• To change the color of the substance

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What should you think about when you see a lake freezing over?

• The volume of the lake

• The color of the ice

• The temperature remaining constant

• The speed of the particles

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NGSS.MS-PS1-4

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