Exploring the Phases of Matter

The video explores the phases of matter: solid, liquid, and gas, and how energy influences phase changes. It includes experiments with liquid nitrogen to demonstrate molecular behavior at different temperatures and explains the concept of absolute zero. Practical experiments are shown to illustrate these scientific principles, making the learning engaging and interactive.

What are the three phases of matter?

• Solid, Gas, Plasma

• Liquid, Gas, Plasma

• Solid, Liquid, Gas

• Solid, Liquid, Plasma

What is the main factor that causes matter to change phases?

• Pressure

• Mass

• Energy

• Volume

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

What happens to the atoms in solid steel compared to liquid steel?

• They disappear

• They stay the same

• They move slower

• They move faster

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is required to change a liquid into a solid?

• Decrease pressure

• Add energy

• Remove energy

• Increase pressure

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NGSS.MS-PS1-4

Why does liquid nitrogen boil at room temperature?

• It is very cold

• It is under high pressure

• It is very hot

• It is under low pressure

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What percentage of our air is nitrogen?

• 78%

• 100%

• 50%

• 21%

What is absolute zero?

• The temperature at which water freezes

• The temperature at which molecular motion stops

• The temperature at which water boils

• The temperature at which nitrogen boils

Why can't we reach absolute zero?

• There is always some source of heat

• It is too hot

• It is too cold

• It is impossible to measure

What happens to the pressure in a ball when it is placed in a dry ice bath?

• It increases

• It decreases

• It stays the same

• It fluctuates

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What phase change occurs when solid carbon dioxide is placed in warm water?

• Gas to liquid

• Liquid to gas

• Solid to gas

• Solid to liquid

Tags

NGSS.MS-PS1-4