Exploring the Phases of Matter

This video tutorial covers the phases of matter and how to determine the phase based on temperature. It explains the difference between chemical and physical changes, emphasizing that phase changes are physical changes. The video details the concepts of boiling and melting points, and how these intrinsic properties help determine the phase of a substance at a given temperature. Examples are provided to illustrate how to use these points to identify whether a substance is a solid, liquid, or gas.

What is the main difference between a chemical change and a physical change?

• Neither chemical nor physical changes alter the chemical composition.

• Both chemical and physical changes alter the chemical composition.

• Physical changes alter the chemical composition, while chemical changes do not.

• Chemical changes alter the chemical composition, while physical changes do not.

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NGSS.MS-PS1-4

In a particle diagram, what does a physical change typically involve?

• The destruction of existing particles.

• The creation of new particles.

• A rearrangement of particles without changing their chemical composition.

• A change in the chemical composition of the particles.

How can phase changes be represented in chemical notation?

• By adding new elements to the formula.

• By removing elements from the formula.

• By using letters in parentheses to denote the phase.

• By changing the chemical formula.

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NGSS.MS-PS1-4

What type of change is a phase change?

• Chemical change

• Physical change

• Both chemical and physical change

• Neither chemical nor physical change

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the boiling point of a substance?

• The temperature at which a substance turns from a gas to a liquid.

• The temperature at which a substance turns from a solid to a liquid.

• The temperature at which a substance turns from a liquid to a gas.

• The temperature at which a substance turns from a gas to a solid.

Tags

NGSS.MS-PS1-4

What is the melting point of a substance?

• The temperature at which a substance turns from a gas to a solid.

• The temperature at which a substance turns from a gas to a liquid.

• The temperature at which a substance turns from a solid to a liquid.

• The temperature at which a substance turns from a liquid to a gas.

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NGSS.MS-PS1-4

At what temperature does water boil at 1 atm?

• 0 degrees Celsius

• 200 degrees Celsius

• 50 degrees Celsius

• 100 degrees Celsius

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NGSS.MS-PS1-4

If a substance is at a temperature below its melting point, what phase will it be in?

• Gas

• Solid

• Liquid

• Plasma

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NGSS.MS-PS1-4

What phase would hydrogen be at 18 kelvin?

• Solid

• Plasma

• Liquid

• Gas

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What phase would lithium be at 2000 kelvin?

• Gas

• Liquid

• Plasma

• Solid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4