2024 Chemistry Flashcard 1 Review

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Tags

NGSS.MS-PS1-1

Front

What is evaporation?

Back

Evaporation is the process by which a liquid turns into a gas, typically occurring at the surface of the liquid.

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NGSS.MS-ESS2-4

NGSS.MS-PS1-4

Front

How does temperature affect molecular movement?

Back

As temperature increases, the kinetic energy of molecules increases, causing them to move faster.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Front

What happens to molecules when they are heated?

Back

When molecules are heated, they gain energy and move more rapidly, which can lead to phase changes.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Front

Why do molecules move slower in cold water?

Back

Molecules move slower in cold water because lower temperatures result in decreased kinetic energy.

Tags

NGSS.MS-PS1-4

Front

What is the relationship between molecular movement and phase changes?

Back

Molecular movement is directly related to phase changes; increased movement can lead to transitions from solid to liquid (melting) or liquid to gas (evaporation).

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Front

What causes bubbles to form in a soap solution?

Back

Bubbles form in a soap solution because the soap molecules reduce the surface tension of water, allowing air to be trapped.

Front

What is surface tension?

Back

Surface tension is the elastic tendency of a fluid surface that makes it acquire the least surface area possible, caused by cohesive forces between liquid molecules.

Front

What is the significance of molecular proximity in liquids?

Back

In liquids, molecules are close together, allowing for interactions and reactions to occur more readily than in gases.

Front

How does the concept of density relate to molecular arrangement?

Back

Density is defined as mass per unit volume; in liquids, closely packed molecules result in higher density compared to gases where molecules are more spread out.