States of Matter and Phase Changes

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties. An example is rust forming on a bicycle.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. An example is salt dissolving in water.

Front

What happens to particles in an object at higher temperatures?

Back

Particles in an object move faster at higher temperatures due to increased energy.

Front

What is the process called when a liquid turns into a solid?

Back

The process of a liquid turning into a solid is called freezing.

Front

What is oobleck and how does it react to sudden impacts?

Back

Oobleck is a non-Newtonian fluid that becomes more solid when sudden force is applied.

Front

What is the definition of freezing?

Back

Freezing is the process of a liquid turning into a solid as it loses heat.

Front

What is the definition of melting?

Back

Melting is the process of a solid turning into a liquid when it gains heat.

Front

What is sublimation?

Back

Sublimation is the process where a solid changes directly into a gas without becoming a liquid first, like dry ice.

Front

What is evaporation?

Back

Evaporation is the process where liquid turns into vapor, usually at the surface of the liquid.

Front

What is condensation?

Back

Condensation is the process where vapor turns back into liquid, often seen as water droplets on a cold surface.