Chen: Grade 2 - Changes from Heat

Front

What is heating?

Back

Heating is the process of increasing the temperature of an object or substance.

Front

What is cooling?

Back

Cooling is the process of decreasing the temperature of an object or substance.

Front

What happens to water when it freezes?

Back

Water changes from a liquid to a solid.

Front

What happens to ice when it melts?

Back

Ice changes from a solid to a liquid.

Front

What is melting?

Back

Melting is the process of changing a solid into a liquid by adding heat.

Front

What is freezing?

Back

Freezing is the process of changing a liquid into a solid by removing heat.

Front

What happens to a candy bar on a hot day?

Back

It melts and changes from solid to liquid.

Front

What happens to butter when it is cooled?

Back

Melted butter solidifies when cooled.

Front

What is a reversible change?

Back

A reversible change is a change that can be undone, returning to the original state.

Front

What is an example of a reversible change?

Back

Making popsicles from juice is a reversible change.