physical and chemical 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.

Front

What is a physical change?

Back

A physical change is a process that alters the form or appearance of a substance but does not change its chemical composition.

Front

Give an example of a chemical change.

Back

Burning wood is an example of a chemical change.

Front

Give an example of a physical change.

Back

An ice pack getting cold after being placed in the freezer is an example of a physical change.

Front

What are some signs of a chemical change?

Back

Signs of a chemical change include fizzing, foaming, color change, and the production of heat or light.

Front

Which of the following is NOT a physical change: crumpled paper, pencil sharpening, shrunken clothing, or rust?

Back

Rust is NOT a physical change; it is a chemical change.

Front

What happens to salt when it dissolves in water?

Back

When salt dissolves in water, it undergoes a physical change, as the salt can be recovered by evaporating the water.

Front

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

Back

A physical change affects the form of a substance, while a chemical change results in the formation of new substances.

Front

Is melting ice a physical or chemical change?

Back

Melting ice is a physical change.

Front

Is rusting of iron a physical or chemical change?

Back

Rusting of iron is a chemical change.