PMA 2 Review

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. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include burning, rusting, and souring.

Front

Which of the following is NOT a physical change: Mixing concrete, Melting ice, Burning wood, Tearing paper?

Back

Burning wood is NOT a physical change; it is a chemical change.

Front

What is weight?

Back

Weight is the gravitational force acting on an object, typically measured in newtons or pounds.

Front

What carries no charge?

Back

Neutrons carry no charge.

Front

Which of the following is NOT a chemical change: Sour milk, Burning wood, Breaking a pencil, Rust?

Back

Breaking a pencil is NOT a chemical change; it is a physical change.

Front

Which of the following is NOT a physical change: Crumpled paper, Pencil sharpening, Shrunken clothing, Sour milk?

Back

Sour milk is NOT a physical change; it is a chemical change.

Front

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

Back

A physical change affects physical properties without changing the substance's composition, while a chemical change results in new substances being formed.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice.

Front

What is an example of a chemical change?

Back

An example of a chemical change is rusting iron.