G8 Science Practice Assessment

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.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

Front

What is the smallest unit of matter?

Back

The smallest unit of matter is an atom.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change.

Front

What is an example of a chemical change?

Back

Rust forming on iron is an example of a chemical change.

Front

What is pH?

Back

pH is a measure of how acidic or basic a solution is.

Front

What pH value indicates acid rain?

Back

A pH value below 5.5 indicates acid rain.

Front

What happens to the particles in a solid?

Back

In a solid, particles are closely packed together and vibrate in place.

Front

What happens to the particles in a liquid?

Back

In a liquid, particles are close together but can move past one another.

Front

What happens to the particles in a gas?

Back

In a gas, particles are far apart and move freely.