Stickler Week 14

Front

What is friction?

Back

Friction is a force that acts in the opposite direction of movement.

Front

What does concentration mean in a solution?

Back

Concentration is the amount of material dissolved in a measure of liquid.

Front

Which solution is more concentrated: 500 mL of water with 100 g of salt or 500 mL of water with 90 g of salt?

Back

500 mL of water with 100 g of salt is more concentrated.

Front

What type of change is melting ice?

Back

Melting ice is a physical change.

Front

What type of change is burning wood?

Back

Burning wood is a chemical change.

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

Give an example of a physical change.

Back

An example of a physical change is freezing water to make ice.

Front

Give an example of a chemical change.

Back

An example of a chemical change is rust forming on iron.

Front

What happens to the particles in a substance during a physical change?

Back

The particles in a substance may change their arrangement but not their chemical structure.