Exploring Chemical Change Indicators/Unbalanced Forces

Front

What are the two main factors that determine the amount of friction between two objects?

Back

Force and roughness between surfaces.

Front

What is an example of friction that is helpful?

Back

Brakes used on a bike, tires from a car on the road, and tread on the bottom of your shoes are all examples that are helpful.

Front

What is a key difference between physical and chemical changes?

Back

Physical changes do not alter the chemical composition, while chemical changes do.

Front

What happens when sugar dissolves in water?

Back

It is a physical change.

Front

Is copper tarnishing a physical or chemical change?

Back

It is a chemical change.

Front

What is friction?

Back

Friction is the resistance that one surface or object encounters when moving over another.

Front

What are unbalanced forces?

Back

Unbalanced forces are forces that cause an object to move or change its motion.

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

Can physical changes be reversed?

Back

Yes, physical changes can often be reversed.