Unit 4 Science Physical & Chemical Changes

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 rusting, burning, and mixing vinegar with baking soda.

Front

How do you measure the volume of an irregular solid?

Back

You use a graduated cylinder and record the change in water level when the solid is submerged.

Front

What is weight?

Back

Weight is the force exerted by gravity on an object, measured in newtons.

Front

What is mass?

Back

Mass is the amount of matter in an object, measured in grams or kilograms, and it remains constant regardless of location.

Front

What instrument is used to measure weight?

Back

A balance is used to measure weight.

Front

What is the unit of measurement for weight?

Back

The unit of measurement for weight is newtons.

Front

What happens when vinegar is poured on food?

Back

It causes a chemical change.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object and does not change with location, while weight is the force of gravity on that mass and can change depending on the gravitational pull.

Front

What is a graduated cylinder used for?

Back

A graduated cylinder is used to measure the volume of liquids accurately.