Matter is anything that has mass and takes up space.

Mass is the amount of matter in an object, usually measured in grams or kilograms.

When gases are heated, they expand.

When gases are cooled, they contract.

A convection current is a movement of fluid (liquid or gas) caused by differences in temperature and density.

No, tearing paper does not change its mass; the total weight remains the same.

The mass of the ice formed is the same as the mass of the water before it froze.

Add the weight of all ingredients together.

A metal ice cream scoop heats more quickly than a plastic scoop when dipped in warm water.

The principle states that mass cannot be created or destroyed in a closed system.