5.PS1.2 Conservation of Matter 5th Grade TNReady #2

Front

What is the Law of Conservation of Matter?

Back

The Law of Conservation of Matter states that matter cannot be created or destroyed in a closed system; it can only change forms.

Front

What happens to the mass of an object when it changes state (e.g., solid to liquid)?

Back

The mass remains the same; it is conserved.

Front

What is mass?

Back

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

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

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

Give an example of a physical change.

Back

Melting ice is an example of a physical change; the ice changes from solid to liquid but remains water.

Front

What is a chemical change?

Back

A chemical change occurs when a substance transforms into a different substance with different properties.

Front

Give an example of a chemical change.

Back

Burning wood is a chemical change; it turns into ash and smoke, which are different substances.

Front

What is the state of matter?

Back

The state of matter refers to the distinct forms that different phases of matter take on, such as solid, liquid, and gas.

Front

How does temperature affect the state of matter?

Back

Increasing temperature can cause solids to melt into liquids and liquids to evaporate into gases.