Week 11 F&C Chemical and Physical Changes 2

What is a physical change?

• A change that creates a new substance

• A change where the substance stays the same but its form changes

• A change where heat is always produced

• A change that always involves rust

Which of the following is a chemical change?

• Milk turning sour

• Ice melting in a drink

• Breaking a piece of chalk

• Salt dissolving in water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When you tear a piece of paper into small pieces, what kind of change is it?

• Physical change

• Chemical change

• Both physical and chemical

• Neither

Which example shows a chemical change?

• Water freezing into ice

• Metal rusting over time

• Salt dissolving in water

• Breaking a pencil in half

Tags

NGSS.MS-PS1-2

What happens in a chemical change?

• A substance changes its size or shape, but not its chemical makeup

• Two or more substances combine, but they remain the same

• A new substance is formed, with different properties from the original

• The substance changes from solid to liquid

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is a physical change?

• Toasting bread

• Baking a cake

• Cutting a piece of string

• Frying an egg

If you mix vinegar and baking soda and bubbles form, what kind of change is this?

• Physical change

• Chemical change

• No change

• Only a temperature change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is NOT a sign of a chemical change?

• Change in color

• Formation of bubbles

• Change in state (solid, liquid, gas)

• Release of heat or light

Tags

NGSS.MS-PS1-2

When water boils and turns into steam, what type of change is occurring?

• Physical change

• Chemical change

• Both physical and chemical

• Neither

Tags

NGSS.MS-PS1-4

Which of these statements is TRUE about a physical change?

• The substance completely changes into something new.

• No new substance is created; the material just changes form.

• Physical changes only happen at high temperatures.

• Physical changes are irreversible.