Physical Vs. Chemical Changes

When water freezes to form ice, what type of change occurs?

• A change that results in the formation of new substances

• A transformation in appearance or state of matter without altering its chemical composition

• A process that cannot be reversed

• A change where the chemical composition of a substance is altered

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following is an example of a physical change?

• Rusting of Iron

• Baking a Cake

• Burning Wood

• Melting Ice in a Drink

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What happens when a piece of paper is burned?

• It only changes the physical state of the paper

• It involves a change in the chemical composition of the paper

• It does not result in the formation of new substances

• It involves a transformation that can easily be reversed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

During a picnic, which of the following activities does NOT involve a physical change?

• Boiling water for tea

• Digesting the sandwiches

• Crushing a soda can for recycling

• Dissolving sugar in lemonade

Why is boiling water for tea considered a physical change?

• Because it is a reversible process and the chemical composition remains unchanged

• Because it cannot be reversed

• Because the water molecules are chemically altered

• Because it results in the formation of new substances

Tags

NGSS.MS-PS1-4

What happens when a piece of paper is burned?

• The physical state of the paper changes without altering its chemical composition

• The paper undergoes a change that can easily be reversed

• New substances with different properties are formed due to changes in molecular composition of the paper

• The appearance of the paper changes, but its molecules remain the same

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

During baking, what indicates that a chemical change has occurred in the cake batter?

• Change in size and shape of the batter only

• Reversible phase changes of ingredients

• Formation of a new substance with different properties, such as a baked cake

• Physical separation of components in the batter

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following examples are physical changes? Check all that apply.

• • Melting an ice cube.

• Boiling water

• • Shredding paper.

• Cooking an egg.

During a camping trip, you decide to make a campfire. Which of the following actions represents a chemical change?

• Collecting snow to melt into water for drinking

• Adding sugar to your tea

• Burning the wood to start the fire

• Tearing leaves to add to a salad

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When water freezes into ice, no new substance is formed.

• True

• False

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4