Study Jams: Physical and Chemical Changes

When does a physical change occur?

• when molecules combine to form a compound

• when a new element is created

• when the size, shape, or state of matter changes

• when elements combine to form a molecule

Tags

NGSS.MS-PS1-4

Which of the following is a clue that a chemical change has taken place?

• A gas forms when the change takes place.

• The substance is smaller than it was before the change took place.

• The substance has been shaken up.

• The substance looks the same as it did before the change took place.

Tags

NGSS.MS-PS1-2

What is the difference between a physical change and a chemical change?

• A physical change can only occur in liquids, and a chemical change can occur in a solid, a liquid, or a gas.

• A physical change is when the size, shape, or state of matter changes, and chemical change is when the molecules of matter change to form a new substance.

• A physical change is when the molecules of matter change to form a new substance, and a chemical change when the size, shape or state of matter changes.

• A physical change can occur in a solid, a liquid, or a gas, and a chemical change can only occur in a liquid.

Which type of change can be reversed?

• a physical change

• a chemical change

• a molecular change

• an electric change

Tags

NGSS.MS-PS1-4

Tearing paper and chopping wood are examples of ​ (a)   change, while burning paper or wood is an example of ​ (b)   change.

• physical

• chemical

• state

• molecular

Tags

NGSS.MS-PS1-4

A ​ (a)   is a change in the form or properties of a substance that occurs ​ (b)   a change in composition.

• chemical change

• physical change

• without

• with

Tags

NGSS.MS-PS1-4

A chemical change is when a ​ (a)   is formed. A physical change is when ​ (b)   is formed.

• new substance

• NO new substance

Answer explanation

A chemical change occurs when a new substance is formed as a result of a chemical reaction, while a physical change occurs when there is a change in the state or appearance of a substance without altering its chemical composition. In this question, the correct choices are 'new substance' for a chemical change and 'NO new substance' for a physical change.

Tags

NGSS.MS-PS1-2

Chemical Change results in ​ (a)   while a physical reaction results in atoms ​ (b)   in a reaction.

• a new substance

• rearranged

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

An evidence of a chemical reaction can be​ (a)   while a physical reaction results in ​ (b)   .

• gas,light or odor production

• absorption or being dissolved

Tags

NGSS.MS-PS1-2

Baking a cake is a (a)   ​ change.

• chemical

• physical

• emotional

Tags

NGSS.MS-PS1-4