Physical and Chemical Changes, Molecular Movement

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 create form a molecule

What type of change can be reversed?

• A physical change

• A chemical change

• A molecular change

• An electric change

Which of following would cause the molecules in matter to change?

• A moderate climate

• Pressure

• Motion

• Extreme heat

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

If a substance changes color, what has most likely happened?

• A pressurized change has taken place

• A chemical change has taken place

• A physical change has taken place

• Nothing has taken place

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Stepping on a bag of potato chips would cause which type of change?

• Mechanical

• Thermal

• Physical

• Chemical

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

• A gas forms when change has taken place

• The substance is smaller than it was before 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 only occurs in liquids, and a chemical change can occur in a solid, liquid, or gas

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

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

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