Molecules and Chemical Change

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

Which type of change can be reversed?

• a physical change
• a chemical change
• a molecular change
• an electric change

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

• a moderate climate
• pressure
• motion
• extreme heat

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

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

Stepping on a bag of potato chips would cause what kind of change?

• mechanical
• thermal
• physical
• chemical

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 a chemical change is when the molecules of matter change to form a new substance
• a physical change is wehn the molecules of matter change to form a new substance and a chemical change is when the size, shape, or state of matter changes
• a physical change can occur in a solid, liquid or a gas and a chemical change can only occur in a liquid

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5