Physical, chemical, reversible, and irreversible changes

What is a physical change?

• A change where the shape is altered or can be done again.

• Done by hand

• irreversible

• do not click this

Which is defined as a chemical change?

• Tearing paper

• Rust

• cutting a subway sandwich

• throwing a basketball

Which of these is NOT a reversible change?

• Water to Ice
• Juice to Popsicle
• Cookie Dough to Cookie
• Melting Chocolate

Tags

NGSS.5-PS1-4

What is an irreversible change?

• Something you can change back.
• Something you cannot change back.

Tags

NGSS.5-PS1-4

What is a reversible change?

• Something you can change back.
• Something you cannot change back.

Tags

NGSS.MS-PS1-4

Tearing paper is an example of a 

• physical change 
• chemical change 

Miss Usami makes brownies. She stirs the liquid brownie mix together and puts it in the oven. She now has solid brownies. This is an example of a(n)

• irreversible change 
• reversible change 

Burning and baking are examples of __________________ because they are irreversible.

• chemical changes
• physical changes
• melting
• freezing

Tags

NGSS.MS-PS1-2

Cutting and mixing are examples of ______________________ because they are reversible.

• chemical changes
• physical changes
• freezing
• melting

Tags

NGSS.5-PS1-2

NGSS.5-PS1-4

The picture shows an example of a ______________ change.

• chemical
• physical
• irreversible
• freezing

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4