Chemical vs Physical Changes

Jazlyn left her bike outside, buried in snow. In the spring, when the snow melted, she found her bike covered in rust. Which best describes the change to the bike?

• It was a chemical change, because the bike was a different color.
• It was a chemical change, because the rubber tires were deflated.
• It was a chemical change, because rust can be removed from the metal.
• It was a chemical change, because rust is a new substance on the metal.

Tags

NGSS.MS-PS1-2

Which example best describes a physical change?

• iron rusting burning
• charcoal 
• an ice cube melting
• a marshmallow burning

Tags

NGSS.MS-PS1-4

Which change is most likely to produce a new substance?

• a piece of paper burning
• sugar dissolving into water
• glass breaking into many pieces
•  water boiling and creating steam

Tags

NGSS.MS-PS1-2

Which example best describes a physical change?

• baking a pie
• burning a candle
• making paper origami

Which is an example of a chemical change?

• melting ice to make water
• baking cake batter to make a cake
• putting cheese on bread to make a cheese sandwich

Tags

NGSS.MS-PS1-2

When water freezes, a physical change has occurred. Which is most likely a property of the material formed by this physical change?

• It will never be a liquid again.
• It will be in the form of a gas.
• It can be changed back into its original form.
• It can take the form of any container it is put in.

Tags

NGSS.MS-PS1-4

Kevin is observing an ice cube in a bowl. Which statement describes the change that Kevin will most likely observe?

• Kevin will observe a liquid changing into a solid.
• Kevin will observe a solid changing into a liquid.
• Kevin will observe a liquid changing into a gas.
• Kevin will observe a solid changing into a gas.

Tags

NGSS.MS-PS1-4

Water is boiled and water vapor forms. Which best describes this process?

• A chemical change occurs because a completely new substance forms.
• A chemical change occurs because the temperature of the water changes.
• A physical change occurs because the water disappears as it is absorbed by air.
• A physical change occurs because water and vapor are differentstates of the same substance.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

A piece of paper is torn into several small pieces. This is an example of what kind of change?

• physical
• chemical
• electrical
• mechanical

Which best explains why burning wood is a chemical change?

• The process occurs quickly.
• The process can be reversed.
• The process can be repeated.
• The process creates a new substance.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5