Physical and Chemical Changes

Which is an example of a different substance being formed?

• wood burning

• water freezing

• metal melting

• glass breaking

Tags

NGSS.MS-PS1-2

Brad accidentally left his crayon box in the car on a hot day. Which best explains what happened to his crayons?

• crayons melted; changed from solid to liquid

• crayons melted; changed from liquid to solid

• crayons evaporated; changed from liquid to solid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Jennifer 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

Gloria’s family built a wood fire in the fireplace. The next day, Gloria noticed that there was no wood left in the fireplace, only ashes. Which best explains this?

• Wood is separated from ashes as it burns.

• Wood becomes a new substance as it burns.

• Ashes have the same properties as wood.

• Ashes are the same substance as wood.

Tags

NGSS.5-PS1-4

A glass of salt water is put on a windowsill. After several days the water has disappeared, and there is only a film of white crystals left in the bottom. Which best explains what has happened?

• The salt caused the water to dry up.

• The water evaporated and left the salt behind.

• The water and the salt evaporated and left a film behind.

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

Which is the best example of a physical change?

• ice melting

• paper burning

• fireworks exploding

• leaves changing color

Tags

NGSS.MS-PS1-4

Which would most likely result in change in the state of matter?

• baking a cake

• boiling water

• lighting a match

• rusting bike chain

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which change would result in a new substance being formed?

• sugar dissolving in water

• a glass bottle breaking

• ice melting in a bowl

• a metal can rusting

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

• physical

• chemical

• electrical

• mechanical

cutting paper​ (a)  

rusted metal​ (b)  

Mixing Baking Soda and Vinegar​ ​ (c)  

freezing water​ (d)  

• physical change
• chemical change

Tags

NGSS.MS-PS1-2