Physical and Chemical Changes

A physical change is a change that does not cause a new substance to form. Which is an example of a physical change?

• A glass breaking

• A dead plant rotting

• A candlewick burning

• An iron crowbar rusting

A change in color or smell is a sign of what?

• size change

• state change

• texture change

• chemical change

Tags

NGSS.MS-PS1-2

Chemical changes occur when the molecules of one substance are rearranged to form a different substance. Which of the following is a chemical change?

• bending

• burning

• freezing

• shredding

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Daniel has a list of chores to do around the house. Which of his chores is an example of a chemical change?

• Cooking eggs for breakfast

• Oiling a squeaky door hinge

• Sewing a hem on a pair of pants

• Digging weeds in the flowerbeds

Tags

NGSS.MS-PS1-2

NGSS.MS-LS1-7

Chefs use physical and chemical changes in their kitchens. Which statement tells how a cook uses physical changes when making food?

• Frying an egg

• Rolling out a pie crust

• Baking biscuit dough in an oven

• Waiting for a banana to ripen

A chemical change forms a new kind of matter. Which is a chemical change?

• Rusting steel

• Cutting Bread

• Pouring Water

• Breaking Glass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When steel wool is soaked in water and then exposed to air, it slowly rusts. What do you observe when steel wool has rusted?

• The steel wool turns red and brittle

• The steel wool turns white and soft

• The steel wool turns black and green

• The steel wool turns strong and shiny

Tags

NGSS.MS-PS1-2

A plant or animal that has died will decay overtime. Decaying is a chemical change. What observations show that decaying is a chemical change?

• A change in size and shape

• A change in color and smell

• Having the same state of matter

• Having the same temperature

Tags

NGSS.MS-PS1-2

Bonnie uses steel wool to sand model race cars. She knows that steel wool can rust. Where should she store the steel wool to keep it from rusting?

• In a dry place

• In a wet place

• In a dark place

• In a damp place

Wood that is burning in a brush pile has heat, and produces ashes.

• Physical

• Chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4