Physical and Chemical Change

Which of the following BEST describes what happens when you stir sugar and water in a glass?

• The sugar is heavy and falls to the bottom of the glass.

• The sugar dissolves in the water and you cannot see it.

• The water becomes warm and evaporates from the glass.

• The sugar and water join to make a different type of matter.

Tags

NGSS.MS-PS1-2

Peter helps cook meals for his family. Which of these is a chemical change in food?

• frying an egg

• boiling water for tea

• cutting cheese into slices

• stirring chocolate powder into milk

Tags

NGSS.MS-PS1-2

This picture shows ice melting. This happens because

• the ice dissolves into water

• the ice particles break apart

• the temperature of the ice increases

• the water has less energy than ice

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

which of the following is a chemical change?

• boiling water

• cutting paper

• melting ice

• rusting iron

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

what could you do to wood to cause a chemical change?

• break it

• burn it

• cut it

• saw it

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which of the following is a clue that a chemical change has occurred?

• A beaker becomes cold when you mix two liquids in it

• A liquid forms bubbles when it reaches a high temperature

• Water changes color when you add food coloring to it

• A car door feels hot if you touch it on a sunny afternoon

Tags

NGSS.MS-PS1-2

Which of the following is MOST responsible for a liquid changing to a solid

• particles break apart

• increase in particle speed

• weight increases

• temperature decreases

Tags

NGSS.MS-PS1-4

Which is an example of a change in the state of matter?

• crumbling crackers into a bowl of soup

• letting an ice cube melt in a glass of water

• crushing a cube of sugar into a powder

• stirring salt into a glass of water

Tags

NGSS.MS-PS1-4

Your teacher pours vinegar over baking soda. At first, many bubbles form, but then they slowly stop forming. What is the BEST clue that this is a chemical change, not a physical one?

• The bubbles stop forming

• there are many bubbles

• the baking soda did not form bubbles by itself.

• the vinegar is a liquid and baking soda is a powder

Tags

NGSS.MS-PS1-2

You leave your library book on the couch and go to the kitchen. When you return to the couch your dog is chewing on your library book. This is an example of ...

• a mixture

• a chemical change

• a physical change

• a solution