chemical and Physical Change

Which is an example of a change that results in a new material?

• melting wax

• cutting paper

• sawing wood

• exploding fireworks

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Raymond was cleaning out his kitchen cupboards. He put a cast iron pan outside with his trash. A week later, he saw the pan had rusted. Which best describes what happened to the pan?

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When baking soda is added to vinegar, bubbles form. Which is true about the reaction?

• Permanent change; the rust is new material that formed.

• Temporary change; the rust is new material that formed.

• Temporary change; the reaction was caused by a temperature change.

• Permanent change; the reaction was caused by a temperature change.

Tags

NGSS.MS-PS1-2

What are the bubbles?

• The bubbles are the vinegar.

• The bubbles are the baking soda.

• The bubbles are both the baking soda and vinegar.

• The bubbles are different from the baking soda and the vinegar.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Libby mixed one cup of water with one tablespoon of salt. Why did the salt dissolve?

Tags

NGSS.MS-PS1-2

Why does the salt seem to disappear?

• The salt condensed.

• The salt evaporated.

• The salt changed into water.

• The salt dissolved in the water.

Tags

NGSS.MS-PS1-2

Which would most likely result in a new substance being produced?

• tearing a newspaper

• breaking a glass

• baking a cake

• cutting bread

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Susan is completing an experiment in science. She mixes 1 cup of hot water with 2 cups of salt. What will most likely happen to the substances?

• The substances will blend and their properties will be changed.

• The salt will dissolve in the water, forming a solution.

Which statement describes how to control a variable in this investigation?

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

Which of the following should be kept the same in each experiment?

• The amount of substance used in the experiment should vary.

• The amount of time it took to mix the substances in the experiment should vary.

• The substances that are combined in each experiment should be the same.

• The temperatures of the substances that are combined should be the same.

Tags

NGSS.MS-PS3-4