Chemical Reactions

Which of the following is a sign of a chemical reaction?

• color change

• change from liquid to gas

• change from solid to liquid

• all of these

Tags

NGSS.MS-PS1-2

Which of the following is a sign of a chemical reaction?

• smell of bad milk

• color of a rotten banana

• heat generated by burning a log

• all of these

Tags

NGSS.MS-PS1-2

Photosynthesis is an example of a chemical reaction

• True

• False

Tags

NGSS.MS-LS1-6

NGSS.MS-PS1-2

Rusting of iron is an example of a chemical reaction

• true

• false

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Boiling water is an example of a chemical reaction

• true

• false

Which of the following is true about a chemical change

• chemical changes will not produce a new substance

• All chemical changes are the same

• chemical changes produce a new substance

• none of these

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Release of bubbles is a sign of a chemical change

• true

• false

Tags

NGSS.MS-PS1-2

Why can chemical changes often not be reversed?

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is an example of a chemical change

• chopping wood

• cutting an apple

• light off fireworks

• all of these

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Common name of oxidation of metal is _________