Chemical Reaction

A copper penny turning greenish after a few years is an example of...

• Chemical Change

• Physical Change

Tags

NGSS.MS-PS1-2

How is a physical change different from a chemical change?

• There is absolutely no difference

• Chemical changes produce a new substance, physical changes stay the same substance

• Chemical changes create and destroy matter, physical changes don't

• Physical changes create and destroy matter, chemical changes dont

Tags

NGSS.MS-PS1-4

A change in which NEW substances are formed.

• Chemical change

• Physical change

• Casual change

• Formal change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is a chemical change?

• freezing fruit juice

• slicing a potato

• boiling water

• copper metal turning green

Tags

NGSS.MS-PS1-2

In air, phosphorous, a white solid, spontaneously reacts to produce a pale, green light. Why might the green light be evidence of a chemical reaction?

• Green is a color associated with reactions.

• Phosphorous is a solid at room temperature.

• The reaction will not occur in a closed container.

• It indicates a change in temperature.

Tags

NGSS.MS-PS1-2

Exothermic reactions...

• Absorb energy

• Release energy

• Release Color

• Absorb Color

Tags

NGSS.MS-PS1-4

Which is NOT an example of chemical change?

• production of gas.

• change in color.

• change in size.

• transfer of energy.
  

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Chemical reactions that absorb energy are known as ________________________.

• Endothermic

• Exothermic

• Boring

• Reactions

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What is the law of conservation of mass?

• The part of the universe being studied

• The rest of the universe that interacts with the system

• Within a closed system, mass does not change

• A system that freely exchanges matter and energy

Tags

NGSS.MS-PS1-5

A new substance formed

• Physical

• Chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5