Chemical Reactions

When energy is absorbed and taken in during a chemical reaction it is called

• exothermic

• endothermic

• eccentric

• ectomorphic

Tags

NGSS.HS-PS1-4

When the matter in a chemical reaction gets colder it is called

• exothermic

• endothermic

• eccentric

• endomorphic

Tags

NGSS.MS-PS3-4

NGSS.MS-PS1-4

When the matter in a chemical reaction gets warmer it is called

• exothermic

• endothermic

• eccentric

• endomorphic

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which is the correct description of photosynthesis

• Photosynthesis is a chemical reaction because the atoms of the molecules get rearranged to form new molecules

• Photosynthesis is a chemical reaction because the molecules stay the same before and after the change

• Photosynthesis is a physical change because nature makes it happen

• Photosynthesis is a physical change because the atoms stay the same

Tags

NGSS.MS-PS1-5

NGSS.MS-LS1-6

NGSS.MS-LS1-7

Signs of a chemical change could be:

• a change in energy (temperature, light, sound)

• a precipitate forms (a solid forms from 2 liquids)

• formation of gas (bubbles)

• shocking change in color

• all of these answers are signs of chemical change

Tags

NGSS.MS-PS1-2

The products are:

• molecular oxygen and 2 carbon

• 2 carbon monoxide

• all of these are products

• all of these are reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The reactants are:

• molecular oxygen and 2 carbon

• 2 carbon monoxide

• all of these are products

• all of these are reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

You know that a chemical reaction has occurred if

• there is a precipitate (new solid)

• there is a color change.

• there is a temperature change.

• All of these answers are evidence.

Tags

NGSS.MS-PS1-2

What indicates a chemical reaction occurred?

• Heat or Light is released
  heat or light is produced

• gas (bubbles) produced

• color change

• all of the above

Tags

NGSS.MS-PS1-2

_______________ is an example of both a color change and new substance produced from a chemical change with oxygen and metal.

• shredded paper

• rust (iron oxide)

• wood chips

• melted wax

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5