Chemical Reactions/Acids & Bases

Exothermic reactions...

• Absorb energy
• Release energy
• Release Color
• Absorb Color

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

In an endothermic reaction, heat is ...

• taken in or absorbed
• given out or released 

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Is photosynthesis an exothermic or endothermic reaction?

• Endothermic
• Exothermic
• Neither

Tags

NGSS.MS-LS1-6

When calcium reacts with water, the temperature changes from 18°C to 39°C. Which statement is correct?

• The solution at the end is acidic

• The reaction is reversible

• The reaction is exothermic

• The reaction is endothermic

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

if less heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants

• Endothermic

• Exotermic

• Exothermic

• Entrothermic

Tags

NGSS.HS-PS1-4

if more heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants

• Exothermic

• Endothermic

• Exotermic

• Endotermic

Tags

NGSS.HS-PS1-4

This diagram is exothermic. Why?

• products are always at a lower energy compared to the reactants

• Products are always at a higher energy compared to the reactants

• Reactants are always the same as the products

• Whaaaaattttttttt?????

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Is this diagram endothermic or exothermic

• Endothermic

• Exotermic

• Exothermic

• Endote

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When heated, oxygen reacts with copper to form copper oxide:
If this reaction occurs in a sealed container, will the mass of the container and everything in it increase, decrease, or stay the same and why?

• The mass will stay the same because the number of each kind of atom stays the same.
• The mass will increase because a new kind of molecule is formed.
• The mass will decrease because two substances combine to form one substance.
• More information is needed to tell if the mass will change.
  

Tags

NGSS.MS-PS1-5

In chemical reactions, what does the principle of conservation of mass mean?

• Matter is not created or destroyed.
• The total mass of the reactants is greater than the total mass of the products.
• The total mass of the reactants is less than the total mass of the products.
• Matter is not changed.
  

Tags

NGSS.MS-PS1-5