Review: Chemical Reactions

Define physical change.

• change that alters form or appearance of a substance without changing it to a different substance

• change in matter that produces one or more new substances ; atoms and molecules rearrange to form new combinations

Tags

NGSS.MS-PS1-4

Define chemical change.

• change that alters form or appearance of a substance without changing it to a different substance

• change in matter that produces one or more new substances ; atoms and molecules rearrange to form new combinations

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is Law of Conservation of Matter/Mass?

• matter cannot be created or destroyed

• matter can be created or destroyed

• mass is matter

Tags

NGSS.MS-PS1-5

What is an endothermic reaction?

• cooler than its surroundings ; absorb energy

• 1. hotter than its surroundings ; releases energy 

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is an exothermic reaction?

• cooler than its surroundings ; absorb energy

• 1. hotter than its surroundings ; releases energy 

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

The LEFT side of the reaction are

• reactants

• products

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

The RIGHT side of the reaction are

• reactants

• products

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Another term for chemical change is

• physical change

• chemical reaction

• product

• reactant

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is an open system?

• system where matter can enter & escape

• system where no matter is allowed to enter or leave

What is an closed system?

• system where matter can enter & escape

• system where no matter is allowed to enter or leave