M19 Test Review - Chemical Reactions

Each substance written to the right of the arrow in a chemical equation is a ___.

• reactant

• product

• precipitate

• catalyst

Tags

NGSS.MS-PS1-5

According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactants?

• there is no relationship

• the mass of products is sometimes greater

• the mass of reactants is greater

• the masses are equal

Tags

NGSS.MS-PS1-5

Which chemical equation is balanced?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-5

Which one to the following factors would NOT speed up a chemical reaction?

• increasing the concentration of a reactant

• adding a catalyst

• raising the temperature

• making the reactant particles larger

Tags

NGSS.HS-PS1-5

The burning of gasoline in an automobile engine is an example of a(n) _____.

• photosynthesis reaction

• endothermic reaction

• exothermic reaction

• reversible reaction

Tags

NGSS.MS-PS1-5

In a chemical change, energy can be _____.

• created, but not destroyed

• destroyed, but not created

• either created or destroyed

• neither created nor destroyed

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

In a(n) _____ reaction, the products are at a higher energy level than are the reactants.

• activation

• catalytic

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

Even in an exothermic reaction, _____ is needed to get the reaction started.

• activation energy

• a catalyst

• an endothermic reaction

• an inhibitor

Tags

NGSS.HS-PS1-5

A cake is placed in a heated oven and baked. The reactions that take place during this process are _____.

• catalyzed

• endothermic

• exothermic

• inhibited

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

The energy involved in endothermic and exothermic reactions is _____.

• chemical

• heat

• light

• electrical

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4