Unit 1 - Chemistry (PRACTICE TEST)

A reaction that releases energy in the form of heat is known as . . .

• a synthesis reaction

• an exothermic reaction

• a decomposition reaction

• an endothermic reaction

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A reaction that absorbs energy in the form of heat is known as . . .

• a synthesis reaction

• an exothermic reaction

• a decomposition reaction

• an endothermic reaction

Tags

NGSS.MS-PS1-4

the process by which one or more substances change to produce one or more different substances, defines ___________

• conservation of mass

• a chemical reaction

• a chemical formula

• a catalyst

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How does this show the conservation of mass?

• The masses of the products are different from the reactants

• matter was destroyed at the end of the chemical reaction

• matter was created at the beginning of the chemical reaction

• the masses of the reactants and products are equal

Tags

NGSS.MS-PS1-5

a change to a substance that happens without forming a new substance

• physical change

• chemical change

• double replacement reaction

• combustion

Tags

NGSS.MS-PS1-4

The total mass of the reactants before a chemical reaction is the same as the total mass of the products after the reaction, because matter cannot be created or destroyed

• Law of Conservation of Mass

• Law of Gravity

• Newton's First Law

• Chemical formula

Tags

NGSS.MS-PS1-5

The number of total atoms in the reactants of a chemical reaction...

• must be the same as the total number of atoms in the products of the chemical reaction.

• will change depending on the products of the chemical reaction.

• is either the same or different than the total number of atoms in the products depending on what type of reaction it is.

• determines what type of reaction can happen.

Tags

NGSS.MS-PS1-5

Which of the following shows evidence that a NEW gas has formed in a chemical reaction?

• Bubbling / fizzing

• State of matter change

• Color change

• Formation of a precipitate

Tags

NGSS.MS-PS1-2

One of the signs of a chemical reaction taking place is:

• Increase in temperature without applying heat

• The formation of a heterogenous mixture

• The formation of a homogenous mixture

• Color of reactants staying the same

Tags

NGSS.MS-PS1-2

What type of reaction is energy transferred from the surroundings to the reactants

• exothermic

• polyatomic

• endothermic

• polygenic

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5