Chemical Reactions & Processes

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

When you have liquid gold and then 2 hours later you have solid gold, this is a...

• chemical change

• chemical reaction

• physical change

• phase change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

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 atoms you begin with in a chemical reaction ...

• must be the same as the number of  atoms you end with
• must be an even number
• can be different to the number you finish with
• changes depending on how much energy is formed

Tags

NGSS.MS-PS1-5

Which one shows that a chemical reaction has occurred?

• dissolving

• melting

• formation of a gas

• bending

Tags

NGSS.MS-PS1-2

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

• Bubbles are produced 
• Reactants are not combining
• Products are not forming
• Color is not changing

Tags

NGSS.MS-PS1-2