UNIT 2 Assessment ONLY ONE ATTEMPT

The compounds that go into a reaction are called __________, while those that come out are called ________.

• products, reactants

• elements/equations

• reactants/products

• atoms/elements

Tags

NGSS.MS-PS1-5

When atoms rearrange to form new substances, a __________________________ has taken place.

• Compound Reaction

• Physical Reaction

• Chemical Reaction

• Matter Reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is NOT a sign of a chemical reaction?

• change in phase solid to liquid

• precipitate being formed

• color change

• fizzing

Tags

NGSS.MS-PS1-2

Reactions that absorb thermal energy are

• Endothermic

• Exothermic

Tags

NGSS.HS-PS1-4

The idea that states the mass of the chemical components before the reaction is equal to the mass of the components after the reaction.

• Law of Chemistry

• Law of Conservation of Mass

• Law of Evolution

• Law of Polarity

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which Statement below best describes what it means for an equation to be balanced?

• The number of molecules is the same before and after the reaction occurs.

• There are the same number of atoms on the reactant side and the product side of the equation.

• The coefficients are equal to the subscripts.

Tags

NGSS.MS-PS1-5

The only way to know for sure if a chemical reaction took place is to test the properties of the new substance.

• True

• False

Tags

NGSS.MS-PS1-2

When balancing a chemical equation, you are allowed to change the subscripts.

• True

• False

When balancing a chemical equation, you are allowed to change the coefficients.

• True

• False

Tags

NGSS.HS-PS1-7

How many glucose molecules are there in the figure?

• 2

• 4

• 8

• 12

Tags

NGSS.MS-LS1-7

NGSS.MS-PS1-5