Ch.10 Unit Test Study Guide

According to the Law of Conservationo of Mass, 4 atoms of calcium can react to produce six atoms of calcium

• True

• False

Tags

NGSS.MS-PS1-5

To balance an equation you only need to change the subscripts of the molecules

• True

• False

When a chemical equation contains the same number of atoms on both sides, the equation is balanced.

• True

• False

Tags

NGSS.MS-PS1-5

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

• reactant

• precipate

• product

• catalyst

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 always equal.

Tags

NGSS.MS-PS1-5

A change in ______ is a sign of energy being used in a chemical reaction.

• temperature

• color

• odor

• texture

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

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

• light given off by a firefly

• copper turning green when exposed to the air

• a solid forming from two liquids reacting

• bubbles in boiling water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Metallic chlortes, when heated, resulting in metallic chlorides and oxygen. This is a _________reaction.

• synthesis

• decomposition

• single -replacement

• double - replacement

Energy is needed to break the bonds in chemical reactions.

• True

• False

Tags

NGSS.HS-PS1-4

A chemical reaction in which more energy is absorbed than is released is endothermic

• True

• False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4