Chapter 4: Chemical Reactions Review

According to the Law of Conservation of Mass,

• matter is always created in a chemical reaction

• matter is always destroyed in a chemical reaction

• matter is created and then destroyed in a chemical reaction

• matter is not created or destroyed in a chemical reaction

Tags

NGSS.MS-PS1-5

Examine the following chemical reaction: H20 + CO2 → C6H12O6 + O2 What are the reactants?

• H20 + CO2

• →

• C6H12O6 + O2

• H20 + CO2 → C6H12O6 + O2

Tags

NGSS.MS-PS1-2

Examine the following chemical reaction: H20 + CO2 → C6H12O6 + O2 What are the products?

• H20 + CO2

• →

• C6H12O6 + O2

• H20 + CO2 → C6H12O6 + O2

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Examine the following chemical reaction: H2O2 → H2O + O2 What are the products?

• H2O2

• →

• H2O + O2

• H2O2 → H2O + O2

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Examine the following chemical reaction: H2O2 → H2O + O2 What are the reactants?

• H2O2

• →

• H2O + O2

• H2O2 → H2O + O2

Tags

NGSS.MS-PS1-2

Substances that start a chemical reaction are known as the

• reactants

• products

• chemicals

• substances

Tags

NGSS.MS-PS1-5

Substances created, or made, during a chemical reaction are known as the

• reactants

• products

• chemicals

• substances

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In which of the following examples has a chemical reaction occurred?

• After putting liquid batter into a hot pan, the batter solidifies and begins to turn brown.

• After turning on a blender filled with fruits, the fruit is chopped up and mixed together.

• After taking a tray filled with ice cubes out of the freezer, the cubes begin to melt.

• After adding a spoonful of sugar to a mug of hot coffee, the sugar dissolves completely.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

An gel ice pack getting cold after you put it in the freezer for an hour.

• Chemical Change

• Physical Change

Tags

NGSS.MS-PS3-4

Which of the following IS a physical change?

• Getting a haircut
• Rusty metal
• sour milk
• A compound

Tags

NGSS.MS-PS1-4