Introduction to Chemical Reactions Quiz

What are some clues that a chemical reaction has occurred?

• Production of a gas

• Formation of a precipitate (solid)

• Change in color

• All of the above

Tags

NGSS.MS-PS1-2

What is an exothermic reaction?

• A reaction that absorbs energy in the form of heat

• A reaction that releases energy in the form of heat

• A reaction that feels colder

• A reaction that changes color

Tags

NGSS.MS-PS3-4

NGSS.MS-PS1-4

What are the substances that undergo chemical changes called?

• Reactants

• Products

• Coefficients

• Subscripts

Tags

NGSS.MS-PS1-5

What are the substances that form in a chemical reaction called?

• Reactants

• Products

• Coefficients

• Subscripts

What are the regular-sized numbers in front of a chemical formula called?

• Reactants

• Products

• Coefficients

• Subscripts

What are the little numbers that you see after some elements called?

• Reactants

• Products

• Coefficients

• Subscripts

What does the arrow in a chemical equation represent?

• Reactants

• Products

• Coefficients

• Yields

What is the Law of Conservation of Mass?

• Matter is created during a chemical change

• Matter is destroyed during a chemical change

• Matter is neither created nor destroyed during a chemical change

• Matter is conserved during a chemical change

Tags

NGSS.MS-PS1-5

What can be adjusted to balance a chemical equation?

• Reactants

• Products

• Coefficients

• Subscripts

Tags

NGSS.HS-PS1-7

What is the purpose of balancing a chemical equation?

• To make the equation look neat

• To follow the Law of Conservation of Mass

• To change the subscripts

• To change the coefficients

Tags

NGSS.MS-PS1-5