Lesson 4

Question 1

Process that changes set of chemicals to another

Answer 1

Chemical reaction

Question 2

What is conserved during a chemical reaction?

Answer 2

Mass and energy

Question 3

Elements or compounds that enter into a chemical reaction ?

Answer 3

Reactants

Question 4

Elements or compounds produced by chemical reaction

Answer 4

Products

Question 5

What happens to energy when chemical bonds are formed or broken

Answer 5

Energy is released or absorbed

Question 6

Chemical reactions involve changes in what ?

Answer 6

Energy

Question 7

Which reactions occur on their own ?

Answer 7

Reactions that release energy

Question 8

Which reactions need a source of energy to occur

Answer 8

Reactions that absorb energy

Question 9

Substance that speeds up the rate of a chemical reaction

Answer 9

Catalysts

Question 10

During a reaction, energy is released in the form of what ?

Answer 10

Heat

Question 11

Speed up chemical reactions. Biological catalysts

Answer 11

Enzymes

Question 12

What can affect the activity of enzymes ?

Answer 12

Temperature, pH, regulatory molecules