ASSESSMENT CARD 13

Which of the four factors affecting reaction rate is most important in each of the following examples?

Raw carrots are cut into thin slices for cooking.

• concentration

• temperature

• surface area

• catalyst

Which of the four factors affecting reaction rate is most important in each of the following examples?

Protein is broken down in the stomach by the enzyme pepsin.

• concentration

• temperature

• surface area

• catalyst

Which of the four factors affecting reaction rate is most important in each of the following examples?

A woolly mammoth is found, perfectly preserved, near the Arctic.

• concentration

• temperature

• surface area

• catalyst

Which of the four factors affecting reaction rate is most important in each of the following examples?

More bubbles appear when a concentrated solution of hydrochloric acid is added to a magnesium strip than when a dilute solution of the acid is added.

• concentration

• temperature

• surface area

• catalyst

When you walk through a crowded hallway at school, you are more likely to bump into another person. To which of the following factors that affect rate of reaction is this analogy referring?

• catalyst 

• temperature

• surface area

• concentration

Which of the following are true about how temperature affects the rate of reaction?

I. heating causes the particles of the reactants to move more quickly

II. lowering the temperature will raise the energy level of the particles

III. increasing the temperature results in more collisions between the particles

• I and II only

• II and III only

• I and III only

• I, II, and III

Increasing which of the following will increase the frequency of collisions?

I. temperature II. surface area III. concentration

• I and II only

• I and III only

• II and III only

• I, II, and III

Which of the following will lower the rate of reaction?

• adding an enzyme to the reaction

• decreasing the temperature from 40˚C to 10˚C

• breaking a chunk of calcium up into smaller pieces

• increasing the amount of solute dissolved in a solution