Assessment

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The rate of a reaction increases as temperature__________________.

• Decreases
• Increases
• Stays the Same
• Disappear

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
• surface area
• temperature
• concentration

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

The following are factors that affect the rate of a reaction EXCEPT.

• temperature
• Concentration
• Volume
• catalysts

What factors can affect the value of the activation energy of a reaction?

• The presence of a catalyst
• changes in temperature
• changes in concentration of the reactants
• changes in pressure

This type of nuclear reaction happens in Power Plants

• Fission
• Fusion
• Freezing
• Condensation

What type of radioactive decay is shown below?

• Alpha
• Beta
• Positron
• Gamma