G6/7/8 Criterion Bii, Biii Review

What is a valid hypothesis?

• A testable statement predicting the relationship between the IV and DV.
• A question with no prediction.
• A random guess with no variables.
• An explanation after the experiment is done.

Does a hypothesis need a reason?

• Yes
• No
• Only sometimes
• Not necessary at all

What is the minimum number of trials should be conducted for valid results?

• At least 3
• 1.0
• 2.0
• As many as possible

After conducting at least 3 trials, what must be calculated from them?

• A mean average
• A median
• Add all your results together
• Multiply all your results together

What is the purpose of controlling variables?

• To ensure that only the IV affects the DV
• To speed up the experiment
• To manipulate the DV
• To get more data points

What range of data is typically considered the minimum required in a valid experiment?

• 5 data points
• 2 data points
• 10 data points
• Only 1 data point

How can you manipulate the independent variable (IV) in an experiment?

• By changing it in even amounts
• By changing it randomly
• By keeping it constant
• By avoiding any changes

What is the dependent variable (DV) in an experiment?

• The variable that is measured
• The variable that is kept constant
• The variable that is changed on purpose
• The variable that is ignored

Which of the following is a controlled variable (CV) in an experiment to measure plant growth?

• Amount of water given
• Height of the plant
• Time of measurement
• Number of leaves

Why are repeated trials important in an experiment?

• To increase reliability of the results
• To make the experiment longer
• To confirm the hypothesis
• To increase errors in the results