Semester 1 Final Review (24-25)

A student place a drop of iodine (a reddish-brown dye) on a piece of white potato. The student noticed that the potato turned black where the drop of iodine landed. What the student noticed is an example of

• a prediction
• a hypothesis
• an observation
• an inference

The data table below shows information gathered from a science experiment. Time was measured in seconds (s) and distance was measured in meters (m). Which grid is correctly designed to show these data in a line graph?

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The rate of respiration of a freshwater sunfish was determined at dierent temperatures. The rate of respiration was determined by counting the number of times the gill covers of the fish opened and closed during 1-minute intervals at the various temperatures. The following data were collected. According to data, as the temperature increases, the rate of respiration of the sunfish

• increase steadily
• decrease steadily
• increases, then decreases
• decreases, then increases

The data table shows water temperature at various depths in an ocean. The approximate water temperature at a depth of 125 meters would be closest to

• 15 degrees C
• 13 degrees C
• 8 degrees C
• 3 degrees C

An entomologist (bug scientist) wants to determine if temperature changes affect how many times a cricket chirps. What is the independent variable?

• the scientist
• changing the temperature
• the cricket
• the number of times a cricket chirps

A student is planning an experiment to find out how the height from which he drops a ball affects how high the ball bounces. What is the dependent variable?

• diameter of the ball
• force acting on the ball
• height that the ball bounces
• height from which the ball is dropped

Mrs. Speed wanted to investigate if the amount of times the students played the quizizz review would affect their score on the quiz. What is/are the dependent variable?

• score on quiz
• amount of times quizizz played
• quiz given
• time of day quiz taken
• time of day quizizz taken

Mrs. Speed wanted to investigate if the amount of times the students played the quizizz review would affect their score on the quiz. What is/are the control variable? Choose all that apply.

• score on quiz
• amount of times quizizz played
• quiz given
• time of day quiz taken
• time of day quizizz taken

Why is it beneficial to be able to predict when and where natural hazards will occur?

• Communities can be notified to evacuate.
• So that we can stop them from happening again.
• So that scientists know where to go in order to study them.
• So that we can harness their power for renewable energy.

How can people mitigate human loss in the event of a tornado?

• Get below ground level or to the interior of a building
• Get to higher ground
• Evacuate a building or area
• Drive away quickly