Sci_8_Q1 Practice Assessment

What is your name?

1. What is the independent variable in the data table below? (8.N.1.1)

• the number of trials
• the number of chirps
• the number of crickets
• the temperature

2. What conclusion can be drawn using the data from the chart below? (8.N.1.1)

• If crickets are subjected to higher temperatures then the number of chirps per minute will increase.
• If crickets are subjected to higher temperatures then the number of chirps per minute will decrease.
• If crickets are subjected to the same temperatures then the number of chirps per minute will increase.
• If crickets are subjected to lower temperatures then the number of chirps per minute will increase.

3. What evidence supports the claim that the higher the temperature, the greater the number of chirps? (8.N.1.1)

• At 25°C the average number of chirps per minute was 83, compared to 127 chirps at 20°C and 168 chirps at 15°C.
• At 25°C the average number of chirps per minute was 168, compared to 127 chirps at 20°C and 83 chirps at 15°C.
• At 25°C the average number of chirps per minute was 127, compared to 83 chirps at 20°C and 168 chirps at 15°C.
• At 25°C the average number of chirps per minute was 91, compared to 135 chirps at 20°C and 180 chirps at 15°C.

4. Which of the following examples shows an experiment that has been designed and conducted using repeated trials and replication? (8.N.1.2)

• Addison is conducting an experiment using water. She has a friend look over the procedures before completing 30 trials.
• Amanda is conducting an experiment using aluminum foil. She completes her experiment 1 time and makes adjustments to her procedures. She then completes 20 trials of her experiment.
• Rashawn is conducting an experiment using tennis balls. He completes 30 trials and has 2 of his friends complete the experiment by following the his procedures.
• Julian is conducting an experiment using rubber bands. He completes 10 trials then begins work on a different experiment.

5. Which of the following shows repeated trials in an experiment but does NOT show replication? (8.N.1.2)

• Samuel writes his own procedures and then has a friend complete 20 trials.
• Leslie writes her own procedures for her group to follow.
• Joshua conducts an experiment by following the procedures given to him by his teacher.
• Katelyn conducts an experiment that requires her to throw an object at a target 20 times.

6. Which statement below explains the possibility for a distance versus-time graph to be a vertical line? (6.P.12.1)

• it is not possible
• when an object is moving at a constant speed
• when an object is not moving
• when an object is moving 2 meters per second

7. What happens when an unbalanced force acts on an object? (6.P.13.3)

• The force must be greater than the reaction force.
• The force is equal to the weight of the object.
• The motion of the object changes.
• The motion of the object does not change.

8. Which of the following demonstrates an unbalanced force? (6.P.13.3)

• A dog pushes its dog dish to the left with a force of 4 N. A cat pushes it to the right with a force of 4 N.
• A child pushes a toy car to the left with a force of 3 N. Their parent pushes the same toy car to the right with a force of 3 N.
• A woman pushes a bike to the right with a force of 10 N. Another woman pushes the same bike to the left with a force of 10 N.
• A man pushes a desk to the right with a force of 16 N. Another man pushes the same desk to the left with a force of 10 N.

9. During field day, team E and G combine to compete against team F and H. What conditions would be necessary in order for teams F and H to win? (6.P.13.3)

• One person on team E and G falls down and their team loses a force 112 N.
• One person on team E and G falls down and their team loses a force of 100 N.
• One person on team F and H pulls harder with an additional force of 75 N.
• Two people on team F and H pull harder with an additional force of 50 N each.