U1: Day 7: Bell Work Scientific Method Test Practice

14. A student sets up an experiment with two plants that are each exactly five inches tall. One is given fertilizer and the other is not. After 4 weeks their height is measured again. What is wrong with this experiment?

• Plants naturally grow at different rates. More trials need to be done.
• Plants grow slowly. The time frame is too short.
• There is no control for this experiment.
• The plants need to be taller to get accurate measurements.

16. Four students were working on an experiment with baking soda. Over three trials, the students were required to take the mass of the baking soda. What is the average amount of baking soda used during trial 3?

• 0.4475 g
• 0.440 g
• 1.79 g
• 0.460 g

Which of the following is NOT a goal of science?

• to investigate and understand the natural world
• to explain events in the natural world
• to establish a collection of unchanging truths
• to use derived explanations to make useful predictions

The work of scientists usually begins with...

• testing a hypothesis.
• careful observations.
• creating experiments.
• drawing conclusions.

9. What is the independent variable?

• time of heating the water
• temperature of water
• amount of water
• degrees C