Nature of Science - 2021-22

An organized procedure for testing a hypothesis is a(n) _.

• experiment

• independent variable

• constant

What two things are needed for a scientific investigation?

• Data and observations
• Observations and a hypothesis
• Evidence and observations
• Hypothesis and conclusion

Steve wanted to see if the type of fertilizer made sunflowers grow larger. What is the independent variable 

• Type of fertilizer
• Size of sunflower
• type of sun flower

Steve wanted to see if the type of fertilizer made sunflowers grow larger. What is the dependent variable 

• Type of fertilizer
• Size of sunflower
• Type of sunflower

This variable in an experiment is the one being deliberately changed by the scientist. 

• dependent variable
• independent variable
• data
• control group

The part of the experiment that remains the same for the control and experimental group.

• constants
• control
• independent
• dependent

An experiment is being done to determine how light affects the growth of small zinnia plants. One plant is placed in full sunlight, the second in a shaded area, the third in an unlit closet. The hypothesis of this experiment could be:

• Plants grow differently under different conditions.
• Zinnia plants in direct sunlight grow taller than zinnia plants in little or no sunlight.
• Many things, including sunlight, affect the growth of a plant.

Why do we want to test one variable at a time?

• Because it is hard to setup a data table with more than one
• It keeps the experiment fair and you can see what caused the change
• It is what has always been done
• It makes the results better in an experiment

Mrs. G set up an experiment to see how the type of ball affects the distance it rolls off a ramp. Identify the manipulated in this experiment.

• distance traveled by the ball

• height of the ramp

• the type of ball

Mrs. Ditty wants to investigate which brand of trash bag can withstand the most amount weight before ripping. Identify the responding variable for her investigation.

• amount of trash bags

• brand of trash bags

• amount of weight

• same size trash bags