Experimental Design

The type of variable that you change or manipulate in an experiment.  It is what you are testing.

• Independent
• Dependent
• Control

The type of variable that responds to the experiment and is what you measure to determine if your hypothesis is true.

• Independent
• Dependent
• Control

The parts of the experiment that must be kept the same.

• Constants
• independent
• Dependent

If I water the plant more often, then it will grow taller.  Name the dependent variable.

• The amount of water.
• The amount of soil.
• The height of the plant.
• The amount of water.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Which of these is not an observation.

• There are footprints.
• The person was dizzy.
• The footprints are black.
• There are dots.

Which of these is a quantitative assessment?

• He is tall

• He jumps high

• He wears 23

• He is 6 feet 8 inches tall

Which is a qualitative assessment?

• He is 6 feet 8 inches tall.

• He weighs 265 lbs.

• He is strong.

• He wears a size 13 shoe.

In this graph, what is the independent variable? 

• Population
• Day
• Species 5

Tags

NGSS.MS-LS2-1

In this graph, what is the dependent variable? 

• Walla Walla Island
• Time
• Number of Deer

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Water fleas are placed in 40°C water and 20^oC water and their heart rates are determined. Which of the following would be the testable question for this experiment?

• Why does temperature affect the heart rate of water fleas?

• What is the effect of temperature on water fleas?

• What is the effect of temperature on the heart rate of water fleas?

• What is the effect of the heart rate of water fleas on temperature?