Experimental Design & Variables

What step does every scientific experiment begin with?

• hypothesis
• question/problem
• procedures
• conclusion

What is an if....then... statement that predicts the outcome of an experiment?

• Conclusion
• Materials
• Hypothesis
• Problem

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

• The height of the plant
• The size of the pot
• The amount of water
• The amount of light.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

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

If I water the plant more often, then it will grow taller. Which of these is not a controlled variable?

• The amount of soil.
• The pot size.
• The type of plant.
• The amount of water.

Tags

NGSS.MS-LS1-5

When writing your hypothesis, what information follows IF?

• dependent variable
• how you know it will happen
• independent variable
• anything 

The summary at the end of an experiment that explains the results. 

• conclusion
• procedures
• materials
• responding variable

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

What is the effect of salt water on the growth of grass?

The above question is an example of:

• Hypothesis

• Conclusion

• Experiment

• Problem/Question

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

A possible explanation for a set of testable observations, an educated guess.

• science
• scientific method
• data
• hypothesis

What you change in an experiment...

• Independent variable

• Dependent variable

• controlled variables

• data