Experimental Design

What is the first step a student takes when they want to conduct an experiment?

• collect data

• write a problem

• make a hypothesis

• collect data

This variable in an experiment being changed by the scientist. 

• dependent variable
• independent variable
• control variable
• control group

Experiments repeated over and over again increase the accuracy or __________ of the experiment.

• error

• variable

• validity

• success

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

• conclusion
• procedures
• materials
• responding variable

A factor that is measured in an experiment?

• control
• constant
• independent variable
• dependent variable

The part of the experiment that does not contain the independent variable. Used for comparison.

• Control Group
• Experimental Group
• Results
• Data

What is the affect of salt water on the the height of blades of grass?

What is the independent variable in the above question?

• salt water

• height

• average

• affect

What is an if....then statement that predicts the outcome of an experiment or how the Independent variable effects the dependent variable?

• Conclusion
• Materials
• Hypothesis
• Problem

Students used various temperatures of water to see which one dissolved candy faster. 
What was the Independent Variable?

• Amount of Candy
• Amount of Water
• Temperature of Water
• Time for Candy to Dissolve

If plants receive more water, the number of leaves will increase. 
This is an example of 

• Testable Question
• Hypothesis
• Variables
• None of the above