Experimental Design

If you were testing how well different dish soap cleaned grease, the independent (experimental) variable would be the:

• Dishes
• Water
• Dish Soap
• Types of Grease

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

Which of the following questions would be an appropriate SCIENTIFIC question that could be tested by experimentation?

• Which type of bread goes moldy the fastest?
• Where do we go when we die?
• Is it a sin to transplant pig hearts into humans?
• Are llamas less valuable than camels?

Tags

NGSS.MS-LS1-5

While PERFORMING AN EXPERIMENT, it is important to:

• change the control setup
• test many different variables at the same time
• reach a conclusion
• record observations and measurements

Which phrase describes a hypothesis?

• reviewing information related to the problem
• testing a factor, or variable, in an experiment
• suggesting a solution to a problem after studying it carefully
• performing a controlled experiment

An orderly, systematic approach to problem solving is called the:

• experiment
• science procedure
• scientific method
• hypothesis

"If the forest is clear-cut (cutting down all the trees in an area of forest), then it will result in drier soils because there will not be any trees to protect the soil from sunlight" is an example of:

• a theory
• a hypothesis
• an experimental question
• a conclusion

In order for the conclusion of a scientific experiment to be convincing, the researcher must report adequate evidence supporting or refuting the hypothesis.  Scientific evidence should include the:

• results from an experiment with just one trial
• results from only the trials that produced the expected results (the other "bad" data should be thrown out!)
• results from multiple trials of one experiment, including unexpected results
• results from multiple different types of experiments, including unexpected results

Changeable elements of an experiment which can affect the outcome of the experiment if not carefully controlled are called:

• placebos
• variables
• quantitative elements
• control groups

Tags

NGSS.MS-PS2-2

Data such as "10 drops" is referred to as ___________.

• robust data
• qualitative data
• control data
• quantitative data

The number of variables that should be allowed to change in a well designed, controlled experiment is: 

• none
• 1
• 2 or more
• dependent on the type of experiment

Tags

NGSS.MS-PS2-2