Investigation vs. Experiment

Matt wants to test which liquid freezes first: Pepsi, milk, or apple juice.  He poured 50 mL of each into separate glasses and placed them in his freezer.  Every ten minutes, he checked his freezer and recorded his observations.  Pepsi froze first, followed by apple juice and then milk.  What is his dependent variable?

• type of liquid
• length of time until frozen
• amount of liquid
• location of freezer

Betty wants to test which type of phone has the longest battery life.  She is comparing iPhone 6 Plus, Samsung S5,  and a Droid.  She bought each phone new and charged them completely to 100%.  Then, she turned each phone on and timed how long until the battery ran out.  What is the independent variable in her experiment?

• brand of phone
• time until battery ran out
• time it took to charge to 100%
• outlet used for charging

What step does every scientific experiment begin with?

• hypothesis
• question/problem
• procedures
• conclusion

The factors in an experiment that can be changed. 

• variables
• quantitative data
• hypothesis
• quantitative data

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

• conclusion
• procedures
• materials
• responding variable

The process of gathering information

• analyzing
• hypothesizing
• inferring
• observation

A(n) ____________ is a special type of scientific investigation that is performed under controlled conditions.

• experiment
• lab
• inquiry
• hypothesis

This part of the experiment serves as a basis of comparison; the one variable being tested has been omitted. 

• experimental group
• control group
• data
• variables

What is ALWAYS kept the SAME during an experiment?

• Controlled Variable
• Manipulated Variable

If you are given a picture and asked to make an OBSERVATION, you must choose the answer that includes only - 

• things that you can actually see with your own eyes
• things that you can guess easily
• things that are given to you
• things that are told to you