Experimental Design + Variables

What step does every scientific experiment begin with?

• hypothesis

• question/problem

• procedures

• conclusion

The independent variable is the ONE thing you _____.

• change on purpose
• control or keep constant
• measure

The variable that is being measured or observed is called the _______________. Hint: this is the variable that is the result or effect

• independent variable

• dependent variable

• control variable

Why do we want to test one variable at a time?

• Because it is hard to setup a data table with more
• To know what is causing the changes. This helps us understand cause and effect.
• It is what has always been done

What is a constant/control in an experiment?

• Things that do not change in a experiment. It's the variable that stays the same. You can have many variables stay the same.

• It's the variables that the scientist changes in the experiment

• It's the variables that are being measured in an experiment

A series of steps used by scientists to solve a problem or answer a question. 

• scientific method
• recipe
• data collection
• metric system

What is an observation?

• A scientific statement based on ideas

• Using your senses to notice what is going on around you

• To be unaware of your surroundings

• The question that you want an answer to.

What is another word for hypothesis?

• evidence
• graph
• investigation
• prediction

A scientist is collecting data on the number of times a cricket chips per minute. What sense is the scientist most likely using to make observations?

• hearing
• smell
• sight
• touch

Mr. McNeice wanted to know if different types of music affected people's heart rates, so he played different music and checked their pulses.  What is the dependent variable?

• type of music
• heart rate
• how long they listend to music
• Mr. McNeice