Bell Work Sept 1, 2015 SPI 0807.Inq.1 (Variables and Controls) 1.Three red trees are kept at different humidity levels inside a greenhouse for 12 weeks.

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Bell Work Sept 1, 2015 SPI 0807.Inq.1 (Variables and Controls) 1.Three red trees are kept at different humidity levels inside a greenhouse for 12 weeks. One tree is left outside in normal conditions. Height of the tree is measure once a week. What is the independent, dependent, and controlled variables. 2.What equipment do you use to find mass? 3.What are the units to mass? 4.Find the Density if the mass of a cube is 10 g and each side is 5cm.

SPI 0807.Inq.1 (Variables and Controls) Today's Plan Plan 1) Explain/Discuss bellwork 2) Emphasize objective(s) 3) Review Variables 3)Variables worksheet You must turn the worksheet in before you leave. It will be CHECKED for a grade!! WRITE THIS IN YOUR AGENDA! Homework: NONE Science

In an experiment…  …you should only test for ONE key thing at a time When you repeat the experiment…  …only change this ONE key thing This one thing is called… Notes SPI 0807.Inq.1 (Variables and Controls) Independent Variables

Notes SPI 0807.Inq.1 (Variables and Controls) Science What Is A Dependent Variable?  Often called the "responding variable" because it is the response to the factor that was previously introduced  These are the results that you observe after you introduced the independent/manipulated variable  In other words, anything that "changes on its own" while the experimenter is observing it will be a… Also called "Responding Variable"

Notes SPI 0807.Inq.1 (Variables and Controls) Science What Is A Contolled Variable?  In an experiment, the control variable is something that is constant and unchanged.  Further, a control variable strongly influences values; it is held constant to test the relative impact of independent variables.  In other words, if not held constant it will affect your results and make them invalid.