Instructions 1) Go to work station one, and pick up a copy of the quiz study guide. 2) Write your first and last name in the top/right corner. 3) Beneath your name, write today's date 4) Beneath the date, write the class period. 5) Wait silently for additional instructions. Bell Work SPI 0807.Inq.1 (Variables and Controls) Aug 20, 2014 Press the Right Arrow Button to Advance through the Presentation!

SPI 0807.Inq.1 (Variables and Controls) Today's Plan Plan 1) Explain/Discuss bellwork 2) Emphasize objective(s) 3) Ask about birthdays 4) Continue collecting forms from my homeroom students 5) View and discuss notes about control experiment 6) Complete study guide in class 7) (Time permitting) dependent variable review activity at work stations WRITE THIS IN YOUR AGENDA! Homework: Study for quiz Science

What Are Control Experiments?  An experiment to verify the results of another experiment using the same conditions except for one factor or variable  An experiment separated from the main experiment where the independent variable being tested cannot influence the results.  Simply remove the independent variable entirely or replace it with a neutral independent variable. Notes SPI 0807.Inq.1 (Variables and Controls) Also called control groups Press the Right Arrow Button to Advance through the Presentation!

Example: A student conducts an experiment to determine which type of ballpoint pen will last the longest before running out of ink. Experimental Group  Uses 3 types of ink ballpoint pens in a series of experiments (Blue ink pen, Black ink pen, red ink pen) SPI 0807.Inq.1 Variables and Controls Notes The independent variable is…the color of the ink in the pens A dependent variable is… Describe a control experiment for this example: How long the ink lasts HINT: Just eliminate the effect of the independent variable Control Experiment: Instead of a ballpoint pen, repeat the experiment using some kind of non-ballpoint pen (like a Sharpie for example)

Experimental group  All the details of the series of experiments using the 3 types of ballpoint pens Control group  All the details of the 3 non-ballpoint pens SPI 0807.Inq.1 Variables and Controls Notes

Example: A scientist is conducting an experiment to test how sunlight affects plant growth.  She places one corn plant 1 meter away from a sunlamp.  She places one corn plant 2 meters away from a sunlamp.  She places one corn plant 3 meters away from a sunlamp. Notes SPI 0807.Inq.1 (Variables and Controls) The independent variable is…the distance from the sunlamp A dependent variable is… Describe a control experiment for this example: the plant growth HINT: Just eliminate the effect of the independent variable Control Experiment: Place a corn plant in a dark room with no sunlight and observe what happens.

Experimental group  All the details of the series of experiments with the sunlamp and the three corn plants Control group  All the details of the experiment in the dark room with a corn plant and no sunlight SPI 0807.Inq.1 Variables and Controls Notes

Example: A student conducted an experiment to determine if energy drinks can help you run faster. Here is the experimental group 1 st trial: Day 01-Run 30m after drinking Monster energy drink 2 nd trial: Day 02-Run 30m after drinking Red Bull energy drink 3 rd trial: Day 03-Run 30m after drinking Rock Star energy drink Notes SPI 0807.Inq.1 (Variables and Controls) The independent variable is…the type of energy drink A dependent variable is… Describe a control experiment for this example: How fast they run HINT: Just eliminate the effect of the independent variable Control Experiment: Have them run without consuming any energy drink. You could give them a glass of water instead, or give them nothing at all.

Experimental group  All the details of the series of experiments with the runners and the 3 different types of energy drinks Control group  All the details of the experiments with the runners without any energy drinks SPI 0807.Inq.1 Variables and Controls Notes