Notes Science Tennessee SPI Objective: SPI 0807.Inq.1 (Variables and Controls) Science Tennessee SPI Objective: Design a simple experimental procedure with an identified control and appropriate variables. Instructions for Students 1) Make sure you view this presentation in slideshow mode. 2) Press the right-arrow button on your keyboard to advance through this presentation. 3) If you need help, please communicate with your teacher. Essential Learning Students will examine the steps of the scientific method and key components of experiments to include independent and dependent variables, and controls. Check for Understanding Design and conduct an open-ended scientific investigation to answer a question that includes a control and appropriate variables.

Notes What Are Control Experiments? SPI 0807.Inq.1 (Variables and Controls) Notes Science What Are Control Experiments? Also called controls and/or control groups 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. How to do a control experiment: Just remove the independent variable entirely or replace it with a neutral independent variable. Video Link (7 min 34 sec): Controls, Variables, and Constants (Controls mentioned from 1 min 52 mark to 7 min 10 sec mark)

Experiment Notes Control Experiment (Fruity Pebbles Example) SPI 0807.Inq.1 (Variables and Controls) Notes Science (Fruity Pebbles Example) Experiment Does eating a sugary cereal make children hyperactive? Every day for a week have 3 children eat a bowl of Fruity Pebbles. Then observe their energy level for the next two hours. Manipulated/Ind Variable: -the cereal Responding/Dep Variable: -their behavior This is called the experimental group Next do a control experiment/control group (see next slide)

Notes Experiment Control Experiment (Fruity Pebbles Example) SPI 0807.Inq.1 (Variables and Controls) Notes Science (Fruity Pebbles Example) Experiment Does eating a sugary cereal make children hyperactive? Every day for a week have 3 children eat a bowl of Fruity Pebbles. Then observe their energy level for the next two hours. Manipulated/Ind Variable: -the Cereal Responding/Dep Variable: -their behavior Do a control experiment by simply removing the independent variable entirely or replace it with a neutral independent variable. Option 01: Repeat the experiment exactly except this time don't give the children any cereal at all. Option 02: Repeat the experiment exactly but give them a bowl of cereal that does not contain any sugar.

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. The independent variable is the distance from the sunlamp Corn plant 01 Corn plant 02 Corn plant 03 Do a control experiment by simply removing the independent variable entirely or remove its affect control experiment-place one other corn plant in a dark room

Notes Experiment Control Experiment (Energy Drink Example) SPI 0807.Inq.1 (Variables and Controls) Notes Science Experiment If you consume an energy drink before running will it enable you to run faster? On 3 different days at the track, consume one can of energy drink. (Day 1: Monster, Day 2: Red Bull, Day 3: Rock Star) Then run 30 meters as fast as you can. Record the time it takes you to run that distance. (Energy Drink Example) Manipulated/Ind Variable: -type of energy drinks Responding/Dep Variable: -how fast you run This is the experimental group Next do a control experiment (see next slide)

Notes Experiment Control Experiment (Energy Drink Example) SPI 0807.Inq.1 (Variables and Controls) Notes Science Experiment If you consume an energy drink before running will it enable you to run faster? On 3 different days at the track, consume one can of energy drink. (Day 1: Monster, Day 2: Red Bull, Day 3: Rock Star) Then run 30 meters as fast as you can. Record the time it takes you to run that distance. (Energy Drink Example) Manipulated/Ind Variable: -type of energy drinks Responding/Dep Variable: -how fast you run Do a control experiment by simply removing the independent variable entirely or remove its affect control experiment-run one more time without an energy drink or have a glass of water instead.

SPI 0807.Inq.1C Controls Questions Science

SPI 0807.Inq.1C Controls Questions Science

SPI 0807.Inq.1C Controls Questions Science