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Question: discussions grades starhsh coeferzoom time elapsed hd a controlled experiment...

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Discussions Grades Starhsh CoeferZoom Time Elapsed Hd A CONTROLLED EXPERIMENT & THE VARIABLES 23 Minutes, 36 Secor A well-thought out sclentific study almost always has the following components The control and experimental groups . The independent and dependent variables Follett Discover The two sets are NOT the same. In other words, the control group is not the independent variuble and the experimental group is not the dependent variable Understanding the relationship within and between these two components is key to really understanding and analyzing the findings of scientific study. As sclentists manipulate the independent variable, they want to know if anything huppens to the dependent variable Usually the dependent variable is what is measured and comparisons are made between the experimentall and control groupi. Control & Experimental Groups The control group is a required component of a sclenteic study. it provides the nefenence point something to compare to. Sometimes it is based on a standand measurement ie body but there is almost ALWAYS some sort of control group The experimental group is compared to the control group. Usually there is one experimental group. but there may be more than one. Here are some situations that come up frequently Control Group Experimental The altered group Reference point normal No condition or iee. With the condition or dnease healthy people A standard o averaeThis va in bset of the inidence of of peoplel No treatment Treatmen Atered genetic make-u Subsequent time points Young Original technology Time O New technology Time 1 minute, 2 minubes, etc Ater
Homer notices that his shower is covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to check this this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of treatment there is no change in the appearance of the green slime on either side of the shower D Question 1 0.53 pts What is the control group? the half of the shower that was treated with water O the liquid or solution used to clean the shower O the growth of green slime O the half of the shower treated with coconut juice O 3 days of treatment with coconut juice was not sufficent to remove green sime O Coconut juice will remove the green slime if it is sprayed in the shower 0.53 pts D | Question 2 What is the EXPERIMENTAL group? O the half of the shower that was treated with water Ο the liqld or solution used to clean the shower the growth of green slime e the half of the shower treated with coconut juice e 3 days of treatment with coconut juice was not sufficent to remove green slime O Coconut juice will remove the green slime if it is sprayed in the shower
Independent & Dependent Variables The independent variable is the ditference between the control and experimental groups it is the factor that is being tested. There can be different levels of the Independent variable (e different time points, different amounts of a drug, etcl Another way to think of the independent variable and its relationship to the dependent variable ik the equation: у.mx.b The scientists set or manipulate the value of x the independent variable)l If you change x, then y the dependent variablel changes, too The scientists are investigating the values of y through the experiment. Please note that this equation is an EXAMPLE to understand the relationship, but the relationship between the two varlables may NOT always be linear As the scientists manipulate the independent variable, they want to know if anything happens to the dependent varlable. Usually the dependent variable is whut gets measured or quantified and then that value is compared between the control and experimental groups Usualy the question a scientist is asking fits intor As the independent variable changes (aoes up or downl whot hoppens to the dependent variable - I set the independent varlable at a certain value, whot happens to the dependent variable? OR think about cause and effect: where the cause ih the independent varabie and the effect is the dependent variable. Here are some situations that come up frequenthy INDEPENDENT DEPENDENT VARIABLE VARIABLE surgery, nutritional rate/body temperature looking at pictures istening to music etc.) The changes that happened over time Time The changes that happened through aging Cenetik makevp An exanple Question Does amount of time studying aftect students final grades? Hvpothesis: f students study for longer periods of time, they will receive better final grades Control Ciroup- no studying Experimental Group studyieg Independent Verble amount of time studying, difterent levels 1 houw, 2 hour, 3 hour, etc) Dependent Varlable final grades
Look back over Homers experiment treating the green slime in his shower. What is the the growth off green e O the hailt of the shower teted with coconut juice Coconut jice will nmove the green lime i it i sprayed in the shower D Question 4 0.53 pts What is the DEPENDENT variable Caconut ice will remove te reo lie i sprayed in the shower D Question 5 0.53 pts When sclentists have a suess as to whut might exglain an obnervation or phenomenon that they are studying, they develop a Thypothesis that they can begin to test. The resuts of a test may SUPPORT a hypothesh, or the resuts may EXCLUDE a hypotesis n Homers Shower Experiment what is his HYPOTHESIS when he begirs His experiment? Cocona jice will remove the preen sline i it is sprayed in the shower 053 pts in Homers 3hower Experiment what is his main CONCLUSION after he nevienes his nesuts
Texting in College Classrooms Common, Distracting Study found average student texted or read five texts during class oig2012 0.53 pts D | Question 7 After eading the about the study documenting the efflects of beating in the clnsroom, mutch the ollowing general scientiic study elements to the specific elements in THtS study Choose
Quetion Question 10 DI Question 11
Carbon Footprint of Typical U.S.Household: 48 Tons per Year D | Question 13 DI Question 14 052 ps O Queston 15
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