course material

1. [From 10$/Pg] Good Hint Would Also
[From 10$/Pg] Good Hint Would AlsoImportance of Controls – Biology in the News Part
2Directions for Part 2This discussion assignment is worth 10 of the 30 total points given for
the assignment, “Biology in the News”. This portion of the “Biology in the News” assignment
will be completed after you have submitted the original assignment.Using the article you
analyzed for “Biology in the News” summarize the following points:What were the results
that were obtained (from the experimental system used)?What were the controls that were
used (which variables were kept constant?)What was the purpose for using those specific
controls (what does it rule out?)It’s likely that the controls were not explicitly mentioned in
the article, but make an educated guess as to what they would be. A good hint would also be
to look at the journal abstract of the article.Please be sure your chosen article is an
EXPERIMENT. A “study” is often just observational, and no controls are set.Review BOTH
resources below to understand Controls:Here is a link to information about controlled
experiments (Links to an external site.) as presented by the Khan Academy.Review this
power point presentation on The Scientific Method More helpful information about
controls:How do I determine the controls in the article I chose? Here is some information to
help you:Let’s suppose you are studying birds and want to learn about their feeding habits.
Questions you have may include:What time of day do the birds most often come to the
feeder?What time of the year do birds most often come to the feeder?What type of food do
the birds prefer (given a finite number of types)?Where do birds prefer the feeder to be
located?And there are probably more you can think of. BUT, scientists only set up an
experiment to answer ONE question at a time. ALL the other conditions must remain the
same. We call those CONTROLS. We can’t accurately come to a conclusion if there is more
than one variable at a time. Take a look at the experimental design chart below. Without any
other information, can you tell what variable and controls are set?The experimenters here
must have placed all three feeders in the same place, with the same food, at the same time,
in a feeder that has the same construction. The only difference is the color of the feeder. So,
the variable they are testing is the color and the controls are the time, shape, food type, and
place. When we recorded the results, if there is a significant difference in the amount of food
consumed between each of the feeders, we will be able to conclude that COLOR is a
significant factor in where birds like to eat.I found a video showing an experiment that
demonstrates all the bulleted points listed above and more. It’s all about testing the “5-
second rule”. DIY Science – The Five-Second Rule. You can also look up other videos on
controls if you have additional questions.In the above video, pay close attention tothe

2. controls and reason for themthe reason for setting up replications of each situationhow the
experiment is set up.———————–SEE THE ATTACHMENT FOR PART 1