Chapter 1 Cont
What is the purpose of a controlled group in an experiment?
to find the effect at the independent variable
We collect data to determine temperature change in our classroom over the course of the school day. Which type of graph would best represent our findings?
A line graph. The temperature readings can be plotted and then connected to show the temperature variation over the course of the day
Repeated Trials
Are conducted to ensure the validity of the result
Treatments
Are the different ways the independent variable can be tested
You have gathered data to compare the number students that make up each grade level at Ridgeline High School. Which type of graph should you use to best represent your findings?
Bar graph. You are comparing different groups and the data are not continuous.
What do we call the items that are kept the same during controlled experiment
Controlled Variables
The independent variable can be tested by using different......
Controls
The variable which is measured in both the control group and the experimental group at the end of the experiment is the...
Dependent Variable
What part of a controlled experiment must be measured
Dependent Variable
Which part of a controlled experiment is left normal?
Experemental Group
In a controlled experiment, the control group and experimental group are designed to be identical except for one factor called the
Independent Variable
What do we call the variable in a controlled experiment that the researcher can change
Independent Variable
The control group is used as a standard of comparison
It may consist of objects that are not changed in any way or objects that are treated in the usual way.
What is the one difference between a controlled group and an experimental group
One (Which One) ahs an independent variable
What is a hypothesis?
Purposed expanation made on the basis of limited evidence
What are the controls in a controlled experiment
The controls are all factors that are kept the same in the two groups (control group and experimental group)
In a controlled experiment what is meant by constants or controlled variables?
The controls are everything that is kept the same in the control group and experimental group.
) How do you identify the dependent variable in an experiment?
The dependent variable is what is measured in both groups at the end of the experiment
What is the dependent variable in a controlled experiement
The effect of the independent variable
) How do you identify the experimental group in a controlled experiment?
The experimental group will contain the independent variable, or what is being tested in the experiment
What does a controlled experiement allow a scientist to test
The independent Variable
How do you identify the independent variable in a controlled experiment?
The independent variable is what is being tested in the experiment.
Why do we conduct many trials during an experiment?
To look for consistency in results which makes the results more valid
What is a theory?
a system of ideas intended to explain something
Quantitative Data
numerical data or counts
The statement "the work is two inches long" is what type of statement
quanitative data
Why do scientists carefully record the details of their experiments?
So other scientists can review their work and possibly repeat their experiments or even further their work.
Why do scientists publish their work
So others may validate thier results
The purpose of setting up an experiment as a controlled experiment is to ...
have a control group as a standard of comparison to see if the independent variable had an effect.
