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You must become familiar with the steps for carrying out well designed experiments.
Terms in this set (21)
A wondering (based on an observation) that may lead a scientist to design and perform an experiment.
An educated guess. This is the scientist's predicted outcome for the experiment.
It should be phrased: " If __, then __, because __."
A controlled test that attempts to find the answer to a scientist's hypothesis.
Information that a scientist collects from his or her experiment. It is used to support or reject their hypothesis.
The final opinion of a scientist, in regards to his hypothesis, after considering the data of the performed experiment.
In designing an experiment, these are kept the SAME throughout all trials to increase reliability of the data.
In designing an experiment, these are the things that change, they are NOT constant.
Independent/ Manipulated Variable
The variable that the scientist will manipulate, or change, to see how other things are affected.
Dependent/ Responding Variable
The variable that we measure. This variable RESPONDS (changes) when we MANIPULATE (change) the independent variable.
An experimental group that is not changed from "normal" conditions. It is used only to compare the other testing groups.
The conditions that do not change during an experiment.
How many variables can be changed at one time during a science experiment?
Why can't we change more than one variable at a time in an experiment?
Because then we won't know which variable is actually causing our results.
Example: If we put a plant under red light AND we water it twice as often as normal, it is impossible for us to know which one of these things actually affects the plant's growth.
The Independent variable is plotted on which axis?
The Dependent variable is plotted on which axis?
Information about the world around us obtained through the five senses. ("I notice...")
What you observe, combined with background knowledge you already have.
Example: I observe that there is an open flame on the stovetop. I know that fire is hot. I can infer that the stovetop is hot and shouldn't be touched.
A thoughtful, reasoned guess about something that will happen in the future based on your observations and background knowledge you already have.
Example: I observe that there are lots of dark grey clouds in the sky. I know that dark grey clouds usually mean rain. I predict that it will rain soon.
A written discussion of the data and observations gathered from an experiment. An explanation of what the data shows and what it means.
What does DRY stand for?
Y- y axis
What does MIX stand for?
M - manipulated
I - independent
X - X axis
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