1.1-1.7 Notes


Terms in this set (...)

6 characteristics of life
1. It Moves
2. It responds to its environment
3. It grows and develops
4. It reproduces
5. It uses energy
6. It is made of cells.
Testable questions
Are measurable
Are specific
And could be experimented on
Non-testable questions
Too broad
Based on research
An educated guess about a testable question. It is in an if-then-because format.
Test subject/s
The subject of the experiment who or what is being tested or changed by the experiment.
Control group
The group used for comparison because it is "normal"
Experimental group
The group that gets the change ( experimental treatment ) and is compared against the control group
Independent variable
In every experiment, the independent variable is the thing we change in order to see the effect it might have
Dependent variable
The dependent variable is the thing we measure-it's the effect on the independent variable
Control variable
It's anything in the experiment that we are keeping the same and not changing. Helps the validity of the experiment so that only the independent variable and dependent variable are being tested and evaluated. Since they don't change this allows the relationship between the independent and dependent variables to be better understood
In a valid experiment...
everything is kept the same, or controlled (constant), except the independent variable
An experiment is flawed if...
It's missing a control group
The control group has also gotten a treatment, or change in the independent variable
The experimental group had multiple independent variables changed
There aren't enough controlled variables
Explanation =
Claim: What do you know?
Evidence: How do you know that?
Reasoning: Why does your evidence support your claim?
A conclusion statement that answers a question.
*Usually 1 sentence long
*Must completely answer the question
*In a lab report, your claim states that your hypothesis either is or is not supported by the evidence you gathered in the lab.
The data (information) that supports your claim
*sufficient: Use enough evidence to support the claim
*appropriate: Use data that supports the claim =. Leave out data that doesn't support the claim.
2 types of data
1) Qualitative: Using the senses
2) Quantitative: Numbers, combinations, or both
The explanation that connects your claim.
*Shows why the data you chose counts as evidence for your claim
*This explanation acts as a conclusion of your experiment
*It shows a detailed understanding of the scientific principles involved
*The reasoning should at least 2-3 sentences in length.
Bar chart
Used to compare amounts
Line graph
Used to show change over time or the effect of an independent variable on the dependent variable.