Variables
Parts of an Experiment
Correlations
Analyzing Data
Precision/Accuracy
100
What is an independent variable?
"What we change"
100
We use the scientific method to solve a...
problem!
100
What is a correlation?
Two variables have a relationship
100
What is quantitative data?
Numerical information
100
Define accuracy.
Closeness to the actual measurement
200
What is a dependent variable?
"What we measure"
200
Prior to forming a hypothesis, we must...
Gather information and research
200
Define causation.
One variable causes a change in the other
200
What is qualitative data?
Observations gathered using your five senses
200
Define precision.
Closeness of measurements to one another
300
What is a control?
Unchanged factor used for comparison
300
What are data?
Information (both qualitative and quantitative) gathered during an experiment
300
How are correlation and causation different?
One implies that there is a direct change caused by one variable in another while the other just states that two separate variables are related.
300
What graph is best for comparing averages?
Bar graph
300
Can something be accurate and not precise? Explain.
If the average of the measurements is close to actual measurement but they are not close together, the measurements are accurate but not precise.
400
Why are constants important?
To establish that change in the dependent variable is caused by the independent variable
400
What is a theory?
A generally accepted explanation for a scientific phenomenon based on continually supported evidence
400
Define positive correlation.
Two variables increase and decrease together.
400
What graph is best for analyzing change over time?
Line graph
400
Calculate percentage error if Laura measured the length of a table at 35 cm when the actual length was 32.1 cm.
9.03%
500
Name the independent, dependent, and control in this experiment:
Mr. Olivera is growing basil plants under different colored lights to see which allows for the greatest level of plant growth.
IV --> light color
DV --> plant growth
Control --> normal white light
500
Why is the scientific method considered "cyclical?"
When attempting to solve a problem, new problems arise that must then be investigated.
500
Define negative correlation.
There is an inverse relationship between two variables (one increases and the other decreases)
500
Describe the trend you see in this graph.
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As time has passed, the average level of arctic sea has decreased overall.
500
Calculate the percentage error if Mysha measure the volume of a cube at 150 mL but the actual volume was 130 mL. Was her measurement accurate? Explain.
15.38%
Her measurement was inaccurate.