Scientific Method
A specific and testable question about an observation
hypothesis
If you need to measure water in a beaker, you would use this metric system unit.
Liters (L)
The variable that the scientist controls
independent variable
The number of experimental trials completed
3
The number of questions on a biology quiz
10
The steps of the experiment
Procedure
How many millimeters are in 1 meter?
1000 mm
“I am measured, not manipulated.” Who am I?
dependent variable
The units that heart rate is measured in
Beats per minute (BPM)
Write 5,600 in scientific notation.
5.6 × 10³
Restating hypothesis, discussing the results and the importance of the experiment would happen in the…
Write 0.00042 in scientific notation.
4.2 × 10⁻⁴
During an experiment, the group that is conducted under normal conditions to establish baseline data is called…
control group
The independent variable of the experiment
the different exercises
Students test three fertilizers but use different amounts of water for each plant. What’s wrong with the experiment?
Water is not controlled. It could affect plant growth, making it impossible to know whether fertilizer caused the results.
A scientist records that the plants are brown, wilted, and dying. This is _______ data.
Qualitative
What is 25% of 80?
20
Scientists are testing a new drug on rats. Rats given the drug would be in the _______ group.
Experimental
The dependent variable of the experiment
heart rate after exercise
A scientist records that the plant is 18cm tall and its seeds weigh 2g. This is __________ data.
Quantitative
null or alternative: The color of light does not impact plant growth
null
A sample changes from 40 g to 52 g. What is the percent change?
30%
You want to test whether temperature affects how quickly yeast produces CO₂. Identify the independent variable, dependent variable, and one control variable.
The style of graph you used to display data table 2
A student accidentally spills some of their sample before measuring it but continues the experiment without recording the mistake. What should they have done?
Report/record the error and, if possible, repeat the trial with a new sample.