Variables
Experiments & Scientific Investigation
Observations & Inferences
Measurement
Graphing
100
This is the variable that a scientist purposely changes during an experiment.
What is the independent variable?
100
A student tests four fertilizers, but uses a different type of plant for each fertilizer. What is the major problem with this experiment?
The student is testing more than one variable at a time.
100
"There are four words in the question." This is what type of observation?
What is a quantitative observation?
100
This is the basic unit used to measure length.
What is a meter?
100
In a graph showing temperature vs. plant heigh, this is the independent variable.
What is temperature?
200
This is the variable that is measured or observed as a result of an experiment.
What is the dependent variable?
200
This is an educated prediction about what will happen in an experiment. Uses If... Then... Because...
What is a hypothesis?
200
"There are blue letters on the napkin." This is what type of observation?
What is a qualitative observation?
200
This is the basic unit used to measure volume.
What is a liter?
200
What does DRY stand for? (Dry-Mix)
What is Dependent, Responding, Y-axis?
300
A scientist tests how different amounts of sunlight affect plant growth. What is the independent variable?
What is the amount of sunlight?
300
Why should scientists change only one variable at a time in a controlled experiment?
So differences in the results can be linked to the independent variable.
300
This type of observation uses numbers or measurements.
What is a quantitative observation?
300
This is the basic unit used to measure mass.
What is a gram?
300
What does MIX stand for? (Dry-Mix)
Manipulated, Independent, X-axis
400
In an experiment testing how fertilizer affects plant height, plant height is this type of variable.
What is the dependent variable?
400
This is the question that an experiment is designed to test.
What is the problem/problem statement?
400
This is a conclusion or explanation made from observations and prior knowledge.
What is an inference?
400
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Read this Graduated Cylinder.
What is 24mL?
400
This type of graph is the best kind to use when observing data over time.
What is a line graph?
500
A scientist keeps the type of plant, amount of soil, pot size, and amount of water the same while changing the amount of fertilizer. These are called what?
What are controlled variables?
500
A scientist repeats an experiment several times and increases the number of plants tested. Why does this help make the experiment more valid?
It makes the results more reliable by increasing the number of trials/samples.
500
"Coffee is the best drink to help start the day." What type of statement is this?
Hint: the answer is NOT opinion
What is bias?
500
This scientific instrument is designed to measure the volume of a liquid accurately.
What is Graduated Cylinder?
500
This type of graph is best used when you have categories of data for one specific place in time.
What is a bar graph?