Graduate Scientific Method Questions

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Graduate Scientific Method

In a controlled experiment, the researcher typically manipulates one variable, called the independent variable, to determine how this variable affects the final outcome, called the dependent variable. In the following hypothetical example, a researcher applies varying amounts of fertilizer (0, 2, 4, 8, 10 units) to potted tomato plants. All other variables that may affect the outcome (watering, temperature, sunlight, plant size, etc.) are kept the same from pot to pot. At the end of the growing season, the tomatoes grown on each plant are weighed to determine which fertilizer level produces the largest tomato yield. Which variable was the independent variable and which was the dependent variable?

Independent = Fertilizer amount, Dependent = Temperature
Independent = Temperature, Dependent = Yield
Independent = Fertilizer amount, Dependent = Yield
Independent = Yield, Dependent = Fertilizer amount

Graduate Scientific Method

What does the term "theory" mean to a scientist?

A collection of accepted hypotheses that explain a wide range of natural phenomena
A guess
A proposed explanation for an observed phenomenon
A hypothesis that has been supported by the evidence of an experiment

Graduate Scientific Method

A recent commercial advertised for a wristband that claimed to restore health and balance by taking advantage of natural frequencies of your biofield. It even showed several people struggling to balance first without the wristband and then balancing fine with the wristband. For only $20 plus shipping and handling this device can be yours. Why should you be skeptical of the claims made in this ad?

Health cannot be tested via the scientific method
You cannot believe anything you see on television.
The study was too objective
It was not a controlled experiment

Graduate Scientific Method

Gathering information just to add to the knowledge base, such as measuring the beak length of various bird species, is known as .

discovery science
applied science
hypothesis-driven science
investigative science

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Graduate Scientific Method Questions