pre lab 1 quiz

What was the dependent variable in this expenment?

Number of pillbugs in each side of the chamber

What was the independent variable in this experiment?

Substrate (cornstarch or sand))

What was one purpose of the control chamber in this experiment?

To show whether pillbugs have an preference for a certain side of the chamber.

Which of these is/are benefits of measuring multiple samples during an experiment?

To reduce sampling error due to variation in samples or participants

To reduce measurement error

Recall that controlled variables (aka standardized variables) are things that are held constant across all experimental treatments. Which of these was NOT a controlled variable in the pillbug preference virtual experiment you performed?

type of substrate (cornstarch or sand)

Sometimes experimental results do NOT support the hypothesis that the experiment set out to test. When this happens, did the experiment "fail?"

No, a hypothesis is just one possible answer to the research question. If the results don't support it, then maybe we need to test a different hypothesis.

BIOL 1114 students were interested in how gender influences a person's height.

What is the independent variable in this experiment?

gender

The data in this graph are based on an experiment comparing the amount (mass in grams) of flling in DoubleStuf Oreos and regular Oreos, to answer the question of whether DoubleStuf Oreos are really double-stuffed.

What needs to be added to the x-axis of this graph?

Type of Oreo

Which of these statements about science is accurate?

Scientific knowledge is based on the available evidence.

Which experimental variable is usually displayed on the x-axis of a graph?

The independent variable

According to this graph, when in 2005 was the ozone hole in the Earth's atmosphere largest?

September 15