Using the Scientific Method & Metric System

Multiple Choice

What type of thinking is unbiased?

• objective

• subjective

• creative

Multiple Choice

What part of the scientific method is usually an "if / then" statement, or a prediction that can be tested?

• observations

• hypothesis

• controlled experiment

• conclusions

Multiple Choice

If a null hypothesis is refuted (proven false), it indicates that ...

• the scientist should find another profession

• the alternative hypothesis is supported

• the alternative hypothesis is also false

​Null Hypothesis & Chi Square

We will discuss these topics in more detail later in the semester.

Multiple Choice

A controlled experiment should have how many groups?

• Only one

• At least two

• No less than 5.

Multiple Choice

An experiment is performed to see the effects of fertilizers on pond water. Two similar sized ponds are located. The scientist adds a liter of water soluble fertilizer to pond A once a week for six weeks. Nothing is added to pond B. At the end of the six weeks, the turbidity of the water in both ponds is measured as an indicator of algal growth.

What is the independent variable?

• addition of fertilizer

• pond water

• turbidity (cloudiness of the water)

• passing of 6 weeks time

Multiple Choice

An experiment is performed to see the effects of fertilizers on pond water. Two similar sized ponds are located. The scientist adds a liter of water soluble fertilizer to pond A once a week for six weeks. Nothing is added to pond B. At the end of the six weeks, the turbidity of the water in both ponds is measured as an indicator of algal growth.

What is the control?

• pond A

• pond B

• the amount of fertilizer

• the turbidity

Multiple Choice

An experiment is performed to see the effects of fertilizers on pond water. Two similar sized ponds are located. The scientist adds a liter of water soluble fertilizer to pond A once a week for six weeks. Nothing is added to pond B. At the end of the six weeks, the turbidity of the water in both ponds is measured as an indicator of algal growth.

What is the dependent variable?

• amount of fertilizer added
• size of the ponds
• frequency of measurements
• turbidity of the water

Multiple Choice

What is the name of the changing part of an experiment that is intentionally manipulated by the scientist?

• independent variable

• dependent variable

• control

Multiple Choice

What is the name of the part of an experiment that responds to the change in the independent variable?

• manipulated variable

• dependent variable

• control

Multiple Choice

What system of measurement is typically used in science?

• British Imperial System

• United States Customary System

• The Metric System

Multiple Choice

As of the most recent data, the current level of carbon dioxide in the atmosphere is around 421 parts per million (ppm), which is considered a record high level.

What type of data is "421 parts per million"?

• quantitative

• qualitative

​The graph is improved by adding a title and labels.

Match

Matching

• Estimating data beyond data points

• Estimating data between data points

• Inferring values from a set of known data

Extrapolation

Interpolation

Estimation

• Extrapolation

• Interpolation

• Estimation

Multiple Choice

Which of these may be untested, or have the least amount of evidence?

• hypothesis

• theory

• law

Dropdown

Answer part C of the question on the previous slide. An increase in ethyl alcohol causes a(n)​ ​

Select answer

in the volume of urine output.

​800,000 cm

​