BIol 10

Sample bias

-A group of units selected to be "measured" from a larger group (the population). -Introduced when the sample used is not representative of the population or inappropriate for the question asked.

Measurement Bias

-Is the method of data collection chosen in such a way that data collected will best match reality - Measurements taken accurately • No additions to the environment that will influence results • Experiment designed to isolate the effect of multiple factors

Second

Aims to explain the natural world

First

Focuses on the natural world

6. Explain whether scientific ideas are tentative or unchangeable

Tentative: • Unique feature of science • We get to change our ideas • Not forced to stick with an old idea

1. Identify and describe the two components to our definition of science.

a) Body of knowledge about the natural world (facts, theories, laws) b)Process/method of generating new knowledge about the natural world

9. Describe the role and importance of the peer-review process in science

• A journal that publishes articles only after they have been checked for quality by several expert, objective scientists from different institutions.

11. Explain the statement "Correlation does not equal causation."

• A phrase used in statistics to emphasize that a correlation between two variables does not mean that one causes the other.

Seventh

• Benefits from scientific behavior

2. Review the 7 items on the "Is it Science" checklist.

• Focuses on the natural world • Aims to explain the natural world • Use testable ideas • Relies on evidence • Involves the scientific community • Leads to ongoing research • Benefits from scientific behavior

5. Describe how scientists form hypotheses

• Hypotheses become theories which become laws.

4. Compare and contrast theories and laws in science

• In science, a theory is NOT a guess. • Theories are the goals of science • Theories result from all of the evidence • Scientific theories are based on evidence from the natural world

Fifth

• Involves the scientific community

Sixth

• Leads to ongoing research

3. Is Astrology a science? Explain why/ why not

• No because it does not meet the science checklist • It is not testable

12. Identify and describe the components of a good scientific study

• Objectivity is the key to good science • To be objective, experiments need to be designed and conducted in a way that does not introduce bias into the study.

Fourth

• Relies on evidence

• To be objective, experiments need to be designed and conducted in a way that does not introduce bias into the study.

• Sampling bias:• Measurement Bias:

10. Identify and provide examples of the lines of evidence commonly used in making claims

• Scientifically proven • Clinically proven

7. Why is objectivity important to science?

• To be objective, experiments need to be designed and conducted in a way that does not introduce bias into the study.

Third

• Use testable ideas