1. point of view that is personal rather than scientific
bias

2. living things maintaining a relatively stable internal environment
homeostasis

3. in an experiment, the variable that is manipulated
independent variable

4. the combination of chemical reactions through which an organism builds up or breaks down materials
metabolism

5. a molecule containing the universal genetic code
DNA

6. the study of life
biology

7. in an experiment, the responding variable
dependent variable

8. in an experiment, the group exposed to the same conditions as the experimental group except for one independent variable
control group

9. a living planet
biosphere

10. A scientist working in the early 1900s came up with a hypothesis
A scientist working in the early 1900s came up with a hypothesis. Over the next 100 years, other scientists tested the hypothesis and found that it could make predictions about numerous new situations time and time again. This hypothesis can now rightfully be considered a ________________________
theory

11. An article that is undergoing ____________________ is read carefully and checked by other scientists.
Peer review

12. After a scientist publishes a paper, someone else finds evidence that the paper’s hypothesis may not be correct. The scientist is unhappy, but studies the new evidence anyway. The scientist is showing which scientific attitude?
open-mindedness

13. A personal preference or point of view is
a bias

14. The smallest units in living things that are considered to be alive are
cells

15. The process by which organisms keep everything inside their bodies within certain limits is called
homeostasis.

16. How does sharing ideas through peer-reviewed articles help advance science?
Scientists reading the articles may come up with new questions to study.

17. Who reviews articles for peer-reviewed journals?
anonymous and independent experts

18. Using a universal system of measurement is MOST important during which part of scientific methodology? a. asking questions b. forming a hypothesis c. collecting data d. drawing conclusions
collecting data

19. A well-tested explanation that explains a lot of observations is
a theory.

20. During a controlled experiment, a scientist isolates and tests
a single variable

21. The work of scientists usually begins with
careful observations

22. The basic unit of length in the metric system is the
meter

23. curiosity, skepticism, open-mindedness, and creativity
What are four scientific attitudes that help scientists generate new ideas?
curiosity, skepticism, open-mindedness, and creativity

24. What is a bias?
A bias is a particular preference or point of view that is personal rather than scientific.

25. Can a theory change over time? Explain your answer.
A theory can change over time. No theory is considered absolute truth. As new evidence is uncovered, a theory may be revised or replaced by a more useful explanation.

26. How does peer review improve the overall quality of a scientist’s work?
When scientists have articles peer-reviewed, they will find out if there are any mistakes or oversights in their work. They can then fix these mistakes. Peer review also keeps scientists honest. Scientists cannot pass off false data or make inaccurate conclusions because they know their work will be reviewed by experts.