point of view that is personal rather than

scientific

bias

living things maintaining a relatively stable

internal environment

homeostasis

in an experiment, the variable that is manipulated

independent variable

the combination of chemical reactions through which an

organism builds up or breaks down materials

metabolism

a molecule containing the universal genetic

code

DNA

the study of life

biology

in an experiment, the responding variable

dependent variable

in an experiment, the group exposed to the same conditions as the

experimental group except for one independent variable

control group

a living planetbiosphere

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

An article that is undergoing ____________________ is

read carefully and checked by other scientists.

Peer review

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

A personal preference or point of view is

a bias

The smallest units in living things that are considered

to be alive are

cells

The process by which organisms keep everything inside their

bodies within certain limits is called

homeostasis.

How does sharing ideas through peer-reviewed articles help

advance science?

Scientists reading the articles may come up with new questions to study.

Who reviews articles for peer-reviewed journals?

anonymous and independent experts

Using a universal system of measurement is MOST important during which part of scientific methodology?a. asking questionsb. forming a hypothesisc. collecting datad. drawing conclusions

collecting data

A well-tested explanation that explains a lot of

observations is

a theory.

During a controlled experiment, a scientist isolates and tests

a single variable

The work of scientists usually begins with

careful observations

The basic unit of length in the metric system is the

meter

What are four scientific attitudes that help scientists generate new

ideas?

curiosity, skepticism, open-mindedness, and creativity

What is a bias?A bias is a particular preference or point of view that is personal

rather than scientific.

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.

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.