Biology 1.1-What is Science

The state ment "The worm is 2 centimeters long" is a(n)? a. observation b. theory c. inference d. hypothesis

Answer: a.

Which of the following statements about a controlled experiment is true? a. All the variables must be kept the same. b. Only one variable is tested at a time. c. Everything can be studied by setting up a controlled experiment. d. Controlled experiments cannot be performed on living beings.

Answer: b

An inference is.... a. the same as an observation b. a logical interpretation of an observation c. a statement involving numbers d. a way to avoid bias

Answer: b.

To be useful in science, a hypothesis must be.... a. measurable b. observable c. testable d. correct

Answer: c.

Goals of Science

To produce more and more accurate natural explanations of how the natural world works.

Hypothesis

a educated guess

Independent Variable

a variable that is deliberately changed

Dependent Variable

a variable that is observed and that changes in response to the independent variable

Control Variable

is a variable that is controlled and not changing

Control Group

is exposed to the same conditions as the experiment group except for one independent variable

Data

is recorded information