Which of the following variables present in Redi’s experiment on spontaneous generation is NOT a controlled variable?
a. the jars
b. the gauze covering
c. the type of meat
d. the temperature of the room

the big bang

What is the INDEPENDENT VARIABLE of the following experiment?
What effect does studying with music on have on student test scores?

general relativity (Einstein's work)

What is the DEPENDENT VARIABLE of the following experiment?
What affect does food color have on the amount of food fish eat?

When enough experimental data support a hypothesis, the hypothesis becomes a(an)...

A controlled experiment allows the scientist to isolate and test...
a. a conclusion
b. a mass of information
c. several variables
d. a single variable

A theory may be revised or replaced.
TRUE OR FALSE

Identify the INDEPENDENT AND DEPENDENT VARIABLE of the following experiment.
How do different types of chemicals in plant food affect plant growth?

In science, what is useful only if it can be tested?