The Scientific Method

Which of the following would be an example of basic research?

Newton's discoveries of the laws of motion.

In an experiment, the hypothesis is If the wavelength of the light shining on a plant is shortened, the rate of photosynthesis is slowed down. If this experiment is performed, the dependent variable _____.

will be the rate of photosynthesis

Hypothesis

a proposed explanation for a scientific problem that itself can be tested by experimentation

Control

a quantity in an experiment that remains unchanged or constant

Choose a problem (Step 1)

come up with a question that can be answered

Basic research

research that expands knowledge in a particular area

Applied research

research that results in a product that can be sold for profit

Design an experiment (Step 4)

set up a procedure for testing your ideas; include variables and controls

Hypothesis (Step 3)

must be testable and falsifiable

Dependent variable

the experimental factor that changes in response to a change in the independent variable

Independent variable

the experimental factor that is changed by the scientist

In an experiment, the hypothesis is If the wavelength of the light shining on a plant is shortened, the rate of photosynthesis is slowed down. If this experiment is performed, the independent variable _____.

will be the wavelength of the light

Which of the following is the least reliable source of background information for a scientific project?

General internet site

Which of the following is a good scientific hypothesis?

If a plant is exposed to only blue light, the plant will grow more slowly.

Organize Data (Step 5)

create charts or graphs to display the results

Empirical evidence

observational evidence

Which of the following is an example of applied research?

producing a new drug to lower blood pressure

If a hypothesis is falsifiable, _____.

t must be possible to prove it wrong

In an experiment, the hypothesis is If the wavelength of the light shining on a plant is shortened, the rate of photosynthesis is slowed down. This hypothesis is _____.

testable falsifiable

In an experiment, the hypothesis is If the wavelength of the light shining on a plant is shortened, the rate of photosynthesis is slowed down. If this experiment is performed, _____.

the result can be determined

Research the problem (Step 2)

use reliable sources, talk to experts, and take notes