Scientific Method - Bio

A hypothesis is-

• a possible explanation of an observation that can be tested
• a proven statement
• a conclusive statement
• a definite answer to a possible problem

You suggest that the absence of water could prevent the growth of bread mold. This is-

• a hypothesis
• a conclusion
• an experiment
• an analysis

Tags

NGSS.MS-LS1-5

The purpose of a controlled experiment is to allow a scientist to isolate and test-

• a single variable
• several variables
• many data
• a conclusion

The variable that is measured in the experiment is-

• the dependent variable
• the independent variable
• the control variable
• the hypothetical variable

The main reason that diagrams, tables and graphs of data are used by scientists is to-

• organize data
• verify the conclusion
• test a hypothesis
• create an experiment

Which of the following must be done for the results of an experiment to be considered valid?

• the experiment must be repeated numerous times and the same results are obtained
• the results must be published in a national journal
• the results must be shown in a graph
• the results must be only quantitative

In a controlled experiment, how many variables can be worked with at a time? 

• one
• none
• two or more
• how ever many makes sense.

Anything that can change in an experiment.  There are three types of these in an experiment.

• variables
• constant
• independent
• dependent

This variable in an experiment is the one being changed by the scientist. 

• dependent variable
• independent variable
• data
• control group

In order to be accepted, a scientific theory must be

•  widely tested and supported by extensive data
•  based on the results of a single experiment
•  controversial and cause debate
•  in line with all previous historical ideas

Tags

NGSS.HS-LS4-1

NGSS.HS-LS4-2