Scientific Method

Front

Effect of acids on plant health: Experiment with acidic solutions vs. neutral pH 7 control.

Back

High acidity is harmful to this type of plant.

Front

Graph of atmospheric CO2 levels since 1880 shows:

Back

CO2 levels have been rising at an increasingly higher rate over the past century.

Front

Research shows damselflies contract protozoan infections from prey. The graph indicates infection rates in summer and early fall.

Back

Infection in embanked ponds increased during the sampling period.

Front

Carmen's experiment on music's effect on pulse involved 7 music selections, each for 30 seconds, measuring pulse before, during, and after. Conclusion: pulse rate changes with music. Missing component?

Back

a control group

Front

Osmosis investigation with chicken eggs showed that water enters cells in high water concentration environments.

Back

Water enters the cell when placed in environments of high water concentration.

Front

Acceptance criteria for a scientific theory:

Back

widely tested and supported by extensive data

Front

Effect of a variable in an experiment

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a single variable

Front

Basic scientific assumption:

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If a conclusion is valid, similar investigations by other scientists should yield the same result.

Front

Conclusions accepted when consistent with experimental data and observations.

Back

Consistent with experimental data and observations.

Front

Experiment on caffeinated soda's effect on pulse rate: Group A (caffeinated) vs. Group B (caffeine-free). Same age, same amount of soda. What is the dependent variable?

Back

Pulse rate of each group.