Scientific Method/Making Connections Lab

Which statement best describes a hypothesis?

• It is process the process of making careful observations.

• The conclusion drawn from the results of an experiment is a part of the hypothesis.

• The facts collected from an experiment are written in the form of a hypothesis.

• A hypothesis serves as a basis for determining what data to collect when designing an experiment.

Graphs and tables present information in a clear, organized way?

• True

• False

Muscle fatigue occurs when

• carbon dioxide is used up in the muscle cells

• simple sugar is converted to starch in the muscle cells

• proteins accumulate in mitochondria in the muscle cells

• certain waste products collect in the muscle cells

Tags

NGSS.MS-LS1-7

An investigation is carried out to determine the effect of exercise on the rate at which a person can squeeze a clothespin.

In this investigation, the independent variable is the

• exercise

• number of participants

• rate of squeezing

• control

Which statement best describes a controlled experiment?

• It eliminates the need for dependent variables.

• It shows the effect of a dependent variable on an independent variable.

• It avoids the use of variables.

• It tests the effect of a single independent variable.

An increase in heart rate will most likely result in

• a decrease in metabolic rate

• an increase of cell division

• an increase in pulse rate

• a decrease in body temperature

Tags

NGSS.HS-LS1-3

Which statement about the use of independent variables in controlled experiments is correct?

• A different independent variable must be used each time an experiment is repeated.

• The independent variables must involve time.

• Only one independent variable is used for each experiment.

• The independent variables state the problem being tested.

The analysis of data gathered during a particular experiment is necessary in order to

• formulate a hypothesis

• develop a research plan

• design a control

• draw a valid conclusion

Tags

NGSS.MS-ETS1-3

NGSS.MS-PS1-2

In an appropriately designed experiment, a scientist is able to test the effect of

• scientific observations

• multiple variables

• the hypothesis

• a single variable

Tags

NGSS.MS-LS1-5

A student designed an experiment to determine if air temperature had an effect on the rate of photosynthesis in corn plants.

The independent variable in this experiment is

• number of corn plants used

• amount of carbon dioxide used by the corn plants

• volume of oxygen produced by the corn plants

• air temperature at which the corn plants were grown

Tags

NGSS.MS-LS1-5