In an experiment there should be only one

Which is not an observation?

Quantitative or Qualitative? There are 10 blue birds.

Quantitative or Qualitative? There are blue birds, red birds, and yellow birds.

In a scientific experiment, how many independent variables should be tested at the same time?

A student designed an experiment to test the effect of temperature on bacterial growth. He grew three identical cultures of E.coli in three identical incubators at different temperatures. What is the independent variable in this experiment?

How would scientists show a comparison between variables?

Three students measured the height of a lab table, each using a different meter stick. One student reported a height of 98cm, another reported a height of 99 cm and the last student reported a height of 56cm. What was probably the problem?

Quantitative or Qualitative? Rainbows are more beautiful after fall rainstorms than spring rainstorms.

Quantitative or Qualitative? There are 10 fuzzy puppies.

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