Ruby has observed that plants in her garden vary in height. She wants to investigate whether a plant species (species A) grows faster than the other garden species (species B, C, and D). Select the statement that describes Ruby gathered enough evidence to support a scientific explanation concerning plant growth rates

Question

Note: consider reviewing how Ruby developed her conclusion on page 8 of this lesson to select the best answer

a. Ruby measures the heights of several species A, B, C, and D plants, each species for one week at a time for four consecutive weeks
b. Ruby measures the heights of several species A, B, C, and plants for a week under the same conditions and finds journal articles that describe the growth rates of each species
c. Ruby measures the heights of several species A, B, C, and D plants for one week under different conditions and finds a journal article that describes the growth rate of species A.
d. Ruby measures the height of a species A plant for a week and finds an anonymous gardening blog that describes the growth rate of species A.

Answer 1

The statement that best describes Ruby gathering enough evidence to support a scientific explanation concerning plant growth rates is:

b. Ruby measures the heights of several species A, B, C, and D plants for a week under the same conditions and finds journal articles that describe the growth rates of each species.

This statement is the strongest because it involves measuring multiple species under the same conditions, allowing for a fair comparison of growth rates, and it is supported by existing research in journal articles which adds credibility to her findings.