Question

experimental design quiz
highlight three (3) constants for this experiment.
pea plant clones are given different amounts of water for a three - week period. first pea plant receives 400 milliliters. second pea plant receives 200 milliliters. third pea plant receives 100 milliliters. fourth pea plant does not receive any extra water; the plant only receives natural ways of receiving water. the height of the pea plants is recorded daily.

Explanation:

In an experiment, constants are factors that remain unchanged. Here, the type of plant (pea plant clones), the duration of the experiment (three - week period), and the daily recording of height (method of data collection) are constants. The type of plant is the same for all, the time the experiment runs is fixed, and how often height is recorded doesn't change. Also, the fact that they are clones means genetic factors are constant, the three - week period is a fixed time, and daily height recording is a consistent method.

Answer:

1. The type of plant (pea plant clones).
2. The duration of the experiment (three - week period).
3. The frequency of height recording (daily).