Question

the passage below describes an experiment. manuel wanted to grow cucumbers from seeds. he read that using a heating pad to heat up soil could help seeds germinate, or sprout, faster. manuel prepared three potting trays, each made up of ten small pots of soil. he planted one cucumber seed in each small pot. then, he placed one electric heating pad under each tray. he kept one of the heating pads turned off. he turned one of the heating pads up to 78°f and the other heating pad up to 88°f. manuel observed how long it took for the seed in each pot to germinate. complete the sentence. in this experiment the pots on a heating pad set to 88°f were part of _. a control group an experimental group

Explanation:

In an experiment, the control group is not exposed to the variable being tested, while the experimental group is. Here, the variable is the temperature of the heating - pad. The pots on the heating pad set to 88°F are exposed to a specific temperature condition being tested, so they are part of the experimental group.

Answer:

an experimental group