Question

the passage below describes an experiment. clayton wanted to grow cucumbers from seeds. he read that using a heating pad to heat up potting soil could help make seeds germinate, or sprout, faster. clayton wondered whether the temperature of the heating pad would affect how quickly the seeds germinated. he prepared two potting trays, each made up of ten small pots of soil, then planted one cucumber seed in each small pot and arranged the potting trays near a sunny window. he set an electric heating pad to 75°f and placed it under one potting tray. he set a second heating pad to 85°f and placed it under the other potting tray. clayton observed the pots daily and counted the number of days it took for a seed to germinate in each pot. identify the independent variable and dependent variable in this experiment. the temperature of the heating pad the number of days until a seed germinated independent variable dependent variable

Explanation:

An independent variable is what is changed in an experiment. Here, Clayton changes the temperature of the heating pad. A dependent variable is what is measured and is affected by the independent variable. The number of days until a seed germinates is what Clayton measures and it may be affected by the heating - pad temperature.

Answer:

Independent variable: the temperature of the heating pad
Dependent variable: the number of days until a seed germinated