Question

In an experiment, Joey and Elena are trying to determine whether Super Grow fertilizer works better than Mo' Grow fertilizer on pepper plants. They buy 10 pepper plants that are the same size and water them the same amount three times per week. They use Super Grow on half of the plants and Mo'Grow on the other half. All of the plants receive the same amount of sunlight. Joey and Elena measure the height of the plants at the beginning of the experiment and every 6 days for one month (30 days).
 Which of the factors in the experiment are controlled variables?

Answer 1

Answer:

The sun and the water.

Explanation:

In this experiment in which Joey and Elena want to determine which is the best fertilizer to use on pepper plants the independent or controlled variables are the amount of sunlight and the amount of water the plants receive. Identical plants are treated in the same way except for Super Grow fertilizer and Mo' Grow fertilizer. The fertilizers are the independent variable that may or may not show different results on the height of the plants.