Question

the passage below describes a process of scientific inquiry. select the part of the passage that describes testing the hypothesis. olivia tends to a community herb garden. she heard from a colleague that plants need nitrogen to grow. she wondered if adding a nitrogen - based fertilizer to the soil would increase the growth rate of her herbs. olivia added a nitrogen - based fertilizer to the soil of half the herbs and left the other half unchanged. after one month, she measured the height of all of the herbs. she found that the herbs without fertilizer grew to an average height of 6 inches, while the herbs with fertilizer grew to an average height of 10 inches. olivia concluded that nitrogen - based fertilizer increases the rate at which herbs grow. olivia shared her findings with her colleagues at the community garden.

Explanation:

Testing a hypothesis involves an experiment. Olivia's experiment was adding nitrogen - based fertilizer to half the herbs and leaving the other half without it, then measuring their growth after a month.

Answer:

Olivia added a nitrogen - based fertilizer to the soil of half the herbs and left the other half unchanged. After one month, she measured the height of all of the herbs.