During a school project, Aria, James, and Olivia observed a high number of macroinvertebrates such as stoneflies, mayflies, and water boatmen in a local stream. This abundance of macroinvertebrates is an indication of:

During a science project, Scarlett observed a pond over several months. What could cause the water temperature in the pond to increase?

In a recent biology class, Daniel learned about an important element for fish and other aquatic animals to live. What is it?

Priya is conducting an experiment to determine the measure of the amount of dissolved salts in a given amount of liquid from the local sea. What is she measuring?

Lily is conducting a science project to determine how suitable water from different sources may be for drinking. What measure should she focus on?

In a study of a local river ecosystem, Aria, Arjun, and Grace are testing for indicators of healthy water systems. Which of the following results would indicate a healthy system?

What is the possible effect of high nitrate level in water systems near Abigail's farm?

Grace is testing the water quality of a local lake. She mentions the term 'pH' during her analysis. What is she referring to?

In a school project, Priya, Evelyn, and Anika are tasked with creating a presentation on environmental conservation. Their main theme is:

The Clean Water Act is a _______________ law in the United States that regulates water pollution.

During a community service project, Kai and Evelyn learned that the Clean Water Act regulates pollution of _________________ .