WONDER #2733: How Does a Wastewater Treatment Plant Work?

Question 1 of 3

In the U.S. alone, there are about ___________ wastewater treatment plants.

1. 1 million
2. 5,500
3. 160,000
4. 15,000

Question 2 of 3

Which of the following is NOT a step in the treatment of wastewater, according to this Wonder?

1. The water is aerated.
2. The water passes through screens that catch debris.
3. The water is tested by plant officials who drink it.
4. The water is disinfected.

Question 3 of 3

Materials like oil and soap that rise to the surface of the water are called _______.

1. bubbles
2. scum
3. additives
4. crumbs

Check your answers online at https://wonderopolis.org/index.php/wonder/How-Does-a-Wastewater-Treatment-Plant-Work.