1. which of the following supports the idea that aquaponics reduce the impact of human activities on the environment?
a) reuse of fish waste reduces the use of fertilizers.
b) aquaponics systems use a great deal of water.
c) the installation and maintenance of equipment requires an investment of money. d) only certain types of fish can be used in aquaponics.

2. the clean water act funded the creation of which of the following?
a) groundwater remediation plans
b) sewage treatment plants
c) superfund sites
d) aquatic water preserves

3. which the following courses should a student take in order to become a hydrologist? choose the three correct answers
a) statistics
b) geography
c) coding
d) physical science
e) philosophy
f) chemistry

4. what caused the change in water quality in flint, michigan?
a) the city was taken off the detroit water system to save money
b) city officials decided to stop fully treating the water to save money.
c) the flint river became contaminated which caused lead to get into the water.
d) city officials ignored the clean water act and allowed wastewater to be dumped into the river.

5. which of the following occurred because of flint's water crisis? select the three correct answers
a)the number of children with lead poisoning doubled.
b) dozens of people contacted a form of pneumonia known as legionnaires' disease.
c) general motors stopped using flint's water due to corrosion of their machinery
d) rates of cancer skyrocketed among adults in flint.
e) city and state officials immediately alerted residents of widespread danger.

6. which data hydrologists predict floods? select the two correct answers
a) dissolved oxygen
b) water temperature
c) nitrate levels
d) impermeable land area
e) snowpack

7. which of the following water filtration methods requires the use of a membrane or filter?
a) distillation
b) ultraviolet radiation
c) reverse osmosis
d) chlorination

8. what is graywater ?
a) all wastewater generated from household usage
b) household wastewater except for the wastewater from toilets
c) household wastewater that does not contain surfactants
d)wastewater generated from indoor household usage