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Answer Key
Grade 7 Science: Water Resources & Watershed Systems
1.
an area of land where all water drains to a common outlet
2.
water that flows over land into streams, lakes, or drains
3.
underground layer that can store and transmit groundwater
4.
how suitable water is for uses like drinking, wildlife, or recreation
5.
Answers vary: clarity, temperature, pH, dissolved oxygen, nutrients
6.
extra nutrients can cause algal blooms and harm water quality
7.
water stored underground in soil and rock spaces
8.
water on Earth's surface such as rivers, lakes, and wetlands
9.
land area draining to a common outlet
10.
water flowing over land into waterways
11.
underground layer storing/transmitting groundwater
12.
how suitable water is for intended uses
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