4/12/2021 EOG Review (water)
Presentation
•
Science
•
8th Grade
•
Hard
Standards-aligned
Evie Locklear
Used 4+ times
FREE Resource
5 Slides • 3 Questions
1
4/12/2021 EOG Review (water)
2
River basins- an area of LAND that drains water into the closes river
You live in the Lumber River Basin because our water flows to the Lumber River
3
Everyone lives in a watershed (the lowest point where water flows)
many watersheds make up a River basin
all water wants to flow back into the ocean
small streams/tributaries collect water and join with larger rivers
4
Multiple Choice
Which best describes a characteristic of a river basin?
they are a source of ground water
they are saltwater ecosystems
they flow down from aquifers
they drain into the ocean
5
water quality can be tested a number of ways
turbidity-cloudiness of water
temperature- is affected by turbidity
Dissolved oxygen- is affected by the temperature
pH levels change with dissolved oxygen
Bioindicators- living things that are sensitive to change (fish, frogs, insects..)
6
colder water hold more oxygen making it easier to sustain life.
7
Multiple Choice
One dry summer, a large number of fish suddenly died in a shallow river. Which is the best explanation for this fish kill?
the water became too warm to hold enough dissolved oxygen for the fish
Heavy rains washed soil into the river, making it too muddy for the fish
fertilizer caused too many algae to grow, and the fish died from overeating
the water became too cold, stressing the fish so that they became sick and died.
8
Multiple Choice
Which of these is most likely to have a harmful effect on water quality?
having water laws and regulations
using chemical indicators to check water quality
treating sewage to kill pathogens
letting pollutants wash out to sea
4/12/2021 EOG Review (water)
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