indicate the health of a water ecosystem

are areas of great biological diverstiy

An organism used to monitor the health of an ecosystem.

A measure of how acidic or how basic a liquid is

a chemical that includes nitrogen and oxygen, often used as a fertilizer

A fertilizer containing phosphorus compounds

Too many nutrients in a body of water frequently due to runoff from the land. It causes a dense growth of plant life and death of animal life from lack of oxygen. (It can cause algal bloom.)

A fertilizer containing phosphorus compounds

a chemical that includes nitrogen and oxygen, often used as a fertilizer

A measure of how clear water is

Too many nutrients in a body of water frequently due to runoff from the land. It causes a dense growth of plant life and death of animal life from lack of oxygen. (It can cause algal bloom.)

An organism used to monitor the health of an ecosystem.

amount of oxygen that is present in the water

A measure of how clear water is

A fertilizer containing phosphorus compounds

Temperature of the water impacts

what kind of organisms can live in rivers, creeks and lakes.

the amount of minerals dissolved in the water.

Which of the following are indicators of healthy water systems?

low temperatures, high dissolved oxygen, and neutral pH

high nitrates, high pH, and low temperatures

An algae bloom in a water system is most likely caused by

large amounts of nitrates in runoff

high oxygen levels in the water

Which best describes the relationship between temperature and dissolved oxygen in a lake?

As temperature increases, dissolved oxygen decreases.

As temperature increases, dissolved oxygen increases.

As temperature decreases, dissolved oxygen decreases.

A change in temperature has no effect on dissolved oxygen.

Which would be the most likely cause of large numbers of fish dying in a stream?

low dissolved oxygen concentration

Which factors can have the greatest effect on the health of a river system?

natural disasters and tidal change

Which does an increase in eutrophication indicate to scientists studying a body of water?

an increase in fertilizer runoff

a decrease in pollutants from farm runoff

an increase in the health of the body of water

an increase in oxygen levels in the body of water

Which aspect of fertilizer pollution would have the greatest negative impact on an aquatic ecosystem?

Algal blooms deplete the oxygen and block the sunlight from penetrating a body of water.

Nitrates poison the water that fish breathe through their gills.

Microorganisms in the water absorb all the oxygen, suffocating animals.

Aquatic animals increase, adding producers to the food chain and feeding fish.

Which would most affect the health of fish in a local pond?

The daily release of hot water into the pond from a local factory.

A storm temporarily stirring up water and sediments in the pond.

The occasional erosion of sediments into the pond from a nearby field.

A slight increase in the number of people who fish in the pond for food.

Why do biologists use indicator species?

to monitor water quality and biodiversity

to compare freshwater and ocean ecosystems

to count the number of organisms present

to analyze the dominant species

Which is the best example of a point source pollution?

oil spill from a boat on the Atlantic Ocean

pesticides sprayed into the air

smoke from multiple industries in a large city

Which best describes the relationship between temperature and dissolved oxygen in a lake?

As temperature increases, dissolved oxygen decreases.

As temperature increases, dissolved oxygen increases.

As temperature decreases, dissolved oxygen decreases.

A change in temperature has no effect on dissolved oxygen.

A scientist collected water quality data in a protected estuary over time. He/she measured a nitrate level of 6ppm, and a dissolved oxygen level of 2 mg/l. Which would the scientist mostly likely conclude about this site?

nitrate levels are high, oxygen levels are low

nitrate and oxygen levels are normal

nitrate levels are high, and oxygen levels are healthy

How are indicator species like a warning system for bodies of water?

Their illness or death indicates pollution in an aquatic ecosystem

Their illness or death indicates the body of water is becoming more populated.

They indicate when food sources are declining

The indicate when predators are reducing the numbers of species

ESS.8.3.1/8.3.2

Quiz

•

Science

•

8th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-LS2-4, MS-LS2-3, MS-LS2-1

+10

Standards-aligned

Kara Dawson

Used 39+ times

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ESS.8.3.1/8.3.2

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A healthy water system has _______ levels of dissolved oxygen.

As the temperature of water increases, the amount of dissolved oxygen _________

The scale for determining how acidic or basic water is.

The idea pH for water is

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Bioindicators

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