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Ecosystems
Test Description: Questions cover goal one on ecosystems.
Instructions: Answer all questions to get your test result.
1) A television program has a show that includes lizards, cacti, and snakes. Which could most likely be a title for the show?
A
Life in the American Desert
B
Nebraska’s Endless Prairie
C
Alaska's Great Tundra
D
The Deciduous Forests of North Carolina
2) Soil content is very different in various ecosystems on earth. What can soil content help determine?
A
how much precipitation will fall in a specific area
B
which plants and animals live in a specific area
C
the average temperature in a specific area
D
the amount of pollution in a specific area
3) Which best explains how the sun’s energy is passed through an ecosystem?
A
through the food chain
B
through decomposition
C
through the water cycle
D
through several producers
4) Which best explains how toxic chemicals in the soil can harm humans?
A
They cause the soil to become too warm for food to grow.
B
They are absorbed by animals that provide human food.
C
They evaporate into the air, causing air pollution.
D
They are absorbed by plants that provide human food.
5) Salt marshes are composed of water and soil that contain high levels of salt compared to other ecosystems. Which is the main reason organisms are able to survive in salt marshes?
A
The organisms have adapted to the level of salt in the water and soil.
B
The organisms eat special plankton that reduces the effects of the salt.
C
The organisms can live there only with the help of humans who add chemicals to the salty water and s
D
The organisms depend on the salt for nutrients and survival.
6) Which animal relationship is parasitic?
A
a tick feeding on a dog
B
a zebra running from a lion
C
a deer grazing in a field
D
a bear eating a fish
7) Which is the primary cause for habitat reduction?
A
development of wilderness areas
B
development of landfills
C
development of ponds
D
development of cities and neighborhoods
8) Which best explains how nonpoint source pollution occurs?
A
Water runs over the land picking up pollutants and adds them to bodies of water.
B
Too much carbon dioxide is added to the air.
C
Moisture in the air is overheated and harms the environment when it falls as precipitation.
D
Factories empty waste directly into bodies of water.
9) Which effect can fertilizer from a farm have on a nearby river?
A
It may cause an increase in algae in the river.
B
It may cause an increase in water quality in the river.
C
It may cause a decrease in plant growth in the river.
D
It may cause a decrease in the number of rocks in the river.
10) How does nitrogen enter a land food chain?
A
It is released by decomposers when breaking down dead plants and animals.
B
It is introduced by first-level consumers to second-level consumers.
C
It is created by the sun and absorbed by producers.
D
It is absorbed from the soil by producers which are then eaten by consumers.
*select an answer for all questions
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