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LS10 And LS11 (ecosystems)
Test Description: Dynamics in the ecosystem and human interaction
Instructions: Answer all questions to get your test result.
1) Which of the following is NOT a negative impact from clearing away plants from a large plot of land?
A
There will be a decrease in natural resources for animals to utilize.
B
Fewer trees for animal habitats
C
Birds find seeds and insects on cleared and plowed land
D
Fertilizers containing nitrogen run-off to the surrounding ecosystems
2) When topsoil is carried away, plant growth suffers for wildlife and farming. What carries away topsoil?
A
erosion
B
fertilizer
C
pollution
D
poaching
3) Which of the following is the greatest threat to biological diversity today?
A
diversity of animals
B
deforestation
C
methane poisoning
D
use of plant fertilizers
4) Pollution threatens the success of organisms by increasing the _____.
A
availability of fresh water only
B
competition for limiting factors such as food and shelter
C
diversity in an area
D
number of species
5) Deforestation results in an increase of greenhouse gases because less trees means less _____.
A
carbon dioxide is released into the atmosphere
B
oxygen is removed from the atmosphere
C
glucose is released into the atmosphere
D
carbon dioxide is removed from the atmosphere
6) The preservation and careful management of the environment and natural resources
A
poaching
B
pesticides
C
greenhouse gases
D
conservation
7) When plants stop metabolism and growth for a period of time
A
hibernation
B
drought
C
phototropism
D
dormancy
8) When plants grow or bend towards sunlight
A
phototropism
B
hibernation
C
dormancy
D
drought
9) In order for an animal to survive while in hibernation, its body’s metabolic rate _____.
A
decreases
B
stays the same
C
increases
D
doubles
10) Which would NOT influence population size?
A
introducing a new species to an ecosystem
B
hibernation
C
migration
D
droughts and floods
11) _____ prevent populations from increasing in size.
A
limiting factors
B
cellular respiration
C
biotic factors
D
population densities
12) Beavers do not migrate and can adapt to changing climates. Which of the following would threaten the survival of beavers?
A
forest fire in October
B
hot temperatures in July
C
snow in January
D
freezing rain in December
13) A pond that suddenly has an increased growth in algae probably was polluted by
A
an increase in chromosomes
B
people over-fertilizing their lawns nearby
C
people dumping waste oil in the pond
D
a diseased animal
14) Gases that trap heat in the Earth's atmosphere
A
Oxygen
B
Greenhouse gases
C
Nitrogen
D
Smoke
*select an answer for all questions
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