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