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WorksheetsEcosystems Round 2
Total questions: 25
Worksheet time: 13mins
Name
Class
Date
1.
Large blooms of algae on the surface of a lake keep which abiotic factor from reaching the bottom?
a)
water
b)
salt
c)
light
d)
oxygen
2.
Mangrove trees are affected by several factors. Which is an abiotic factor contributing to the energy cycle of a mangrove ecosystem?
a)
bacteria
b)
climate
c)
fungi
d)
rocks
3.
Scientists have developed an allergy medication from a plant that is part of the rainforest food chain. What concern might develop when producing this medication from the plant?
a)
overproduction of the medication
b)
increase in allergies in rainforest wildlife
c)
lack of patients to test the new medication
d)
decrease in a food source to rainforest wildlife
4.
Which population would be most affected if there is a decrease in the population of aquatic insects?
a)
elk
b)
frog
c)
moose
d)
squirrel
5.
Which description relates to an abiotic ecosystem factor?
a)
Plants growing in the environment provide a source of shelter for other organisms
b)
New organisms in the environment rely on favorable weather conditions for survival
c)
Animals in the environment feed on algae and rich organic material found in the water bed
6.
Which would a drought most likely affect?
a)
all organisms in a particular ecosystem
b)
only the plants in a particular ecosytem
c)
only the animals in a particular ecosystem
7.
Which would most likely limit the growth of plants living in the desert?
a)
lack of water
b)
high temperatures
c)
high intensity of light
d)
lack of photosynthesis
8.
After a forest fire, plants come back in abundance. Which limiting factor to plant growth is removed?
a)
food
b)
shelter
c)
space
d)
water
9.
Warm water contains less dissolved oxygen than colder water. Which population will be most affected by a long period of hot, dry days?
a)
fish in ponds
b)
fish in oceans
c)
plants in lakes
d)
plants in streams
10.
Mice, rabbits, bobcats, and squirrels all live in a brush ecosystem. Which animal would have the most difficult time surviving if the population of the other three animals continued to decrease?
a)
mouse
b)
squirrel
c)
bobcat
d)
rabbit
11.
A woodland area where deer live is partially cleared to build homes for people. Which best describes how the deer population will change as a result of clearing the land to build homes?
a)
The deer population will increase.
b)
The deer population will decrease
c)
The deer population will remain the same.
12.
In ecosystems where people live, which of the following are most likely to cause an increase in diseases transmitted by water?
a)
floods
b)
blizzards
c)
hailstorms
d)
avalanches
13.
How will a thriving grassland ecosystem most likely be affected by a drought?
a)
Plant respiration will increase.
b)
Animals will be forced to migrate.
c)
Soil nutrients will be enriched
d)
Natural succession will cease.
14.
Which best describes biotic stress in an ecosystem?
a)
fungi damaging corn fields
b)
wildfires started by lightning burning a forest
c)
floods causing land degradation and soil erosion
d)
high salinity levels in local waters decreasing crop yield
15.
An aquarist takes half of the fish out of a tank, and the remaining fish grow larger and are healthier. Which factor was most likely affecting the fish?
a)
water
b)
space
c)
shelter
d)
food
16.
The white-tailed deer found in North Carolina are herbivores. What will most likely happen to the deer if there is a drought and most of the plant life dies?
a)
Deer population will not change
b)
Deer population will increase due to a lack of food
c)
Deer population will decrease due to a lack of food
17.
Which most likely describes the effect of removing shelter from an ecosystem while increasing a population?
a)
The population will decrease due to lack of space and food
b)
The population will increase due to lack of shelter and available food
c)
The population will increase, then decrease due to lack of biotic factors
18.
Which is an abiotic factor that would affect the growth of a population within an ecosystem?
a)
the availability of water
b)
the availability of producers
c)
the type of herbivores present
d)
the number of carnivores present
19.
Which are major abiotic factors that determine the types of plants that can grow in an ecosystem?
a)
birds and bees
b)
precipitation and bees
c)
precipitation and temperature
20.
Which best describes an abiotic limiting factor in a population?
a)
animals
b)
plants
c)
water
d)
food
21.
Habitat becomes a major factor in the extinction of a species when
a)
genetic diversity is not achieved
b)
competitive species are introduced
c)
changes in behavior start to develop.
d)
smaller populations fail to breed
22.
Which most likely contributes to the growth of more plants in shallow waters of the ocean?
a)
tides
b)
sunlight
c)
oil spills
d)
warm currents
23.
Some caterpillars need big wide leaves to wrap up in when undergoing metamorphosis. Which is the limiting factor when there is a shortage of this kind of leaf?
a)
food
b)
shelter
c)
space
d)
water
24.
Which does every organism in an ecosystem need for survival?
a)
animals
b)
plants
c)
water
d)
soil
25.
As populations grow, they tend to spread out into new territory. Which limiting factor is most likely to become an issue?
a)
food
b)
shelter
c)
space
d)
water
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