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WorksheetsEcosystems Pre-Assessment
Total questions: 14
Worksheet time: 28mins
Name
Class
Date
1.
In an ecosystem, birds depend on insects to survive. If someone spreads pesticide to control the insect population, which of the following is most likely to happen?
a)
The bird population will increase.
b)
The bird population will decrease.
c)
The bird population will decrease, then increase.
d)
The bird population will decrease, then increase.
2.
Why do trees like maple and spruce grow in a temperate rainforest community?
a)
The trees grow well in the dry, hot climate.
b)
The trees grow well in the wet, hot climate.
c)
The trees grow well in the dry, cool climate.
d)
The trees grow well in the wet, cool climate.
3.
Which biome is home to more species than any other biome?
a)
taiga
b)
grassland
c)
deciduous forest
d)
tropical rainforest
4.
Which adaptation best helps elk survive in the taiga biome?
a)
thick fur
b)
large antlers
c)
change of color
d)
winter hibernation
5.
Which of the following is the source of much of the oxygen in the atmosphere?
a)
plants
b)
volcanoes
c)
trucks and cars
d)
plankton in the oceans
6.
Corals have a symbiotic relationship with plant-like algae that grow inside them. How do the algae benefit the corals?
a)
The algae provide the corals with various nutrients.
b)
The algae help the corals make a hard outside coating.
c)
The algae allow the corals to live in deep ocean environments.
d)
The algae release a toxin that keeps predators away from the corals.
7.
A plant in the desert would most likely have which root system?
a)
a small taproot with long root hairs
b)
a small taproot with short root hairs
c)
a large root system, close to the surface
d)
a large root system, deep beneath the surface
8.
Different kinds of plants living in the same area must compete for water. Which kind of plant has the greatest chance of survival?
a)
the plant with the largest leaves
b)
a plant with a compact root system
c)
the plant with the largest root system
d)
a plant with needles instead of leaves
9.
Creatures that live in the deep ocean need to adapt to which environmental factor?
a)
lack of food
b)
high pressure
c)
low levels of salt
d)
high temperatures
10.
Both organisms need each other to survive in which of the following examples?
a)
a fungus and bacteria forming a lichen
b)
a parasitic worm living in a fox’s bloodstream
c)
a microorganism living in the stomach of a wolf
d)
a squirrel scaring insects off a tree into the path of birds
11.
How do carnivores obtain energy?
a)
They eat plants.
b)
They eat animals.
c)
They eat animals and plants.
d)
They eat the food they make.
12.
What role do decomposers play in ecosystems?
a)
They break down nitrogen and oxygen.
b)
They break down waste and dead matter.
c)
They provide nutrients for carnivores to make energy.
d)
They provide nutrients for omnivores to make energy.
13.
When decomposers break down the remains of dead organisms, what do they make that can be used by plants?
a)
starch
b)
cellulose
c)
nitrogen compounds
d)
hydrogen compounds
14.
Look at the energy pyramid. Where is the greatest amount of energy?
a)
A
b)
B
c)
C
d)
D
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