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Savvas 7th Grade Ecosystems and Biomes Test
By Jennifer Potter
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Last updated over 2 years ago
29 questions
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Question 1
1.
An organism that can make its own food is called a
consumer
producer
decomposer
Question 2
2.
In which process do producers use carbon from carbon dioxide to produce other carbon-containing molecules?
the nitrogen cycle
the water cycle
photosynthesis
Question 3
3.
The nonliving parts of an ecosystem are called
organisms
biotic factors
abiotic factors
Question 4
4.
If you were to make a physical model of the carbon cycle, what shape would the model take on?
linear
linear with stops and start
circular
Question 5
5.
The number of different species in an area is referred to as its
niche diversity
habitat fragmentation
biodiversity
Question 6
6.
A group of land ecosystems with similar climates and organisms is called a(n)
climate
biome
energy pyramid
Question 7
7.
Ponds and rivers are two types of
marine ecosystems.
freshwater ecosystems.
estuary ecosystems.
Question 8
8.
The many overlapping food chains in an ecosystem make up a(n)
food web.
niche
energy pyramid.
Question 9
9.
Which biome is extremely cold and dry?
mountains
desert
tundra
Question 10
10.
If all members of a species disappear from Earth, the species is said to be
extinct
endangered
threatened
Question 11
11.
The mating of California condors in zoos is an example of
habitat preservation.
captive breeding.
biodiversity.
Question 12
12.
If a kestrel eats a mouse that eats grass, the kestrel is a
first-level consumer
second-level consumer
decomposer
Question 13
13.
A diagram that shows how much energy is available at each feeding level in an ecosystem is a(n)
food web
food chain
energy pyramid
Question 14
14.
Bacteria and fungi are known as _______ because they break down the remains of organisms.
Question 15
15.
The soil that is frozen all year, called permafrost, is found in a _______ biome.
Question 16
16.
Water vapor turns into droplets of liquid water in the process of_______
Question 17
17.
Certain bacteria change nitrogen gas into a usable form in a process called_______
Question 18
18.
Setting aside a marsh as a wildlife refuge is an example of the _______ approach to protecting biodiversity.
Question 19
19.
The part of an ecosystem where an organism lives and feeds is called the organism’s_______
Question 20
20.
The deciduous forest biome is typically populated by many grasses, along with a few shrubs and trees.
True
False
Question 21
21.
Organisms that capture the energy of sunlight to make food are called producers.
True
False
Question 22
22.
Second-level consumers may be either carnivores or omnivores.
True
False
Question 23
23.
Producers release the gas oxygen as a product of photosynthesis.
True
False
Question 24
24.
Oak, maple, and beech trees, which lose their leaves each year, are typically found in a boreal forest.
True
False
Question 25
25.
The arrow in a food chain represents the energy.
True
False
Question 26
26.
Describe two roles bacteria play in the nitrogen cycle.
Question 27
27.
Explain why decomposers are essential to life on Earth.
Question 28
28.
Explain the difference between a population and a community in an ecosystem.
Question 29
29.
Briefly describe the steps in the water cycle.