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WorksheetsInteractions Unit
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
Green plants are
a)
producers
b)
consumers
c)
herbivores
d)
omnivores
2.
What is the original source of almost all energy in most ecosystems?
a)
carbohydrates
b)
sunlight
c)
water
d)
carbon
3.
An organism that produces its own food supply from inorganic compounds is called a(an)
a)
heterotroph
b)
consumer
c)
detritivore
d)
autotroph
4.
symbiotic relationship in which both organisms benefit
a)
competition
b)
Mutualism
c)
nitrogen fixation
d)
energy pyramid
5.
A living relationship between two species in which one organism is harmed is called...
a)
mutualism
b)
commensalism
c)
parasitism
d)
niche
6.
A collection of organisms that belong to different populations but all live in the same area and interact with one another.
a)
Population
b)
Ecosystem
c)
Community
d)
Ecosphere
7.
Identify the symbiotic image and definition.
a)
mutualism
b)
commensalism
c)
parasitism
d)
predation
8.
Identify the symbiotic image and definition.
a)
mutualism
b)
commensalism
c)
parasitism
d)
predation
9.
Identify the symbiotic image and definition.
a)
mutualism
b)
commensalism
c)
parasitism
d)
predation
10.
What is one of the most important processes that removes carbon from the atmosphere?
a)
photosynthesis
b)
cellular respiration
c)
erosin
d)
soil respiration
11.
Where do animals get nitrogen from?
a)
soil
b)
air
c)
water
d)
plants
12.
Matter on Earth is limited, so it must be used ____________________________.
a)
only once
b)
over and over again
c)
by only animals
d)
at night only
13.
What role do animals play in the carbon cycle?
a)
absorb carbon dioxide from the atmosphere
b)
give off carbon dioxide
c)
combustion
d)
decomposing matter
14.
What type of succession is shown going from figure A to figure B?
a)
primary succession
b)
eutrophication
c)
secondary succession
d)
intermediate
15.
When the birth rate is larger in any given period than the death rate the population will __________.
a)
increase
b)
decrease
c)
stay the same
16.
Something that controls the growth or size of a population is a
a)
carrying capacity
b)
limiting factor
c)
growth factor
d)
limiting agent
17.
The maximum number of organisms in a given population that an ecosystem can support
a)
Load Capacity
b)
Carrying Capacity
c)
Limiting Factor
d)
Keystone Species
18.
Which of the following is a density independent limiting factor?
a)
competition
b)
temperature
c)
crowding
d)
disease
19.
What is population density?
a)
The number of individuals in a population per unit area.
b)
A population.
c)
Limiting factors.
d)
The same as a limiting factor.
20.
What is a population?
a)
A habitat.
b)
A group of individuals of the same species that live in the same area.
c)
A predator.
d)
The prey.
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