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WorksheetsEcology Unit
Total questions: 19
Worksheet time: 18mins
1. Ecology is the science that studies:
the interaction of living things with each other and their surroundings
the anatomy of living things
the environment in which humans live
matter and the changes that it undergoes
a and b are correct
A step-by-step sequence with only one path showing the relationship between organisms that feed on each other starting with a food source such as plants is called:
food web
biomass pyramid
food chain
a and c are correct
Which of the following would be considered a BIOTIC factor in an ecosystem?
bacteria
rain
rocks
wind
Organisms which are able to make their own food are called:
herbivores
carnivores
omnivores
producers
If all bacteria on the earth were eliminated, why would all other living things die off?
bacteria are responsible for returning oxygen to the atmosphere
bacteria are important producers
bacteria decompose dead organisms which recycles nutrients
bacteria are at the beginning of every food chain
1. What effect would a lack of sunlight have on the carbon dioxide (x) and oxygen (y) levels in an ecosystem
Decrease x and y
Increase x and y
Decrease x and increase y
Increase x and decrease y
There will be no effect on the level of these gases
1. The third trophic level is occupied by
Secondary consumers
Primary consumers
Producers
Tertiary consumers
1. A group of organisms of different species that live and interact together is referred to as a(n)no
community
ecosystem
population
biome
none of the above
1. The role that an organism plays in the ecosystem is called a
trophic level
niche
producer
consumer
1. The amount of energy that is passed on at each link in the food chain is about
10%
30%
50%
75%
90%
1. An abiotic factor found in a pond would be a(n):none of the above
snail
sand
algae
seaweed
1. In the nitrogen cycle, which form of nitrogen is used by plants?
N2
N
nitrates
ammonia gas
1. The Biosphere:
Is all the water on, above and below Earth’s surface
Is the rocky outer shell of Earth.
Describes all the locations in which life can exist.
Acts like a blanket providing us with moderate temperatures, protecting us from solar radiation, and ultraviolet light.
1. Populations:
Are all of the individuals of a single species in a particular area
Are made of both living and non-living components
Are individuals from all of the populations
Are all the biotic factors within a particular area
1. Animals breathe out ______________ and breath in _____________.
O2, CO2.
CO2, O2.
N2, O2
CO2, N2
The most important dissolved nutrients for healthy soil are
CO2, N2, O2,
herbs, ammonia, salt
nitrogen, phosphorus, and potassium
Natural fertilizers
Plant and Animal Wastes
Man-Made Chemicals
Synthetic fertilizers
Man-Made Chemicals
Plant and Animal Wastes
What is an invasive species?
Native species which are in an area.
Non-Native species which are added to an area.
