Questions & Answers
Browse all 23 questions from the
Middle School Ecology Fundamentals study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which of the following is an example of an abiotic factor in an ecosystem?
-
A
A type of bird
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B
The amount of rainfall
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C
A species of grass
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D
A population of fish
2
What is the primary role of decomposers in an ecosystem?
-
A
To produce oxygen through photosynthesis
-
B
To break down dead organic matter
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C
To consume producers directly
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D
To compete for limited resources
3
A food chain shows the flow of energy from one organism to another. Which organism is typically at the bottom of a food chain?
-
A
A carnivore
-
B
An omnivore
-
C
A herbivore
-
D
A producer
4
What term describes all the different populations of organisms living and interacting in a particular area?
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A
Biome
-
B
Habitat
-
C
Community
-
D
Ecosystem
5
Which of these biomes is characterized by very cold temperatures, low precipitation, and permafrost?
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A
Tropical Rainforest
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B
Desert
-
C
Tundra
-
D
Grassland
6
What is the term for a place where an organism lives and finds food, water, and shelter?
-
A
Niche
-
B
Population
-
C
Habitat
-
D
Community
7
In a food web, what happens to the energy as it moves up to higher trophic levels?
-
A
It increases by 10%
-
B
It is completely lost
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C
It decreases significantly
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D
It remains the same
8
Photosynthesis, the process plants use to create their own food, requires which key component from the environment?
-
A
Oxygen
-
B
Carbon Dioxide
-
C
Nitrogen
-
D
Methane
9
Which of the following is an example of a biotic factor?
-
A
Temperature
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B
Soil pH
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C
A predator
-
D
Wind speed
10
What is the largest level of ecological organization that includes all the Earth's ecosystems?
-
A
Biome
-
B
Biosphere
-
C
Ecosystem
-
D
Community
11
Which biome is known for its hot, dry climate and sparse vegetation, often with animals that are nocturnal?
-
A
Savanna
-
B
Taiga
-
C
Desert
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D
Temperate Forest
12
What is the term for the role an organism plays in its environment, including its diet and interactions?
-
A
Habitat
-
B
Niche
-
C
Community
-
D
Population
13
A population of rabbits is eaten by foxes. In this relationship, the rabbits are the:
-
A
Predators
-
B
Producers
-
C
Prey
-
D
Decomposers
14
Which biome is characterized by a large amount of rainfall and a wide variety of plant and animal life?
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A
Tundra
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B
Temperate Deciduous Forest
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C
Tropical Rainforest
-
D
Chaparral
15
What is the name for all the living organisms in a particular area, plus the non-living physical components of that environment?
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A
Community
-
B
Population
-
C
Ecosystem
-
D
Biome
16
Which of the following represents a producer in an aquatic ecosystem?
-
A
A shark
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B
A seaweed
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C
A crab
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D
A fish
17
What process involves the movement of water from the Earth's surface into the atmosphere?
-
A
Condensation
-
B
Precipitation
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C
Evaporation
-
D
Transpiration
18
An organism that eats other organisms is called a:
-
A
Producer
-
B
Decomposer
-
C
Consumer
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D
Autotroph
19
Which biome is dominated by grasses and has moderate rainfall, supporting large grazing animals?
-
A
Taiga
-
B
Savanna
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C
Desert
-
D
Tundra
20
What is the primary source of energy for most ecosystems on Earth?
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A
Geothermal vents
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B
The Moon
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C
The Sun
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D
Fossil fuels
21
The interaction where one organism benefits and the other is harmed is called:
-
A
Mutualism
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B
Commensalism
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C
Predation
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D
Competition
22
Which factor is crucial for the survival of all known life forms on Earth?
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A
High levels of UV radiation
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B
Complete absence of water
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C
Presence of oxygen
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D
Extreme cold temperatures
23
What is a group of individuals of the same species living in the same area called?
-
A
Community
-
B
Ecosystem
-
C
Population
-
D
Biome
