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Ecosystems
Test Description: Science
Instructions: Answer all questions to get your test result.
1) An ecosystem is made up of biotic (living) and abiotic (nonliving) things. Which of the following describes the BIOTIC part of the ecosystem?
A
only the plants and animals that live in water
B
only the plants that grow in the soil
C
only the animals that breathe oxygen
D
all of the living things in the environment
2) The rainforests in South America support many ecosystems. These ecosystems are healthy. How does the diversity in the rainforests help determine the health of an ecosystem?
A
resources in the environment last longer when the diversity is low
B
when diversity is high, there are more resources available
C
areas with high diversity have increased competition among the residents
D
less diverse ecosystems have less competition among the residents
3) Temperature, water, soil, and air are abiotic factors in an environment. They are not the same everywhere. What role do abiotic factors such as these play in an ecosystem?
A
they prevent competition among populations
B
they determine which plants and animals can live there
C
they help control the effect humans might have on the ecosystem
D
they control the changes of the seasons
4) Invasive plants compete with native plants for resources. Which statement describes what is likely to happen to native plants that compete with fast growing invasive plants?
A
their numbers will stay the same
B
their numbers will increase greatly
C
their numbers will decrease
D
their numbers will increase slightly
5) Megan's class has decided to RESTORE an empty lot to the way it was before the town was built. Before they buy any plants or soils, what must they determine?
A
what natural predators were once nearby
B
the factors that caused the plants to die
C
the average annual rainfall
D
which native plants used to live in the area
6) Carrotwood is a fast growing landscape tree. This tree is found in many habitats including dunes, coastal areas, freshwater marshes, and riverbanks. It crowds out native plants and competes for light and other resources. Carrotwood is...
A
a native species
B
a natural species
C
a predatory species
D
an invasive species
7) After large numbers of people moved to an area, several species of animals and plants became extinct. Which event most likely led to the extinction of so many species in a short amount of time?
A
natural disasters
B
the change in the climate
C
habitat destruction
D
variations (changes) in the species
8) The average weather in an area over time...
A
diversity
B
competition
C
limiting
D
climate
9) The variety of species in an ecosystem
A
competiton
B
limiting
C
climate
D
diversity
10) Nonliving...
A
abiotic
B
biotic
C
competition
D
limiting
11) The struggle for resources in an ecosystem
A
camouflage
B
mimicry
C
decomposer
D
competition
12) A problem with overpopulation is that...
A
there is too much meat for herbivores
B
there are often not enough resources
C
there is too much grass for grazers
D
there are not enough decomposers to provide energy for producers
13) What is the PRIMARY purpose of the needle-like leaves on a cactus?
A
protect from predators
B
soil absorption
C
water absorption
D
photosynthesis
14) A structure on an organism can only have ONE function.
A
False
B
True
15) Which of the following does NOT depend on any other organism for energy?
A
decomposer
B
herbivore
C
producer
D
carnivore
16) Which of the following pairs is a correct match?
A
Function is the body part of the organism and structure is the job of the function
B
Structure is the species of the organism and function is the number in the population
C
Structure is the body part of the organism and function is the job of the structure
D
Structure is the name of the organism and function is the job of the structure
17) Which of the following is NOT a decomposer?
A
bacteria
B
leaves
C
mold
D
fungus
18) What is special about a decomposer?
A
They make their own food in a process called photosynthesis
B
They will only eat living things
C
They only eat meat
D
They break down dead things and return the nutrients to the soil
*select an answer for all questions
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