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WorksheetsCh. 3 & 4 Review
Total questions: 40
Worksheet time: 20mins
The prefix bio- means?
life, living
house
before, ahead of time
Food chains show how living organisms obtain their food, while food webs show how multiple food chains are interrelated.
Matter and energy are conserved as they pass through a food web.
Ninety percent of the energy that is available at one trophic level is transferred to the next level.
Ninety percent of the matter that is available at one trophic level is transferred to the next level.
Matter and energy are not conserved as they pass through a food web.
Is it possible for the top level to be wider than the level before it?
Yes, if climatic conditions are right, there can be more predators than prey.
No, it is not possible for a large population of coyotes to exist because of their mating habits.
Yes, if the population of coyotes swells, the top level will be larger than the level before it.
No, it is not possible for an ecosystem to support more predators than prey.
What does the energy pyramid demonstrate?
A great amount of energy is gained moving up the energy pyramid.
A great amount of energy is lost traveling up the energy pyramid.
Energy is not transferred between organisms in an ecosystem.
The same amount of energy is available at every level of the energy pyramid.
Which type or organism is part of the the food web, but is not included here? (grass-->grasshopper-->frog-->snake)
secondary consumers
primary consumers
producers
decomposers
Which is the primary consumer?
coyotes
snakes & hawks
mice, gophers, and birds
grasses, tree leaves, flowers, and vines
Which is the primary producer?
coyotes
snakes & hawks
mice, gophers, and birds
grasses, tree leaves, flowers, and vines
Which is the tertiary consumer?
coyotes
snakes & hawks
mice, gophers, and birds
grasses, tree leaves, flowers, and vines
Which is the secondary consumer?
coyotes
snakes & hawks
mice, gophers, and birds
grasses, tree leaves, flowers, and vines
How is each trophic level of the biomass pyramid related to the adjacent trophic levels?
Each trophic level contains ten times as much biomass as the level below it and one-tenth as much biomass as the level above it.
As the trophic levels progress from phytoplankton to sharks, there is an increase in both the number of individual organisms and the biomass.
Each trophic level contains one-tenth as much biomass as the level below it and ten times as much biomass as the level above it.
As the trophic levels progress from phytoplankton to sharks, there is a decrease in the amount of biomass but an increase in the amount of available energy.
What role do decomposers play in an ecosystem?
Decomposers only break down and recycle matter from the producers shown in the food chain.
Decomposers only break down and recycle matter from the consumers shown in the food chain.
Decomposers break down and recycle matter from each organism shown in the food chain.
Decomposers are not needed to break down or recycle matter in this aquatic ecosystem.
If 4,000 units of energy are available in the producer level, how much would be available to the secondary consumers?
4 units
40 units
400 units
Which of the following best explains why the number of organisms at each level decreases while moving up the energy pyramid?
The animals at each level have more predators, so they produce more offspring.
The animals at higher levels move more than animals at lower levels, so they require more energy.
The animals at each level use energy, so only a small amount of their energy is available to the next level.
The animals at higher levels are more competitive, so fewer animals survive.
If the normal pH of a pond is 6.5, what happens is the pH falls to 5.5 due to acid rain?
The species that have a normal pH of below 5.5 will die.
The species that have a normal pH of above 5.5 will die.
Nothing will happen.
All organisms will die.
Why is the first level of an energy pyramid the widest block?
This block represents ten times the number of organisms of the next block.
This block represents the most complex organisms in the pyramid.
This block represents the trophic level with the most stored energy.
This block represents all the producers and herbivores in the ecosystem.
Primary producers are organisms that
rely on other organisms for their energy and food supply.
consume plant and animal remains and other dead matter.
use energy they take in from the environment to convert inorganic molecules into complex molecules.
obtain energy by only eating plants.
an earthworm that eats the decaying remains of plants and animals
herbivore
omnivore
carnivore
decomposer
a bear that feeds on plants and animals
herbivore
omnivore
carnivore
decomposer
a cow that feeds only on plants
herbivore
omnivore
carnivore
decomposer
a snail that feeds on plants, algae, and fungi
herbivore
omnivore
carnivore
decomposer
an owl that feeds only on animals
herbivore
omnivore
carnivore
decomposer
a human that feeds on plants and animals
herbivore
omnivore
carnivore
decomposer
The series of steps in which a large fish eats a small fish that has eaten algae is a
food web
food chain
pyramid of numbers
pyramid of biomass
Each of the following is an abiotic factor in the environment except
temperature
soil
sunlight
these are all abiotic factors
A plant takes in solar energy to create food. A grasshopper then eats the plant. The grasshopper is then eaten by a frog. Based on its behavior, which ecological terms describe the frog?
herbivore, producer
carnivore, producer
carnivore, consumer
herbivore, consumer
Another name for consumer that means to consume other organisms
autotroph
heterotroph
producer
prey
Which of these is an biotic factor that could affect an ecosystem?
introduction of a new species in the area
an increase in prey in an ecosystem
a decrease in producers within an area
these are all abiotic factors
Living things that capture energy from sunlight or chemicals and convert it into usable energy for cells are called __________________.
heterotrophs
autotrophs
monotrophs
terratrophs
A grasshopper feeds on a leaf. The grasshopper is a(n)...
tertiary consumer
heterotroph
autotroph
primary consumer
On average, about _______________ of the energy available within one trophic level is transferred to the next level. The rest is lost as waste heat.
10%
20%
30%
40%
What would most likely happen if an ecosystem no longer receives sunlight?
The number of herbivores would increase
The number of plants would increase
The number of carnivores would increase
All living organisms would eventually die
All food chains _________________________
are a part of an ecosyste
begin with a producer
have less consumers than producers
these are all true
All of the populations that live in one area together
limiting factors
populations
community
speed limit
