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WorksheetsUnit 1: Introduction to Ecosystems
Total questions: 20
Worksheet time: 20mins
What is the largest reservoir for water?
the ocean
rocks and minerals
the atmosphere
glaciers
A place where matter/nutrients are collected/stored.
A lake
A reservoir
A cloud
The atmosphere
Which group is not represented in the food web?
producers
primary consumers
secondary consumers
decomposers
What do the arrows in the food chain indicate about the flow of energy in an ecosystem?
Energy is continuously recycled by the organisms in an ecosystem.
Energy flows in one direction in an ecosystem, from producers to consumers.
More of the available energy in an ecosystem is given to large animals than to small animals.
Organisms at the end of the food chain receive more energy than those at the beginning.
How would the removal of earthworms from the food chain affect the other organisms?
The number of bass will increase.
The number of crayfish will decrease.
The crayfish will get their energy directly from the sun.
The number of bass and ospreys (bird) will increase.
The diagram shows part of an aquatic food web for a stable lake ecosystem in Connecticut. What is the source of energy for the algae?
waves
sunlight
bacteria
rotifers, water fleas and tadpoles
Suppose that a new predator of the rabbit migrated to this ecosystem. What is the most likely initial effect on the other organisms?
More competition among the mice for food
More competition among the hawks for food
Less competition among snakes for food
Less grass available for food
The diagram provided shows a marine food chain. In this food chain, the zooplankton are
primary producers.
primary consumers.
secondary consumers.
tertiary consumers.
A student examines the information in the table. The student concludes that Organism W should be placed at the base of the food web to represent the feeding relationships in the marine ecosystem. However, the student later learns that Organism W's cells do not contain chloroplasts. Based on the new information, which conclusion would be appropriate?
Another organism in the marine ecosystem is a producer.
Organism W is a secondary consumer in the marine ecosystem.
The role of Organism T in the marine ecosystem changes during its life.
This marine ecosystem does not have any producers.
Which of these organisms would most likely be found at the bottom of a biomass pyramid?
giant squids
sand sharks
sea cucumbers
green algae
Which of the following are all threats to coral reefs?
zooplankton and phytoplankton only
chemicals and phytoplankton
oil spills, chemicals, sewage
oil spills, sewage, phytoplankton
Which of the following are functions of wetlands?
absorb pollutants
provide habitat for many animals
control floods by acting as a sponge for excess water
all of the above
