Name: 
 

Grade 7 Unit 1 Study Guide



Modified True/False
Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true.
 

 1. 

A species is a group of organisms that can successfully mate with each other and reproduce.
_____________________________________________________________________

 

 2. 

An ecologist studies only the biotic parts of an ecosystem.
_____________________________________________________________________

 

 3. 

The soil under a rock could be described as an earthworm’s niche.
_____________________________________________________________________

 

 4. 

Frogs, snails, geese, and sticklebacks could be found in an ocean ecosystem in Newfoundland and Labrador.
_____________________________________________________________________

 

 5. 

When we study and ecosystem, we study only the biotic parts of the ecosystem.
_____________________________________________________________________

 

 6. 

Many individuals of the same species living together are called a community.
_____________________________________________________________________

 

 7. 

An ecological niche is the set of jobs or roles that an individual fills in an environment.
_____________________________________________________________________

 

 8. 

Mushrooms and micro-organisms are neither plants nor animals; they can be described as abiotic factors.
_____________________________________________________________________

 

 9. 

Air, water, and rocks are essential to life, and can be described as biotic factors.
_____________________________________________________________________

 

 10. 

Shrews eat insects and earthworms.  The shrew is an example of a herbivore.
_____________________________________________________________________

 

 11. 

Spiders eat insects that eat plants.  A spider is an example of a parasite.
_____________________________________________________________________

 

 12. 

You see a raven eating a road-killed squirrel. That raven is behaving as a carnivore.
_____________________________________________________________________

 

 13. 

A food web is a model that shows how energy is lost at each link in the food chain.
_____________________________________________________________________

 

 14. 

In a parasitic relationship, the organism that provides food for the other organism is the parasite.
_____________________________________________________________________

 

 15. 

An introduced species is a new species that is brought on purpose into an ecosystem.
_____________________________________________________________________

 

 16. 

Coyotes are native to the island of Newfoundland.
_____________________________________________________________________

 

 17. 

Wild raspberry plants are among the first plants to establish themselves on bare soil after trees have been removed.  This is an example of primary succession.
_____________________________________________________________________

 

 18. 

The process by which a biological community changes over time is called flooding.
_____________________________________________________________________

 

 19. 

Species that can establish themselves in areas with little or no soil and few nutrients are called climax species.
_____________________________________________________________________

 

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 20. 

What does an ecosystem consist of?
a.
the abiotic and biotic parts of an environment
b.
the animals and biotic parts of an environment
c.
the animals and plants that live in an environment
d.
the plants and abiotic parts of an environment
 

 21. 

Which of the following best describes an organism’s habitat?
a.
an organism’s interaction with the abiotic parts of the ecosystem
b.
an organism’s interaction with the biotic parts of the ecosystem
c.
the place where an organism lives
d.
the role that an organism plays in an ecosystem
 

 22. 

Which of the following are necessary for the survival of a squirrel?
a.
food, water, and a community
b.
food, water, and a safe shelter
c.
safe shelter and a habitat
d.
safe shelter and a population
 

 23. 

In which ecosystem would you most likely find seals?
a.
forest
b.
freshwater
c.
ocean
d.
river
 

 24. 

Which animals are common to forest ecosystems in Newfoundland and Labrador?
a.
moose, caribou, black bear
b.
moose, lynx, and raccoons
c.
raccoons, moose, and deer
d.
red fox, lynx, and deer
 

 25. 

Which of the following terms means “harmful substances released by humans into the environment”?
a.
decomposers
b.
fossil fuels
c.
introduced species
d.
pollutants
 

 26. 

Which of these is a pioneer species?
a.
beetle
b.
birch
c.
lichen
d.
maple
 

 27. 

Which of these is a climax species?
a.
bacteria
b.
lichens
c.
mosses
d.
spruce
 

 28. 

Which groups of animals live in the Newfoundland and Labrador forest ecosystem?
a.
Moose, lynx, black bear
c.
Moose, raccoon, white-tailed deer
b.
Moose, caribou, raccoon
d.
Red fox, lynx, grizzly bear
 

 29. 

Which defines Mutualism?
a.
Interactions where both organisms benefit
b.
Interactions where one organism benefits and the other is harmed
c.
Interactions where one organism benefits and the other is unaffected.
d.
Interactions where neither organism benefits.
 

 30. 

Which is the best example of commensalism?
a.
Barnacle on a whale
c.
Tick on a Deer
b.
Brain worm in a caribou
d.
A parasitic tapeworm
 

 31. 

Phytoplankton is a microscopic plant that lives in freshwater.  What role does phytoplankton fill in the ecosystem?
a.
Consumer
c.
Omnivore
b.
Herbivore
d.
Producer
 

 32. 

Which process allows plants to make their own food?
a.
Cellular respiration
c.
Growth
b.
Chemical synthesis
d.
Photosynthesis
 

 33. 

Which is an example of a pioneer species?
a.
Beetle
c.
Lichen
b.
Birch
d.
Maple
 

 34. 

A compost heap will get very hot as it works. What is the source of the energy?
a.
consumers release heat energy as they eat food in the heap
b.
decomposers convert some of the food energy to heat energy
c.
producers release heat energy as they grow in the heap
d.
scavengers produce a great deal of heat as they move around
 

 35. 

Which of these models best shows how different food chains interconnect?
a.
energy pyramid
b.
food chain
c.
food web
d.
nutrient cycle
 

 36. 

Which of these words best describes a mouse that eats wheat and nothing else?
a.
decomposer
b.
primary consumer
c.
producer
d.
secondary consumer
 

Matching
 
 
Match the term to the appropriate description. Each term may only be used once.
a.
climax community
g.
sustainable
b.
pioneer species
h.
natural resources
c.
primary succession
i.
environmental impact
d.
secondary succession
j.
climate change
e.
succession
k.
pollutants
f.
monoculture
l.
acid rain
 

 37. 

process by which biological communities change over time
 

 38. 

can establish themselves with little or no soil and few nutrients
 

 39. 

the regrowth of a community in an area that has changed dramatically after a disturbance
 

 40. 

precipitation that contains nitrogen and sulfur combined with water
 



 
Check Your Work     Start Over