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Ecosystem & Its Component ( Biotic & Abiotic Factors, Symbiotic

Total questions: 77

Worksheet time: 39mins

Name
Class
Date
1.

Decomposer organisms break down dead organisms, providing energy to carnivores

a)

true

b)

false

2.

What is composed of several food chains in an ecosystem that intersect and depend on one another?

a)

niche

b)

feeding level

c)

energy pyramid

d)

food web

3.

What is the ultimate source of energy in any food chain?

a)

the sun

b)

producers

c)

consumers

d)

decomposers

4.

Which organisms can be found at the first, or lowest, trophic level?

a)

herbivores

b)

carnivores

c)

heterotrophs

d)

autotrophs

5.

Herbivores eat only meat.

a)

true

b)

false

6.

Food flows along a food chain from consumers to producers to decomposers.

a)

true

b)

false

7.

Which statement describes an autotroph?

a)

It is an organism that makes its own food.

b)

It is an organism that eats other organisms.

c)

It is an organism that eats decaying matter.

d)

None of the above.

8.

Which situation is a biotic factor operating within an ecosystem?

a)

the kind of climate in a given region

b)

carnivores that eat other animals

c)

the concentration of hydrogen gas in the air

d)

the rate of water flow in a body of water

9.

Weather (such as rain) and soil conditions are considered to be part of the ____________ factors of an ecosystem.

a)

biotic

b)

antibiotic

c)

abiotic

d)

biomass

10.

All the nonliving things in an environment are called the ________ factors.

a)

abiotic

b)

biotic

c)

ecological

d)

inorganic

11.

A certain plant needs moisture, carbon dioxide, oxygen light, and minerals to survive. This scenario shows that a living organism depends on

a)

biotic factors

b)

abiotic factors

c)

symbiotic relationships

d)

carnivore-herbivore relationships

12.

All are considered to be abiotic factors EXCEPT

a)

moisture

b)

air currents

c)

predators

d)

temperature

13.

During a long period when there is no rainfall, a mountain lion may temporarily leave its usual hunting territory to drink from a farm pond. To what is this behavior probably due?

a)

its need to find different foods to eat

b)

the change in an abiotic factor in its environment

c)

its need to find a new habitat

d)

the change in a biotic factor in its environment

14.

What is an example of a biotic factor?

a)

water

b)

grass

c)

soil

15.

Which of these phrases describes the biotic factors of an ecosystem?

a)

the number of individual organisms in each trophic level of an ecosystem

b)

any living part of an environment

c)

an organism that eats only meat

16.
All the living things and nonliving things in a given area.
a)
Ecosystems
b)
Abiotic factors
c)
Biotic factors
d)
Predation
17.
The nonliving parts of an ecosystem
a)
Community
b)
Population
c)
Biotic factors
d)
Abiotic factors
18.
The living or once living things in an ecosystem
a)
Abiotic factors
b)
Ecosystems
c)
Biotic factors
d)
Populations
19.
The place within an ecosystem that provides food, water, shelter, and other biotic and abiotic factors an organism needs to survive and reproduce.
a)
Population
b)
Habitat
c)
Abiotic factors
d)
Biotic factors
20.
All the organisms of the same species that live in the same area at the same time.
a)
Population
b)
Abiotic factors
c)
Biotic factors
d)
Habitat
21.
All the populations living in the same area at the same time
a)
Populations
b)
Abiotic factors
c)
Biotic factors
d)
Community
22.
The way a species interacts with abiotic and biotic factors to obtain food, find shelter, and fulfill other needs
a)
Habitat
b)
Niche
c)
Competition
d)
Mutualism
23.
Describes the demand for resources, such as food, water, and shelter in short supply in a community
a)
Population
b)
Overpopulation
c)
Competition
d)
Symbiosis
24.
Occurs when a population becomes so large that it causes damage to the environment
a)
Competition
b)
Overpopulation
c)
Predation
d)
Mutualism
25.
The act of one organism, a predator, feeding on another organism, a prey
a)
Predation
b)
Mutualism
c)
Commensalism
d)
Competition
26.
A close, long term relationship between two species that usually involves an exchange of food or energy
a)
Competition
b)
Overpopulation
c)
Niche
d)
Symbiosis
27.
A symbiotic relationship where both species benefit
a)
Parasitism
b)
Mutualism
c)
Predation
d)
Commensalism
28.
A symbiotic relationship in which one organism benefits, but the other neither benefited nor harmed
a)
Commensalism
b)
Parasitism
c)
Mutualism
d)
Food chain
29.
A symbiotic relationship in which one organism benefits while the other is harmed
a)
Mutualism
b)
Commensalism
c)
Parasitism
d)
Food chain
30.
Organisms that cannot make their own food
a)
Food chain
b)
Parasites
c)
Producers
d)
Consumers
31.
Organisms that use outside energy sources, such as the Sun, and produce their own food
a)
Food chain
b)
Parasites
c)
Producers
d)
Consumers
32.
A consumer that eats only plants and other producers
a)
Herbivores
b)
Carnivores
c)
Omnivores
d)
Decomposers
33.
A consumer that eats herbivores and other consumers
a)
Herbivores
b)
Carnivores
c)
Omnivores
34.
Eat producers and consumers
a)
Omnivores
b)
Carnivores
c)
Herbivores
d)
Decomposers
35.
Breaks down dead organisms
a)
Omnivores
b)
Decomposers
c)
Carnivores
d)
Herbivores
36.
A model that shows how energy flows in an ecosystem through feeding relationships
a)
Commensalism
b)
Parasitism
c)
Food web
d)
Food chain
37.
A model of energy transfer that can show how the food chains in a community are interconnected
a)
Commensalism
b)
Parasitism
c)
Food web
d)
Food chain
38.

Is wind a biotic or abiotic factor?

a)

biotic

b)

abiotic

39.

Is soil a biotic or abiotic factor?

a)

biotic

b)

abiotic

40.

Are rocks biotic or abiotic factors?

a)

biotic

b)

abiotic

41.

Is water a biotic or abiotic factor?

a)

biotic

b)

abiotic

42.

Is temperature a biotic or abiotic factor?

a)

biotic

b)

abiotic

43.

Is pH a biotic or abiotic factor?

a)

biotic

b)

abiotic

44.

Is precipitation a biotic or abiotic factor?

a)

biotic

b)

abiotic

45.

Is symbiosis a biotic or abiotic factor?

a)

biotic

b)

abiotic

46.

Is competition within a species a biotic or abiotic factor?

a)

biotic

b)

abiotic

47.

Is predation a biotic or abiotic factor?

a)

biotic

b)

abiotic

48.

Is disease a biotic or abiotic factor?

a)

biotic

b)

abiotic

49.

Are producers biotic or abiotic factors?

a)

biotic

b)

abiotic

50.

Are consumers biotic or abiotic factors?

a)

biotic

b)

abiotic

51.

Are decomposers biotic or abiotic factors?

a)

biotic

b)

abiotic

52.

Is sunlight a biotic or abiotic factor?

a)

biotic

b)

abiotic

53.

Abiotic factors are ___________.

a)

non-living parts of an ecosystem

b)

living parts of an ecosystem

c)

things that once were alive, but now are dead

d)

not important parts of ecosystems.

54.

Biotic factors are ___________.

a)

non-living parts of an ecosystem

b)

living parts of an ecosystem

c)

things that once were alive, but now are dead

d)

not important parts of ecosystems.

55.

An ecosystem is made up of __________.

a)

living things only

b)

non-living things only

c)

both living and non-living things

56.

T/F: Abiotic factors are an unimportant part of ecosystems.

a)

true

b)

false

57.

What does the word root 'bio-' mean?

a)

living

b)

dead

c)

science

d)

study

58.

Temperature, light, air, water, and soil are all _____ parts of the environment

a)

abiotic

b)

biotic

c)

living

d)

alive

59.

What is an example of a biotic factor?

a)

Skunk

b)

soil

c)

rocks

d)

water

60.

What does biodiversity mean?

a)

Nitrogen fixation

b)

Only one species in an area.

c)

All abiotic life

d)

The different amount of species in an area

61.

A population is...

a)

Multiple species that live in one area

b)

All of the living and nonliving things in an area

c)

A group of one species in one area

d)

None of these

62.

A system made up of organisms interacting with one another

a)

biology

b)

abiotic

c)

ecosystem

d)

biotic

63.

Organisms that make up the living part of an ecosystem.

a)

abiotic factors

b)

biotic factors

c)

ecosystem

d)

ecology

64.

Non-living things found in an ecosystem.

a)

biotic

b)

abiotic

c)

ecology

d)

dead

65.

____________ is the study of the relationships between living organisms, including humans, and their physical environment; it seeks to understand the vital connections between plants and animals and the world around them.

a)

Biology

b)

Ecology

c)

Ecosystem

d)

Habitat

66.

All of the populations that live in one area together

a)

home

b)

town

c)

population

d)

community

67.

A species that is in danger of becoming extinct.

a)

not very lucky

b)

threatened species

c)

endangered species

d)

out of time

68.

Which is a biotic factor?

a)

sunlight

b)

air

c)

bacteria

d)

salinity

69.

Deserts, mountains, and rivers are all examples of ________.

a)

holiday destinations

b)

ecosystems

c)

habitats

d)

all of the above

70.

Ecosystems are always______.

a)

never different

b)

always balanced

c)

always the same

d)

always changing

71.

Which statement is correct?

a)

A population is the same as a community

b)

A community is a part of a population

c)

A population is a group of communities

d)

A community is a group of populations

72.

A squirrel in a forest is a member of ___________.

a)

an ecosystem

b)

a habitat

c)

a family

d)

a community

73.

Which of the following is a biotic factor?

a)

soil

b)

temperature

c)

vegetation

d)

salinity

74.

The place where an organism lives is its __________.

a)

habitat

b)

ecosystem

c)

population

d)

organism

75.

What is an adaptation?

a)

A feature that helps a living thing walk.

b)

A feature that helps a living thing survive.

c)

A feature that that helps only animals survive.

d)

A feature that helps only a plant grow.

76.

Behavioural adaptations are:

a)

Behaviours that help a living thing survive in its environment

b)

Body parts that help a living thing survive in its environment

77.

Physical adaptations are:

a)

Body parts that help a living thing survive in its environment

b)

Behaviours that help a living thing survive in its environment

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