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Populations and Ecosystems

Total questions: 70

Worksheet time: 2hrs 52mins

Name
Class
Date
1.

An example of a population is (a)  

Choose from the below words
all trees in a forest
all maple trees in a forest
all plants in a forest
all animals in a forest
2.

A group of different species that live together and interact in an environment are called a/an (a)   .

Choose from the below words
community
habitat
population
ecosystem
3.

The average number of people per square mile (a)  

Choose from the below words
population distribution
population density
urbanization
population rate
4.
Any thing or organism that regulates the size of a population of another organism is known as __________.
a)
a measure
b)
a limiting factor
c)
factorization
d)
predation
5.

In a forest ecosystem, which of the following is the best example of a limiting factor for a rabbit population?

a)

Squirrel Population

b)

Sunlight

c)

Grass available

d)

Fungi growth

e)

foxes

6.
What year is the zebra population the highest?
a)
1920
b)
2000
c)
1960
d)
2020
7.
According to the graph, What is causing the deer population to decrease
a)
They got sick
b)
The wolf population is decreasing
c)
The wolf population increased
d)
Nothing it's a coincidence
8.
What would the carrying capacity of this graph be
a)
530
b)
400
c)
500
d)
480
9.
One of the main characteristics of a population is its
a)
dynamics
b)
density
c)
change over time
10.
Examples of how humans negatively affect local ecosystems are
a)
Building dams, deforestation (cutting down trees), adding point sources to nearby streams to allow for run-off, building roads and structures, and salting roads.
b)
Creating laws to prohibit fishing from local streams.
c)
Planting trees and other plants to attract native species.
d)
Removing non-native species from the environment.
11.
How does energy enter an ecosystem? 
a)
sunlight
b)
soil 
c)
animals 
d)
invasive species 
12.
A nonliving element in an ecosystem is an 
a)
animal
b)
abiotic factor
c)
biotic factor
d)
organism
13.
Which of the following is not an abiotic factor?
a)
sun
b)
temperature
c)
soil
d)
grass
14.
Which of the following is not a biotic factor?
a)
mushroom
b)
air
c)
elephant
d)
coyote
15.
A system made up of organisms interacting with one another
a)
biology
b)
abiotic
c)
biotic
d)
ecosystem
16.
Deserts, mountains, and rivers are all examples of ________.
a)
vacation spots
b)
tundra
c)
ecosystems
d)
wetlands
17.
What is the main factor that separates the biomes?
a)
Land
b)
Water
c)
Climate
d)
Longitude
18.
Which biome has deciduous trees (which lose their leaves)?
a)
Temperate Forest
b)
Rainforest
c)
Grasslands
d)
Taiga
19.

Which biome has evergreen trees (which don't lose their leaves)?

a)

Taiga

b)

Temperate Forest

c)

Tundra

d)

Grasslands

20.
Which biome has the most variety of plants and animals?
a)
Temperate Forest
b)
Rainforest
c)
Tundra
d)
Grasslands
21.

Is wind a biotic or abiotic factor?

a)

biotic

b)

abiotic

22.

Is soil a biotic or abiotic factor?

a)

biotic

b)

abiotic

23.

Is pH a biotic or abiotic factor?

a)

biotic

b)

abiotic

24.

Is disease a biotic or abiotic factor?

a)

biotic

b)

abiotic

25.

Is sunlight a biotic or abiotic factor?

a)

biotic

b)

abiotic

26.

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.

27.

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.

28.

An ecosystem is made up of __________.

a)

living things only

b)

non-living things only

c)

both living and non-living things

29.

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

a)

true

b)

false

30.

What does the word root 'bio-' mean?

a)

living

b)

dead

c)

science

d)

study

31.
_______________ are the living factors in an environment and may include food sources and other populations.
a)
Community
b)
Competition
c)
Biotic factors
d)
Population
32.
What are the biotic factors in this image?
a)
sunlight, elephants, and grasses
b)
sunlight, water,  and air
c)
elephants, plants, trees 
33.

An individual living things,such as animals or a plants,is called an

a)

Animal

b)

plant

c)

Organism

d)

Nutrition

34.
Which of the following is an example of an interaction between a living and nonliving organism?
a)
a snake using a mouse for food
b)
a worm using the soil as shelter
c)
a bird using an insect for food
35.

Temperature

a)

Biotic (living)

b)

Abiotic (non-Living)

36.

All the living things in an ecosystem are called ______________________ factors.

a)

Ecosystem

b)

Environment

c)

Biotic

d)

Abiotic

37.

Which of the following is NOT a biotic factor?

a)

Coyote

b)

air

c)

elephant

38.
Temperature, light, air, water, and soil are all  _____  parts of the environment
a)
alive
b)
biotic 
c)
abiotic
d)
living
39.
Field mice eat corn. Which would most likely happen if the field mouse population grew?
a)
There would be more corn to feed the field mice.
b)
There would be less corn due to the mice eating it.
c)
The habitat would get overpopulated because the mice woudl eat too much.
40.

Fungi are

a)

Biotic factors

b)

Abiotic factors

41.
An organism that gets food by eating other organisms? 
a)
producer 
b)
consumer
c)
herbivore 
d)
decomposer 
42.
What are producers? 
a)
organisms that store extra food 
b)
organisms that make their own food
c)
breaks down dead organisms 
d)
decomposes nutrients 
43.
What is an organism that breaks down dead organisms and wastes to live and grown? 
a)
herbivore
b)
consumer
c)
producer 
d)
decomposer
44.
Which animals are examples of consumers? 
a)
hawks and plants 
b)
lion and hawks
c)
plankton
d)
algae and fish 
45.
Most ecosystems have many food chains. What are food chains that overlap in an ecosystem and show feeding relationships? 
a)
unhealthy
b)
energy pyramid 
c)
food web
d)
matter
46.
Consumers that eat both plants and animals are?
a)
herbivores
b)
carnivores
c)
omnivores
d)
decomposer
47.
All the members of one species that live within an area of an ecosystem is a?
a)
population
b)
community
c)
niche
48.
The different populations that interact with each other in the same area form?
a)
population
b)
community
c)
niche
49.

Which statement BEST explains the flow of energy as it moves through the different levels?

a)

Energy decreases as it is lost as heat to the environment.

b)

Energy increases as it is gained from the environment.

c)

Energy is unavailable because it is used up by the organisms at Level 1.

d)

Energy is transferred as it is produced by organisms in the next level.

50.

What impact do resources, such as sunlight and water, have on a forest ecosystem?

a)

They limit the carrying capacity of the ecosystem.

b)

They increase habitat areas for new organisms entering the ecosystem.

c)

They decrease the number of diseases resulting from overpopulation.

d)

They alter the rate of photosynthesis, resulting in more oxygen being produced.

51.

A relationship that describes a close interaction between two different species is known as what?

a)

Biodiversity

b)

Population

c)

Symbiosis

d)

Emigration

52.

Which best describes mutualism?

a)

Ticks live and feed on dogs and other animals’ blood to survive.

b)

Mushrooms send out long, underground structures which allow them to grow in other areas.

c)

Ants attack animals that try to feed on the acacia tree, and the ants feed on the nectar of the tree.

53.

The cycling of materials such as carbon, water, and other nutrients are mainly dependent upon soil-dwelling organisms. Use this image to answer questions. Which pair of organisms shown are decomposers?

a)

Fungi and Bacteria

b)

Bacteria and Grass

c)

Fungi and Mice

d)

Mice and Grass

54.

Which is most likely to be a primary consumer?

a)

herbivore

b)

carnivore

c)

omnivore

d)

multivore

55.

Many different organisms live in Amanda’s garden. The diagram shows a simple food web of some of the organisms in her garden. Predation helps maintain the stability of an ecosystem. Which statement BEST describes how this garden ecosystem can benefit from the presence of snakes?

a)

The snakes provide an energy source for the moles.

b)

The snakes consume the mice best adapted to their environment.

c)

The snakes eat moles, which allows the population of mice to increase.

d)

The snakes keep the mice from overpopulating, which could deplete plant resources.

56.

Mutualism, commensalism, and parasitism are examples of

a)

competition

b)

symbiotic relationships

c)

prey adaptations

d)

predation

57.

An organism's particular role or job is its

a)

ecosystem

b)

limiting factor

c)

niche

d)

adaptation

58.

Behaviors that allow species to live successfully in their environment are called

a)

biotic factors

b)

habitats

c)

adaptations

d)

limiting factors

59.

If an organism is living inside another and causing it harm, it is an example

a)

mutualism

b)

commensalism

c)

parasitism

60.

If two organisms benefit from a relationship, it is called

a)

mutualism

b)

commensalism

c)

parasitism

61.

If two organisms have a relationship in which only one benefits, it is an example of

a)

mutualism

b)

commensalism

c)

parasitism

62.

The struggle between organisms to survive in a habitat with limited resources is called

a)

competition

b)

predation

c)

symbiosis

d)

parasitism

63.

Put this food chain in the correct order

a)

Grass

b)

Rabbit

c)

Snake

d)

Hawk

1)
2)
3)
4)
64.

Match the trophic level with the producer/consumer

a)

Trophic Level 1

1.

Energy producer

b)

Trophic Level 2

2.

Primary Consumer

c)

Trophic Level 3

3.

Secondary Consumer

d)

Trophic Level 4

4.

Tertiary Consumer

e)

Trophic Level 5

5.

Apex Predator

65.

How much energy is passed along every trophic level increase?

a)

50%

b)

25%

c)

100%

d)

10%

66.

A field mouse gains 100Kcal of energy from eating berries; how many of these Kcal will transfer to a fox if it eats the mouse?

67.

Which of the following is defined as a consumer that must get its food from a different source than itself?

a)

Producer

b)

Heterotroph

c)

Autotroph

d)

Homotroph

68.
Question Image

Match the following:

a)

Producer/Autotroph

1.

Plant

b)

Secondary Consumer

2.

Bird

c)

Tertiary Consumer

3.

Snake

d)

Apex Predator

4.

Owl

e)

Herbivore

5.

Grasshopper

69.

If there is 2000 kcal (units) of energy at the producer level in this particular ecosystem, how many kcal of energy will be available for hawk?

a)

2000 kcal

b)

200 kcal

c)

20 kcal

d)

2 kcal

e)

0.2 kcal

70.
The fox in this food web would be considered a:
a)
Tertiary Consumer
b)
Producer
c)
Secondary Consumer
d)
Primary Consumer

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