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ecosystem review

Total questions: 62

Worksheet time: 5hrs 36mins

Name
Class
Date
1.
The way living organisms interact with each other in a particular environment/community is called...
a)
Ecosystem
b)
Biome
c)
Habitat
d)
Abiotic
2.
Non-living things that are a part of a biome is called...
a)
Habitat
b)
Abiotic
c)
Biotic
d)
Ecosystem
3.
Which one of these is an abiotic factor?
a)
grass
b)
tree
c)
water
d)
soil
4.
Which belongs to aquatic biome?
a)
estuary
b)
savannah
c)
prairie
d)
tundra
5.
What do consumers do in the food chain?
a)
They obtain energy from other organisms. 
b)
They break down dead plant and animal material. 
c)
They use sunlight to make food. 
d)
They are parasites of plants. 
6.
Many cactus plants have very sharp needles and thorns. How does this help them survive in a desert environment?
a)
Birds do not build their nests in cactus plants because of the needles.
b)
The needles and thorns allow the cactus plants to lose excess heat.
c)
Thirsty animals will not eat the cactus plants to get the water they contain. 
d)
The needles and thorns help the cactus plants spread their seeds. 
7.
Why are decomposers in the soil important? 
a)
Decomposers in the soil convert carbon dioxide to sugars. 
b)
Decomposers in the soil provide oxygen for plants. 
c)
Decomposers in the soil provide energy for animals.
d)
Decomposers in the soil return carbon and nitrogen to the ecosystem. 
8.
A population of small fish and a population of small squids eat the same type of krill (a type of plant) in the same ecosystem. Krill is the main source of food for both the fish and squid. If the squid grows faster than the fish population, what will most likely happen to the fish population? 
a)
The fish population will stay the same size. 
b)
The fish population will start to grow faster. 
c)
The fish population will get smaller or even die out. 
d)
The fish population will start to eat more krill than the squids. 
9.
Which of the following food chains shows the correct energy flow left to right? 
a)
rabbit-coyote-grass
b)
grass-rabbit-coyote
c)
coyote-rabbit-grass
d)
grass-coyote-rabbit
10.
What role do bacteria play in a pond ecosystem?
a)
Bacteria are herbivores that make their own food in the ecosystem. 
b)
Bacteria act as consumers of live fish. 
c)
Bacteria provide food for frogs. 
d)
Bacteria are decomposers of dead plants and animals. 
11.
Skunks live in North America. When they are threatened, they spray a strong-smelling liquid at predators to scare them away. When rabbits find themselves in trouble, their instinct is to run away as fast as they can. They use their speed and quickness to escape. Although these two animals are different, which of the following is one way in which they are the same? 
a)
They spend a lot of time in trees. 
b)
They have adapted ways to protect themselves. 
c)
They both use speed to escape enemies. 
d)
Fighting predators is their weakness. 
12.
A certain plant needs a light but a lot of water to survive. In which of the following ecosystems would this plant most likely be found? 
a)
grassland
b)
ocean
c)
desert
d)
rain forest
13.
Which of the following best describes the roles of bacteria and other microorganisms in an ecosystem? 
a)
They all cause life-threatening diseases in animals, including humans. 
b)
They are too small to have any effect o the rest of the ecosystem. 
c)
They are all parasites, taking the food from plants and animals. 
d)
They perform many valuable jobs in an ecosystem, including decomposition. 
14.
Which of the following ecosystems would best support a population of deer? 
a)
desert
b)
swamp
c)
forest
d)
coastline
15.
Why are decomposers necessary in the food chain? 
a)
They provide nutrients for plants. 
b)
They photosynthesize.
c)
They are food for carnivores. 
d)
They prey on herbivores. 
16.
Which of the following directly use the Sun's energy to produce their own food? 
a)
decomposers
b)
carnivores
c)
consumers
d)
producers
17.
Which of the following food chains shows the correct energy flow from left to right. 
a)
rabbit--owl--grass
b)
grass--rabbit--owl
c)
owl--rabbit--grass
d)
grass--owl--rabbit
18.
Why are tropical rain forests found along the equator? 
a)
There is warm, moist air in this part of the world. 
b)
These areas are very close to the ocean. 
c)
The soil there is very rich. 
d)
The westerly winds bring a lot of rain clouds. 
19.
Which of the following would have the smallest effect on the size of an animal's population?
a)
the amount of food
b)
the number of predators
c)
the amount of daylight
d)
the size of its habitat
20.
Which of the following ecosystems is most likely to have temperatures that range from very hot in the summer to very cold in the winter? 
a)
rain forest
b)
grasslands
c)
desert
d)
arctic
21.
An animal that eats both plants and animals as food
a)
omnivore
b)
niche
c)
herbivore
d)
carnivore
22.
An organism that makes its own food
a)
consumer
b)
decomposer
c)
producer
d)
carnivore
23.
Air, water, energy, rocks and climate
a)
abiotic
b)
biotic
c)
biome
d)
producer
24.
Plants, animals, and organisms.
a)
abiotic
b)
biotic
c)
consumer
d)
herbivore
25.
An animal that eats only plants
a)
omnivore
b)
herbivore
c)
carnivore
d)
decomposer
26.
An animal that eats only other animals as food
a)
omnivore
b)
carnivore
c)
consumer
d)
herbivore
27.
An organism in a community that must eat to get the energy it needs because it cannot produce it's own food.
a)
herbivore
b)
consumer
c)
producer
d)
omnivore
28.
Which of the following is a herbivore?
a)
cricket
b)
frog
c)
hawk
d)
shrew
29.
A consumer that hunts is called:
a)
a producer.
b)
an omnivore.
c)
a predator.
d)
a herbivore.
30.
Which of the following best describes the wolf's role in this ecosystem?
a)
herbivore
b)
omnivore
c)
carnivore
d)
decomposer
31.
Which of the following best describes the deer's role in the ecosystem?
a)
herbivore
b)
omnivore
c)
carnivore
d)
decomposer
32.
An organism that gets energy from eating other organisms is a ______________.
a)
producer
b)
consumer
c)
decomposer
d)
prey
33.
Which of the following would have a negative impact on an ecosystem
a)
constructing highways
b)
planting trees
c)
recycling paper
34.
How is wind an important factor to the ecosystem?
a)
It gives animals air. 
b)
It creates new air. 
c)
It carries seeds to knew locations.
d)
It helps propel the water cycle.
35.
What is missing from this food chain?
Grass > Grasshopper > Bird > Snake
a)
Producer
b)
Primary Consumer
c)
Secondary Consumer
d)
Decomposer
36.
Which of the following is a way that humans could change/destroy an ecosystem?
a)
Mowing the grass
b)
Building a shopping center
c)
enjoying a picnic
d)
watching tv
37.

What is an ecosystem?

a)

A community of living and nonliving things interacting with each other

b)

The community of living things

c)

The community of non living thing

38.

A mouse eats seeds and insects. Which best describes the role of the mouse?

a)

consumer

b)

decomposer

c)

herbivore

d)

producer

39.

What would most likely result if all plants in an area were destroyed?

a)

Consumer populations would increase because more sunlight would reach the ground.

b)

Decomposer populations would increase because more sunlight would reach the ground.

c)

Consumer populations would decrease because plants provide them with water.

d)

Consumer populations would decrease because plants provide them with energy.

40.

What would most likely happen if all of the decomposers in an ecosystem were removed?

a)

The animals in the ecosystem would die because of the spread of disease.

b)

The plants in the ecosystem would eventually die because of a lack of nutrients in the soil.

c)

The plants in the ecosystem would begin to die out because of a decrease in available water.

d)

The animals in the ecosystem would eat other types of food because of a decrease in producers.

41.

A food chain in an ecosystem includes blackberry bushes, deer, and wolves.

• Deer eat blackberries.

• Wolves eat deer.

If the population of wolves decreases, how will this affect the population of blackberry bushes?

a)

It will decrease because there will be fewer deer.

b)

It will increase because there will be fewer deer.

c)

It will decrease because there will be more deer.

d)

It will increase because there will be more deer.

42.

An example of a decomposer is ____________________.

a)

eagle

b)

grass

c)

frog

d)

mushroom

43.

An example of a producer is ____________________.

a)

cricket

b)

mushroom

c)

grass

d)

spider

44.

An example of a consumer is ____________________.

a)

fungi

b)

cricket

c)

flower

d)

mushroom

45.

All energy in ecosystems comes from _________________.

a)

the Earth

b)

the soil

c)

the rain

d)

the sun

46.

Which of the following choices is two consumers?

a)

grass and grasshopper

b)

rabbit and dog

c)

mushroom and wolf

d)

turtle and flower

47.

What is the role of a producer?

a)

to eat consumers

b)

provide food for carnivores

c)

to make food for themselves and other organisms

d)

to make carbon dioxide & oxygen

48.

Which of the following statements best describes a decomposer?

a)

They are abiotic and only eat producers that are biotic.

b)

They are abiotic and eat both plants and animals.

c)

They are biotic and break down dead material.

d)

They consume other biotic things for energy.

49.

In an ecosystem, many birds depend on insects. If pesticide is spread to control the insect population, which of the following will most likely happen?

a)

The bird population will increase.

b)

The bird population will decrease.

c)

The bird population will increase then decrease.

d)

The bird population will decrease then increase.

50.

Animals that hunt other animals to eat are called

a)

prey

b)

omnivores

c)

predators

d)

herbivores

51.

What is an organism?

a)

Plants, animals, and microscopic organisms

b)

Rocks, water, and air

c)

Animals that eat other animals

d)

Living things and their physical surroundings

52.

Which environment is hot and wet most of the year? It also has thousands of different plants and animals including monkeys.

a)

grassland

b)

forest

c)

rainforest

d)

desert

53.

Deciduous Forest Plants

a)

maple tree, oak tree, birch tree

b)

deer, squirrel, black bear

c)

acacia trees, baobob trees, scutch grass

d)

hemlock, white spruce, jack pine

54.

Which aquatic ecosystem is found where the freshwater rivers meet the ocean?

a)

ocean

b)

estuary

c)

lake

d)

pond

55.

The mixture of saltwater and freshwater in an estuary is called __________________ water.

a)

brackish

b)

semi-salty

c)

partially-salty

d)

sorta-salty

56.

Which of the following can be found in the estuary? Check all that apply.

a)

decaying leaves

b)

sharks

c)

saltmarsh grasses

d)

seaweeds

57.

a marshy tract that is wet with salt water or flooded by the sea.

a)

tropical

b)

pollutants

c)

terrestrial

d)

salt marsh

58.

Where fresh water mixes with salt water (Brackish)

a)

Estuary

b)

Terrestrial

c)

Tundra

d)

Desert

59.

You may see a cactus in a dry area with little or no precipitation or vegetation

a)

desert

b)

marine

c)

estuary

d)

freshwater

60.

North Carolina has a forest biome with many kinds of trees that lose their leaves each autumn.

a)

desert

b)

deciduous forest

c)

tundra

d)

taiga

61.

Which ecosystem has four distinct seasons?

a)

Tundra

b)

Grassland

c)

Rain Forest

d)

Deciduous Forest

62.
What is one thing both "hot" and "cold" deserts have in common?
a)
All the land is made of sand
b)
Underground water filters impurities from the sand.
c)
There is a dramatic change between night and day temperatures.
d)
Both get regular predictable rainfall. 

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