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WorksheetsRelationships in Ecosystems
Total questions: 58
Worksheet time: 48mins
Name
Class
Date
1.
What might occur when a carnivore is removed from the food web?
a)
A) Nothing. Organisms cannot impact things below them on the energy pyramid.
b)
B) Primary consumers will overpopulate.
c)
C) Plants will be over browsed by herbivores.
d)
D) both B and C might occur.
2.
Which is NOT an abiotic factor:
a)
soil
b)
air
c)
bacteria;
d)
water
3.
What might happen if you remove a primary consumer from the ecosystem?
a)
There would be more food for secondary consumers.
b)
The number of primary consumers would increase.
c)
The number of plants would increase.
d)
The number of secondary consumers would increase.
4.
How do producers obtain energy?
a)
They conduct photosynthesis.
b)
They consume plants.
c)
They consume primary consumers.
d)
They consume secondary consumers.
5.
A consumer that hunts is called:
a)
a producer.
b)
an omnivore.
c)
a predator.
d)
a herbivore.
6.
A food web can be broken down into several seperate
a)
food chains
b)
food pyramids
c)
producers
d)
consumers
7.
Which represents the largest group in a food web?
a)
carnivores
b)
omnivores
c)
herbivores
d)
producers
8.
anything that an organism needs to live, ex. food, water, space
a)
carrying capacity
b)
resource
c)
succession
d)
denitrification
9.
symbiotic relationship in which one organism benefits and the other organism is harmed
a)
secondary succession
b)
predation
c)
pioneer species
d)
parasitism
10.
a relationship between two in which one species, the predator, feeds on the other species, the prey
a)
chemosynthesis
b)
predation
c)
cellular respiration
d)
commensalism
11.
Network of all food in an ecosystem
a)
ecology
b)
food web
c)
decomposer
d)
food chain
12.
Study of interactions between organisms and their environment
a)
niche
b)
community
c)
ecology
d)
ecosystem
13.
Where an organism lives
a)
habitat
b)
niche
c)
heterotrogh
d)
biosphere
14.
Non-living factor that affects an ecosystem
a)
biotic factor
b)
abiotic factor
c)
food chain
d)
biome
15.
Consumer that eats plants
a)
heterotroph
b)
herbivore
c)
producer
d)
community
16.
Living factors or organisms that affect an ecosystem
a)
abiotic factors
b)
species
c)
trophic level
d)
biotic factors
17.
Series of steps in which organisms transfer energy by eating and being eaten
a)
foodweb
b)
consumer
c)
food chain
d)
omnivore
18.
The unique position that a species has in the physical use of its habitat and in its function (job) within an ecosystem
a)
producer
b)
biotic factors
c)
ecosystem
d)
niche
19.
This is an image of a _________.
a)
consumer
b)
scavenger
c)
decomposer
d)
producer
20.
Consumer that eats animals or meat
a)
carnivore
b)
omnivore
c)
consumer
d)
producer
21.
Organisms that makes its own food using sunlight or chemicals; producer
a)
decomposer
b)
autotroph
c)
heterotroph
d)
herbivore
22.
Which of the following best describes the small bird in the food web above?
a)
primary and secondary consumer
b)
secondary and tertiary consumer
c)
primary consumer only
d)
secondary consumer only
23.
A frog eats a fly. The frog and fly are demonstrating ________.
a)
mutualism
b)
competition
c)
predator/prey
d)
parasitism
24.
A tapeworm inside a dog is
a)
competition
b)
predation
c)
commensalism
d)
parasitism
25.
A tick and a dog have this type of relationship.
a)
mutualism
b)
commensalism
c)
neutralism
d)
parasitism
26.
How many herbivores are in this web?
a)
1
b)
2
c)
3
d)
4
27.
How many primary consumers are there in this food web?
a)
1
b)
2
c)
3
d)
4
28.
Which organism do the owl and the weasel compete for in the food web?
a)
Hawk
b)
Spider
c)
Grasshopper
d)
Shrew
29.
Which of the following is a herbivore?
a)
cricket
b)
frog
c)
hawk
d)
shrew
30.
How many carnivores are shown in this food web?
a)
6
b)
4
c)
5
d)
3
31.
Where did all of the energy in this food web originally come from?
a)
Soil
b)
Producers
c)
Air
d)
Sun
32.
a)
Producer
b)
Primary Consumer
c)
Secondary/Tertiary Consumer
d)
Decomposer
33.
a)
Producer
b)
Primary Consumer
c)
Secondary/Tertiary Consumer
d)
Decomposer
34.
How do producers obtain energy?
a)
They conduct photosynthesis.
b)
They consume plants.
c)
They consume primary consumers.
d)
They consume secondary consumers.
35.
Mold
a)
Producer
b)
Primary Consumer
c)
Secondary/Tertiary Consumer
d)
Decomposer
36.
How many primary consumers are in this food web?
a)
1
b)
2
c)
3
d)
4
37.
Which of the following are abiotic factors in an environment?
a)
People
b)
Cow
c)
Salinity
d)
Chicken
38.
Who are the primary producers in this food web?
a)
The lizard and the Hawk
b)
The Grasshopper and the Mouse
c)
The rabbit and the Hawk
d)
The lizard and the snake
39.
What level consumer could you consider the deer?
a)
Primary
b)
Secondary
c)
Tertiary
d)
Quarternary
40.
What organism consumes both rabbits and birds?
a)
The Hawk
b)
The Wolf
c)
The Plant
d)
The Mushroom
41.
Virtually all plants are autotrophic. But there are no autotrophic animals or fungi. What can you infer about autotrophic organisms?
a)
They can move on their own
b)
They are at the top of the food chain
c)
They can make their own energy
d)
They reproduce slowly
42.
A food web, is a series of interconnected food chains put together to represent an environment. The arrows which represent energy transfer, show energy leaving an organism, to be consumed by another. Who or what does the rabbit, get its energy?
a)
grasshopper
b)
fox
c)
rabbit
d)
green plants
43.
Which of the following could NOT be an example of a prey animal?
a)
Trees
b)
Mice
c)
Rabbits
d)
Snakes
44.
Which organism has the most energy and which organism has the least amount of energy? Choose the best answer.
a)
mosquito and grass
b)
mouse and grass
c)
grass and owl
d)
grass and small bird
45.
Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?
a)
There would be a decrease in the small bird population.
b)
There would be a decrease in the grass/flowers population.
c)
There would be a decrease in the mice population.
d)
There would be an increase in the grass/flowers population.
46.
The arrows in a food web…
a)
Point from predator to prey.
b)
Show the direction of energy flow in an ecosystem
c)
Always point from smaller to larger organisms.
d)
Always point from the larger to smaller organisms.
47.
Does this food web have arrows pointing the right way?
a)
yes
b)
no
48.
Does this food web have arrows pointing the right way?
a)
Yes
b)
No
49.
Most water pollution is the result of __________________.
a)
natural processes
b)
animal waste
c)
human activities
d)
acid rain
50.
Chemicals that kill crop-destroying organisms are called _____________.
a)
sediments
b)
fertilizers
c)
acid rain
d)
pesticides
51.
Which type of water pollution blocks sunlight?
a)
sediment
b)
toxic
c)
nutrient
d)
bacteria
52.
Which of the following is a point source of water pollution
a)
runoff from farms or streets
b)
sediments from erosion
c)
an oil spill from a tanker
d)
acid rain from fuel emissions
53.
Which type of water pollution creates algae blooms?
a)
sediment
b)
toxic
c)
nutrient
d)
bacteria
54.
What is one way that humans can lessen their impact on the environment?
a)
Recycle
b)
Eat more meat
c)
Drive large vehicles
d)
Increase agricultural area
55.
A community is concerned about the water quality of a nearby lake. Increased sedimentation in the lake is endangering the native habitat. The increased sedimentation is most likely caused by which of the following?
a)
trees planted along the shore of the lake
b)
construction of homes along the lake
c)
the amount of sunlight on the lake
d)
the amount of fish in the lake
56.
Whaling was a very profitable profession until whale populations crashed. The global community came together to enact a ban on whaling. However, Japan and Norway have not agreed to stop whaling. Which of the following is the most likely consequence of their decision?
a)
The whale populations are bouncing back very successfully and are unaffected by Japan and Norway continuing to whale.
b)
The whale populations are not rebounding as quickly as they might if all of the countries agreed not to hunt whales.
c)
The whale populations have mutated into new kinds of organisms.
d)
The whales are getting better at avoiding capture.
57.
Salt water is an abundant resource but unusable for irrigation and drinking. As demands on freshwater sources increase, the use of desalination processes to remove salt from ocean water is increasing. A concern of desalinating water is the large amounts of recovered salts that are returned to the ocean. Which of the following describes the most likely impact of desalination on the surrounding ocean environment?
a)
Methane gas would pollute the ocean environment as shoreline organisms begin to die and decay.
b)
Alteration in ocean salt levels would cause loss of species and unbalanced populations in marine food webs.
c)
Nonrenewable resources in the ocean environment would become depleted and upset the ecosystem's balance.
d)
Increased levels of salts and minerals in the ocean would result in overpopulation of marine bivalves due to strengthened shells
58.
The northern elephant seal was almost hunted to extinction in the 1800s. By the late 1890s, approximately one hundred seals were left, reducing the gene pool of the population. What will be the consequence of this reduction?
a)
Competition within the population will increase.
b)
The surviving elephant seals will be better able to adapt.
c)
Inbreeding will be less frequent among the remaining population.
d)
The elephant seals will be more vulnerable to environmental change.
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