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our environment

Total questions: 40

Worksheet time: 41mins

Name
Class
Date
1.

What does a food chain always start with?

a)

The herbivore

b)

The carnivore

c)

The producer

d)

The consumer

2.

Which of the following is a primary consumer in a grassland ecosystem?

a)
b)
c)
d)
3.
What is the study of the interactions among organisms and  between organisms and their environments called?
a)
Biology
b)
Ecology
c)
Astronomy
d)
Biosphere
4.
The direction of the flow of energy in a food web is represented by ___.
a)
Light bulbs
b)
Dotted Lines
c)
Arrows
d)
Bubbles
5.
Energy increases as you move up the food pyramid (from bottom to top).
a)
True 
b)
False
6.

What percentage of energy is passed on to next tropic level?

a)

10%

b)

50%

c)

90%

d)

100%

7.

What is this called?

a)

Food Web

b)

Food Chain

c)

Abiotic Factors

d)

Biotic factors

8.

Which organism recieves the least amount of energy from the producer?

a)

Owl

b)

Grasshopper

c)

Lilypad

d)

Mouse

9.
All energy on Earth ultimately comes from what source?
a)
Water
b)
Sun
c)
Consumers
d)
Oxygen
10.
Why is there a limited amount of energy that can be passed on to the next feeding level?
a)
There is never enough sunlight available. 
b)
Some ecosystems have limited resources. 
c)
Organisms use some of the energy they get from eating.
d)
All the energy is available to be passed on. 
11.
The largest group of organisms found in a food web would be:
a)
Primary Consumers
b)
Producers
c)
Decomposers
d)
Tertiary Consumers
12.

The phenomenon by which toxins concentrate in the organisms at higher trophic levels within an ecosystem is known as...

a)

Biotoxicity

b)

Biomagnification

c)

Eutrophication

d)

Predation

13.

Consider the following food chain:

Algae > Mayfly > Minnow > Trout


In a polluted ecosystem, which organism is likely to have the HIGHEST level of toxic chemicals in its body?

a)

Algae

b)

Mayfly

c)

Minnow

d)

Trout

14.

What does the Ozone in the atmosphere do?

a)

causes the greenhouse effect

b)

causes acid rain

c)

protects the Earth from harmful infrared (IR) rays

d)

protects the Earth from harmful ultraviolet (UV) rays

15.

What damage can UV rays cause?

a)

can cause sunburn.

b)

can cause some types of skin cancer.

c)

cataracts.

d)

all of the above

16.

Identify the non- biodegradable substance from the following.

a)

Paper

b)

Tin cans

c)

Vegetable peels

d)

Wood

17.

An artificial ecosystem is

a)

Pond

b)

Forest

c)

Desert

d)

Crop field

18.

Each step of a food chain is called as

a)

Trophic level

b)

Food web

c)

Eutrophication

d)

Biological magnification

19.

Which of the following constitute a food chain?

a)

Grass, tiger and ant

b)

Tiger, goat and human

c)

Goat, human and grass

d)

Human, fish and crab

20.

Calculate the amount of energy available to snake in the given food chain if there is 6500 J of energy available to grass hopper.

Grass ----> grass hopper ---> frog -----> snake

a)

6500 J

b)

650 J

c)

65 J

d)

6.5 J

21.

Why do we need to manage the garbage we produce

i)To improve the health and quality of life

ii)For preventing environmental pollution

iii) To produce more biodegradable plastics

iv) To reduce the strain on natural resources

a)

i and iv

b)

iii and ii

c)

i, ii and iii

d)

i,ii and iv

22.

Non biodegradable waste materials can be treated by composting technique.

a)

true

b)

False

23.

Non biodegradable wastes can be managed by practicing techniques like

a)

Reduce Reuse Reabsorb

b)

Reduce reuse recycle

24.

Environment is damaged by use of paper bag.

a)

True

b)

false

25.

Ozone layer protects us from harmful ultra-violet radiations of the sun.

a)

Ture

b)

false

26.
Use the diagram answer the question.
What is a fitting description for this diagram?
a)
A Food Chain
b)
An Ecosystem
c)
A Food Web
d)
Biotic and Abiotic Factors
27.
True or False. In this Food Web Pyramid the consumers on each level only get about 10 percent of energy that the plants have stored.
a)
True
b)
False
28.
__________ is an organism that only eats plants for energy.
a)
Carnivore
b)
Herbivore
c)
Omnivore
d)
Terivore
29.
__________ is an organism that only eats meat for energy.
a)
Omnivore
b)
Borivore
c)
Herbivore
d)
Carnivore
30.
__________ is an organism that eats BOTH plants and animals for energy.
a)
Omnivore
b)
Darnivore
c)
Carnivore
d)
Herbiovre
31.

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.

32.
An organism that gets energy from eating other organisms is a ______________
a)
producer
b)
consumer
c)
decomposer
d)
prey
33.
The arrows in a food chain or web represents what?
a)
They point to the organism that is being eaten.
b)
It shows how sunlight flows within an ecosystem.
c)
They show what direction the energy is flowing between organisms. 
d)
They represent how water is transferred within a habitat.
34.
In this food chain, what will happen if the frogs become extinct?
a)
The snakes will increase.
b)
The grasshoppers will decrease.
c)
The eagles will remain the same.
d)
The grasshoppers will increase.
35.
A food chain shows the transfer of ___ from one organism to another. 
a)
matter
b)
consumers
c)
energy
d)
habitat
36.
What are the organisms that break down dead stuff?
a)
Producers
b)
Consumers
c)
Decomposers
d)
Organisms
37.

Which level of the food chain is most affected by biomagnifications?

a)

Producers

b)

primary consumers

c)

secondary consumers

d)

tertiary consumers

38.

What is Biomagnification?

a)

the growth of an organism over time

b)

the increase in concentration of harmful chemicals in organisms at higher levels in the food web

c)

the increase in population of a species over time

d)

the increased significance of a species roll in an ecosystem

39.

Which type of radiation is absorbed by the ozone layer?

a)

infrared

b)

gamma

c)

visible light

d)

ultraviolet

40.
Which layer in the atmosphere protects us form harmful UV radiation?
a)
Ozone
b)
Troposphere
c)
Ionosphere
d)
Exosphere

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