Our Environment Test

Result

Our Environment Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

Which one of the following is an artificial ecosystem?

A
Pond

B
Crop field

C
Lake

D
Forest
Question 2
1 / -0

An ecosystem includes

A
all living organisms

B
non-living objects

C
both living organisms and non-living objects

D
sometimes living organisms and sometimes non-living objects
Question 3
1 / -0

In the given food chain, suppose the amount of energy at fourth trophic level is 5 kJ, what will be the energy available at the producer level?

Grass → Grasshopper → Frog → Snake → Hawk

A
5 kJ

B
50 kJ

C
500 kJ

D
5000 kJ
Question 4
1 / -0

In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of

A
heat energy

B
light energy

C
chemical energy

D
mechanical energy
Question 5
1 / -0

Organisms of a higher trophic level which feed on several types of organisms belonging to a lower trophic level constitute the

A
food web

B
ecological pyramid

C
ecosystem

D
food chain
Question 6
1 / -0

Flow of energy in an ecosystem is always

A
unidirectional

B
bidirectional

C
multi directional

D
no specific direction
Question 7
1 / -0

Excessive exposure of humans to UV-rays results in

(i) damage to immune system

(ii) damage to lungs

(iii) skin cancer

(iv) peptic ulcers

A
(i) and (ii)

B
(ii) and (iv)

C
(i) and (iii)

D
(iii) and (iv)
Question 8
1 / -0

In the following groups of materials, which group (s) contains only non-biodegradable items?

(i) Wood, paper, leather

(ii) Polythene, detergent, PVC

(iii) Plastic, detergent, grass

(iv) Plastic, bakelite, DDT

A
(iii)

B
(iv)

C
(i) and (iii)

D
(ii) and (iv)
Question 9
1 / -0

Which of the following limits the number of trophic levels in a food chain?

A
Decrease in energy at higher trophic levels

B
Deficient food supply

C
Polluted air

D
Water
Question 10
1 / -0

What will happen if deer is missing in the food chain given below?

Grass → Deer → Tiger

A
The population of tiger increases.

B
The population of grass decreases.

C
Tiger will start eating grass.

D
The population of tiger decreases and the population of grass increases.
Question 11
1 / -0

The decomposers in an ecosystem

A
convert inorganic material to simpler forms

B
convert organic material to inorganic forms

C
convert inorganic materials into organic compounds

D
do not breakdown organic compounds
Question 12
1 / -0

If a grass hopper is eaten by a frog, then the energy transfer will be from

A
producer to decomposer

B
producer to primary consumer

C
primary consumer to secondary consumer

D
secondary consumer to primary consumer
Question 13
1 / -0

Disposable plastic plates should not be used because

A
they are made of materials with light weight

B
they are made of toxic materials

C
they are made of biodegradable materials

D
they are made of non-biodegradable materials

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Re-Attempt Weekly Quiz Competition

Our Environment Test - 4

Result

Our Environment Test - 4

Score

-

Rank

-

SHARING IS CARING

Question 1

Pond

Crop field

Lake

Forest

Question 2

all living organisms

non-living objects

both living organisms and non-living objects

sometimes living organisms and sometimes non-living objects

Question 3

5 kJ

50 kJ

500 kJ

5000 kJ

Question 4

heat energy

light energy

chemical energy

mechanical energy

Question 5

food web

ecological pyramid

ecosystem

food chain

Question 6

unidirectional

bidirectional

multi directional

no specific direction

Question 7

(i) and (ii)

(ii) and (iv)

(i) and (iii)

(iii) and (iv)

Question 8

(iii)

(iv)

(i) and (iii)

(ii) and (iv)

Question 9

Decrease in energy at higher trophic levels

Deficient food supply

Polluted air

Water

Question 10

The population of tiger increases.

The population of grass decreases.

Tiger will start eating grass.

The population of tiger decreases and the population of grass increases.

Question 11

convert inorganic material to simpler forms

convert organic material to inorganic forms

convert inorganic materials into organic compounds

do not breakdown organic compounds

Question 12

producer to decomposer

producer to primary consumer

primary consumer to secondary consumer

secondary consumer to primary consumer

Question 13

they are made of materials with light weight

they are made of toxic materials

they are made of biodegradable materials

they are made of non-biodegradable materials

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