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OTI365 - Olympiad -VI Standard
Olympiad Class VI Science - Garbage and their Disposal Sample Practice Questions with Answer

Olympiad Science - Garbage and their Disposal

Exam Duration: 45 Mins Total Questions : 30

1 )

Observe and identify the figure given below

(a)
bio-degradable waste
(b)
danger
(c)
decomposting
(d)
recycled and reused

Solution :

The given sign is labelled on some products to show that they can be recycled and reused.

2 )

Why should the inorganic garbage be not burnt?

(a)
It pollutes the environment
(b)
Soil becomes warm and dry
(c)
Decomposers in the soil get destroyed
(d)
Water in the soil get dried up

Solution :

Burning of inorganic garbage is crime. It pollutes the environment and causes air pollution. Burning of solid waste is bad to health.

3 )

Observe some of these items given below.

Which of these items cannot be recycled

(a)
P
(b)
Q
(c)
R
(d)
S

Solution :

Biodegradable wastes or organic wastes cannot be recycled

4 )

The exposed garbage bin encourages the spread of

(a)
non-infectious diseases
(b)
deficiency diseases
(c)
congenital diseases
(d)
infectious diseases

Solution :

Houseflies that sit on garbage carries germs to the food particles when it sits on it. When these food substances are consumed cause cholera.

5 )

Anish buried the following in a corner of his garden to dispose them off.
1. A broken egg shell
2. Pencil shavings
3. Dry leaves
4. Plastic carry bags
5. Fruit and vegetable peels
If the corner is dug up 5 years later, which of these is most likely to have remained the same?

(a)
Dry leaves
(b)
A broken egg shell
(c)
Plastic carry bags
(d)
Fruit and vegetable peels

Solution :

Plastic carrybags are non-biodegradable wastes. Hence they should be reduced by regarding.

6 )

Some things were buried in wet ground. Several years later they were dug up. Which thing is most likely to have stayed
the same?

(a)
A newspaper
(b)
A paper cup
(c)
A potato peel
(d)
A plastic glass

Solution :

A plastic glass is a non-biodegradable substance.

7 )

Which of these articles cannot be recycled and used again?

(a)
Newspaper
(b)
Banana peel
(c)
Raincoat
(d)
Plastic bags

Solution :

Banana peel is a biodegradable food substance and it cannot be recycled

8 )

Why should we keep the vermi-composting waste layermoist and loose?

(a)
To allow worms to move
(b)
To allow gases to release
(c)
NOT to allow sufficient air and moisture.
(d)
NOT to decompose the garbage

Solution :

Vermicomposting layer is kept moist and loose to allow worms to move

9 )

Solid kitchen wastes can be

(a)
composted.
(b)
vermicomposted.
(c)
dumped in pit
(d)
all of the above

Solution :

Kitchen wastes are mostly organic wastes. Hence, should be converted to compost by dumping in a pit.

10 )

Non-biodegradable substances should be recycled.

(a)
recycled
(b)
burnt
(c)
composted
(d)
dumped in land fills

Solution :

Non-biodegradable substances should be recycled.

11 )

The rotting and conversion of some materials into manure is called

(a)
recycling
(b)
composting
(c)
garbage
(d)
land fill

Solution :

Rotting and conversion of some biodegradable wastes by the action of decomposers is called composting.

12 )

Which of these is non-biodegradable?

(a)
Newspaper
(b)
Orange peel
(c)
Egg shell
(d)
Coketin

Solution :

Coke tin is a non-biodegradable substance.

13 )

Which of the following products will rot fastest when buried in soil?

(a)
Vegetable wastes
(b)
Plastic bottle
(c)
Glass jar
(d)
Eraser

Solution :

Vegetable wastes are plant products. Therefore, these are biodegradable and can be decomposed easily. On the contrary, man-made products such as plastic and metals take very long time to decompose. Hence they are nonbiodegradable.

14 )

Why is it desirable to use a jute bag for shopping?

(a)
Jute is biodegradable
(b)
Jute bags are stronger.
(c)
Jute is natural
(d)
All of these.

Solution :

Jute bags are stronger and is made of natural product called Jute. Hence, it is desirable to use jute bags for shopping.

15 )

Which of these articles can be recycled and used again?

(a)
Newspaper
(b)
Plastic bags
(c)
Banana peel
(d)
Both (A) and (B)

Solution :

Plastic bags and newspapers can be recycled.

16 )

Which of the following terms is used for rotting and conversion of some materials into manure by using redworms?

(a)
Manuring
(b)
Vermicomposting
(c)
Garbage
(d)
Landfill

Solution :

The rotting and conversion of some materials into manure by red worm is called vermi composting.

17 )

Which of the following processes reduce pollution from animal excreta and organic waste from kitchen and also used economically in producing energy?

(a)
Recycling
(b)
Using them for producing biogas
(c)
Dumping in land fills
(d)
Using them directly as biofertilizers

Solution :

Organic wastes from kitchen and animal excreta are used for producing biogas.

18 )

Indiscriminate disposal of plastic wastes can cause environmental pollution. Which of the following statements is/are true?

(a)
Plastics are made by chemicals
(b)
Plastics are non-biodegradable
(c)
Plastics produce toxic gases when burnt
(d)
All of these

Solution :

Plastics are made up of strong chemicals, when burnt it produce toxic gases and is non biodegradable

19 )

Why is it difficult or impossible to degrade non-biodegradable wastes

(a)
Because non-biodegradable waste can be recycled
(b)
Because microorganisms cannot decompose it
(c)
Because it is a solid waste
(d)
All of the above

Solution :

It is difficult or rather impossible to degrade non-biodegradable wastes because microorganisms cannot decompose them.

20 )

In a campaign to save the environment, the following habits' are encouraged
(i) Reduce the use of paper
(ii) Recycle newspaper
(iii) Reuse paper bags
What is the aim of the campaign

(a)
To conserve petrol
(b)
To use more plastic
(c)
To save the forest
(d)
To avoid water pollution

Solution :

Paper is made from the wood pulp of trees. Hence, by recycling, reducing and reusing the papers. We can save forests.

21 )

Garbage from the city is dumped at the____________

(a)
park
(b)
landfill
(c)
roads
(d)
empty plots

Solution :

The garbage is collected in special trucks and dumped at low lying open areas called landfills.

22 )

What happens to the landfill when it is completely full of useless components?

(a)
The non-useful component is spread over the landfill.
(b)
The full landfill is covered with a layer of soil
(c)
It is converted into a park or a playground.
(d)
All of these

Solution :

No building is constructed over it for at least 20 years as the ground will not be strong.

23 )

What becomes of the useful components of garbage?

(a)
Some of the useful components are converted into compost.
(b)
Aluminium wrappers can be reused as metal
(c)
Iron nails etc. are removed using cranes with magnets and reused.
(d)
All of these.

Solution :

Compost making areas are developed near the landfill site. Vegetable matter can be converted into compost or manure using vermicomposting techniques. Magnets are employed to remove magnetic components of the garbage.

24 )

We get to know that the garbage has completely rotted when

(a)
the foul smell becomes strong
(b)
the foul smell starts coming
(c)
the foul smell stops coming.
(d)
none of these

Solution :

No foul smell and black colour indicates that the rotting process of garbage is complete. This is compost and can be mixed in the soil to make it more fertile. The process of rotting and formation of manure is called composting.

25 )

What condition is required for the survival of earthworms in a vermicomposting pit?

(a)
Earthworms need moisture around them.
(b)
Earthworms cannot survive in very hot or very cold surroundings.
(c)
The pit waste should not contain salt, oil, pickles, vinegar, etc
(d)
All of these

Solution :

Earthworms need moisture around them for respiration through skin. Earthworms cannot survive in very hot or very cold surroundings. Their body temperature will fluctuate as they are not warm-blooded. The pit waste should not contain salt, oil, pickles, meat, milk, vinegar, etc. as these lead to growth of disease causing organisms in the pit. Salt can dehydrate and cause death of earthworms.

26 )

Which one of these can be easily recycled?

(a)
newspaper
(b)
note-books
(c)
glass bottles
(d)
all of these

Solution :

All these can be easily recycled and useful products can be made out of them.

27 )

Which of the following is in the interest of our environment?

(a)
We should re-use plastic bags as much as possible but care should be taken while reusing plastic bags for storing eatables
(b)
The use of plastic should be minimised.
(c)
Plastic should never be burnt.
(d)
All of these.

Solution :

All efforts should be made to save our environment from the harmful effects of plastic waste. Use of plastic must be minimised especially its use as a packaging material, gift-wrapping fancy sheets, etc.

28 )

Till a matching and better environment-friendly substitute for plastics is found, we should use

(a)
paper bags.
(b)
cloth bags
(c)
jute bags.
(d)
all of these

Solution :

Cloth and jute bags can be reused many times. Paper bags after using can be recycled. Cloth, jute and paper are biodegradable. Instead of using plastic plate one can use banana leaf platter at parties as banana leaves can be fed to the cows or can be decomposed in compost pits. Plastic is nonbiodegradable whereas paper, cloth, jute and banana leaf are biodegradable.

29 )

'Save the environment' campaign is conducted in schools throughout the year. We can do our bit by

(a)
recycling used paper
(b)
using both sides of the paper to write
(c)
segregating waste at home and school as biodegradable and nonbiodegradable in their proper bins
(d)
all of these

Solution :

This will make others aware about the need to protect our environment. It will also help in dealing with the huge amount of garbage we generate.

30 )

If there is a lot of left-over food at home then, we should

(a)
refrigerate it and consume it at the time of our next meal.
(b)
give it to the needy or feed-it to the domestic animals or stray animals before it gets spoilt
(c)
both 'a' and 'b'.
(d)
put it in the compost pit

Solution :

Only the spoilt food should be thrown in the compost pit. The food should be eaten before- it gets spoilt. Every effort should be made to preserve excess food.

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Olympiad Class VI Science - Garbage and their Disposal Sample Practice Questions with Answer

Olympiad Science - Garbage and their Disposal

Exam Duration: 45 Mins Total Questions : 30

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