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CBSE Questions for Class 6 Biology Garbage In Garbage Out Quiz 2 - MCQExams.com
CBSE
Class 6 Biology
Garbage In Garbage Out
Quiz 2
We must not use plastic bags to store eatables.
Is the above statement true or false?
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True
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False
Explanation
Plastic bags, especially recycled and washed ones must not be used to store eatables as it may lead to the poisoning of food.
Hence the statement is true.
Recycling is the disposal of waste paper by burning.
Is the above statement true or false?
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True
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False
Explanation
The given statement is false. Recycling is the conversion of discarded paper into reusable/art forms.
Plastic bags should be used to store cooked food items.
Is the above statement true or false?
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True
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False
Explanation
Plastic bags must not be used to store cooked food items because they may have poisonous substances that may enter the food.
Hence the given statement is incorrect.
'Landfill' can be used for developing parks and?
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Powerplants
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Dams
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Residential areas
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Playgrounds
A redworm can eat food equal to its body weight each day.
Is the above statement true or false?
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True
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False
Explanation
Redworms are organisms that help in converting organic wastes to manure via vermicomposting. They consume these wastes and can eat food equal to their body weight each day.
Hence the statement is true.
Which of the following is true about redworms?
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They are a type of roundworms.
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They have teeth
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They are used in vermicomposting
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They live in very hot conditions
Explanation
Redworms are a type of earthworms that are used in vermicomposting. They grow well in moist conditions. They do not have teeth but possess gizzard for the grinding of food.
Hence the correct option is C.
Redworms survive in very hot conditions.
Is the above statement true or false?
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True
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False
Explanation
Redworms cannot survive in very hot or cold conditions. They require moist soil.
Hence the given statement is false.
Which of the following is mostly a degradable pollutant?
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DDT
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Aluminium foil
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Domestic wastes
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Mercury salts
Explanation
Pollutants can be classified as degradable or non-degradable, based on their ability to be degraded upon disposed of.
A degradable pollutant degrades after some time, either automatically (e.g., heat) or through the agency of microorganisms (e.g., domestic sewage, livestock wastes, market garbage).
Among the following, domestic wastes are mostly degradable while others are not.
So, the correct answer is option C.
Improper disposal of domestic waste may be
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Toxic
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Not hazardous
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Efficient
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None of the above
Which of the following can be considered as domestic waste?
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Radioactive solutions
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Chemical solvents
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Chemical exhaust
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None of these above
Domestic waste contains:
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Non-biodegradable pollutants
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Biodegradable pollutants
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Hydrocarbons
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Both A and B
Explanation
Degradable pollutants degrade after some time, either automatically or through microbial action, e.g., biodegradable sewage, livestock wastes, garbage, and domestic wastes.
Biodegradable wastes mean wastes that can be cleared by biological agents like microorganisms.
Biodegradable pollutants are easily disposed of or degraded through natural processes or waste treatment plants.
Domestic wastes contain both biodegradable pollutants and non-
biodegradable pollutants.
So, the correct option is 'D'.
Which of the following statements is correct in the case of vermicompost?
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Prepared from plant and animal waste by worms.
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Harmful for the animals living in the soil.
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Cannot be used by farmers as it is toxic.
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Needs a lot of space and time to form.
Explanation
The garbage collected from various households and other places is put into landfills. Inside landfills, garbage is allowed to settle down and decompose, which is further used as manure.
When microorganisms or worms are added to fasten the process of decomposition, the process is called vermicomposting.
So, option A "Prepared from plant and animal waste" is the correct answer.
Domestic waste will mainly lead to:
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Biodegradable pollution
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Nondegradable pollution
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Thermal pollution of soil
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Air pollution
Explanation
Domestic sewage primarily contains biodegradable organic matter, which readily decomposes by bacteria and other micro-organisms, which can multiply using these organic substances as substrates and hence utilise some of the components of sewage.
Hence, correct answer is option A.
Garbage collected from our houses should be dumped in a ____.
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Garden
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A playground
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Land fill
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The road side
Explanation
Garbage collected from our houses should be dumped in a landfill because they use clay liners to isolate trash, while a municipal solid waste (MSW) landfill can use synthetic or clay liners.
The purpose of a landfill is to isolate waste from its surrounding environment, preventing water contamination and contact with air.
This landfill gas is collected in pipes and recycled into electricity and fuel. Materials that may be dangerous, such as hazardous or radioactive waste are not allowed at the landfill.
So, the correct answer is 'Landfill'.
Which one is recyclable waste?
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Paper
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Torn clothes
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Metallic and plastic discards
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All the above
Explanation
Recyclable wastes can be reused into new materials. For example, paper can be recycled and this will reduce deforestation because the paper is made from wood pulp. Torn clothes can be recycled to form bags and into other usable forms. Metallic and plastic discards can be melted and recycled into usable forms any number of times. Recycling reduces environmental pollution and uses less energy as compared to the production of new materials from raw materials.
Hence, all the options are correct.
So, the correct answer is 'All the above'.
Rag pickers separates
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Plastic, polythene, paper and metal wastes
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Rags, cardboard, glass articles
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Both (a) and (b)
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Food articles
If a garbage bin contains the following articles.
Newspaper, Bread, Plastic bags, Raincoats, Rubber slippers.
Which of the articles can be recycled and used again?
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Newspaper
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Bread
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Raincoat
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Plastic bags
If a garbage bin contains the following articles-
newspaper, bread, plastic bags, raincoats, rubber and slippers.
Which of the articles can be recycled and used again?
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Newspaper
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Bread
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Raincoat
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Plastic bags
Vermicomposting is:-
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The process of adding earthworms to the waste material to help decomposition.
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Using ultraviolet radiation to kill ,the harmful microorganisms present in the drinking water.
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Cutting pupil of the eye with the laser beams to give better sight to the people.
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Medication used to remove dandruff of the hair.
Explanation
Vermicomposting is a method by which compost or mixed manure of organic origin is prepared by the use of earthworms.
It is a controlled degradation or decomposition of the organic wastes for the consumption of earthworms which helps in the recycling of food wastes, reduces the waste bulk density and the final product may contain hormone-like substance which accelerates the plant growth.
So, the correct answer is 'The process of adding earthworms to the waste material to help decomposition'
Vermicomposting is more expensive than buying chemical fertilizers.
Is the above statement true or false?
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True
0%
False
Explanation
Vermicomposting involves the use of earthworms to convert the waste into manure. It is much more cheaper than buying chemical fertilizers.
Hence the given statement is false.
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