case /data -based (4 Marks)

Question 14 Marks

Vermicomposting is a process of recycling degradable waste.
Earthworms breakdown the waste into compost that can be use as manure.
The diagram shows the details of the process.

$8.$ Which of these statements is true about vermicomposting?
$A.$ It breaks down waste naturally.
$B.$ It produces harmful substances.
$C.$ It requires the presence of light.
$D.$ It takes place in the absence of oxygen
$9.$ Why does vermicomposting require moist condition and moderate temperatures?
__________________________________________________________________________________________________________________________________________________________
$10.$ Which of these is true for the excess water obtained from vermicomposting?
$A.$ It contains earthworms.
$B.$ It is rich in mineral nutrients.
$C.$ It contains vegetable waste.
$D.$ It does not contain microorganisms.

Answer

$8.$ $A.$ It breaks down waste naturally.
$9.$ Mentions that earthworms are most active in moist condition and moderate temperatures.
$10. B.$ It is rich in mineral nutrients.

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Question 24 Marks

The table shows different bins used to collect different types of wastes
.

$1.$ The waste from which bin is suitable for composting?
$A.$ Orange
$B.$ Red
$C.$ Green
$D.$ Blue
$2.$ A children’s park has only green and blue bins.
In which bin should empty juice cans be dumped? Explain your answer.
$3.$ Why should we recycle materials?
Circle $‘Yes’ $ or $‘No’$ for the correct response.

Why do we recycle materials?	$Yes$ or $No$
To save natural resources	$Yes/No$
To make products stronger	$Yes/No$
To create beautiful products	$Yes/No$

$4.$ Why is burning of crop residue harmful?
$5.$ WWhich of these is an example of reducing waste at home?
Circle $‘Yes’$ or $‘No’ $ for the correct response.

Will this reduce waste?	$Yes$ or $No$
Buying use-and-throw pens	$Yes/No$
Using old cloth to make grocery bags	$Yes/No$
Reusing cookie jars to store sugar	$Yes/No$

$6.$ Why should plastic waste not be dumped in landills?
$A.$ It has a low melting point.
$B.$ It does not degrade over time.
$C.$ It reacts with some vegetable wastes.
$D.$ It produces harmful gases on burning.
$7.$ Should plastic waste be dumped in water bodies? Explain your answer.

Answer

$1. C.$ Green
$2.$ Mentions that the used juice cans should be dumped in the blue bin as the cans can be recycled.
For example
● Blue bin. Used juice cans can be recycled.
$3.$ Yes
No
No
$4.$ Mentions that burning of crop residues produce dust and smoke that
pollute the air.
$5.$ No
Yes
Yes
$6. B.$ It does not degrade over time.
$7.$ Mentions that plastic wastes should not be dumped in water bodies as aquatic animals can eat the waste and fall sick.

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Science case /data -based (4 Marks)

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