Lakhmir Singh and Manjit Kaur Solutions for Chapter: Garbage In, Garbage Out, Exercise 5: Questions Based on High Order Thinking Skills (HOTS)

There are two dustbins A and B of different colours which are installed in a colony for collecting two types of garbage (or waste materials). The waste like broken glass articles and metal objects are put in dustbin A whereas vegetable peels and left-over food are put in dustbin B. Which dustbin contains wastes which can be recycled? Choose from A/B and fill it in the blank provided below.

In one method P of disposal of garbage, the non-useful part of garbage is burnt at a high temperature in a special kind of furnace Q. This reduces a large amount of garbage into a small amount of ash. This ash is then disposed of by dumping in a low-lying area of ground called R.
What are P, Q, and R?

The red worms can convert kitchen waste into natural manure called X. When red worms eat rotting kitchen wastes, a structure Y in their body helps in grinding the wastes which they eat as food. The substance Z is usually mixed with kitchen waste to help the red worms to grind the food inside structure Y. What are X, Y, and Z?

Two separate A and B are dug in the ground about $30$ cm deep. Material C is placed in pit A whereas another material D is placed in pit B. Both the pits are then covered with soil. When the pits were dug up after a month, it was found that material C remained as such, but material D had 'rot' completely. What type of material is C? (Non biodegradable/Biodegradable)

Two separate pits A and B are dug in the ground about $30 \mathrm{cm}$ deep. Material C is placed in pit A whereas another material D is placed in pit B. Both the pits are then covered with soil. When the pits were dug up after a month, it was found that material C remained as such, but material D had 'rot' completely.

What type of material is D? (Non-biodegradable/Biodegradable)

Two separate pits A and B are dug in the ground about 30 cm deep. Material C is placed in pit A whereas another material D is placed in pit B. Both the pits then covered with soil. When the pits were dug up after a month, it was found that material C remained as such but material D had 'rot' completely.

Give one example of material like C.

Two separate pits A and B are dug in the ground about 30 cm deep. Material C is placed in pit A whereas another material D is placed in pit B. Both the pits are then covered with soil. When the pits were dug up after a month, it was found that material C remained as such, but material D had 'rot' completely.

Give one example of material like D.

Two separate A and B are dug in the ground about $30$ cm deep. Material C is placed in pit A whereas another material D is placed in pit B. Both the pits are then covered with soil. When the pits were dug up after a month, it was found that material C remained as such, but material D had 'rot' completely. What is responsible for the rotting of material D?