Ramesh set off on a journey through the sea in a boat with a small group of people. After five day of their journey, a large wave came and the boat flipped over, sending everyone into the water. Only Ramesh, somehow, was able to board the boat again; everyone else perished in this disaster. Ramesh has no boating experience. He spent a few days caught in the middle of the sea. There is no water to drink on the boat and as he got very thirsty, he drank seawater. He also managed to do fishing and eat those fish as he has gone starving.

"If Ramesh is caught for more than four days in between the sea, he will probably die even though he is fed on fish". Do you agree with this statement? Give reasons for your answer.

Trupti did not attend the school for 10 days as she had an accident and was having rest at her home. Trupti would ask her grandmother to read out the books to her and also explain it to her. Today her grandmother is explaining about physical matter. After explaining the complete chapter to Trupti se wrote the following question in her notebook and asked Trupti to answer it the next day.
A substance $\mathrm{P}$ can exist in a three physical state: solid, liquid and gas. No living things on the earth can exist in the absence of this material. The material falls from the clouds in the form of $\mathrm{Q}$. Lack of $\mathrm{Q}$ for long periods in an area can cause $\mathrm{R}$ whereas excess of $\mathrm{Q}$ may cause $\mathrm{S}.$

Could you help Trupti in answer the question.

1. What do $\mathrm{P}, \mathrm{Q}, \mathrm{R}$ and $\mathrm{S}$ represent?

2. What is the solid-state of $\mathrm{P}$known as?

Shivalik is a 6th grade student. One day in his class, the teacher was teaching the sources and importance of water on the earth. While teaching, the teacher explained that $71\%$ of the earth’s surface is covered with water. Of the freshwater available on earth, nearly $20\%$ is found as ground-water and surface water. The teacher also explained that we can use only up to $3\%$ of this.
At the end of class, the teacher asked the students, "Why can’t we make optimum use of this water?" but the students failed to answer the question.

Help the students in answering the above question.

Gagan's mother is a high school teacher. One day, she was getting ready for a school function in a subdivision of a district, so she was late for her bus. Therefore, she quickly took a bath, got ready, and went to catch the bus. While going, she left the bathroom tap running by mistake. Gagan heard the sound of a running tap and found himself without any ideas.

So, from the above comprehension, answer the below question.

1. What has to be done by Gagan in such a situation? Select the answer from the following and explain your answer.

2. Can you find some other ways to save water?

It was a rainy season. Due to the heavy storm last night, the lid of the water tank got blown away in Bhumi’s house. So a lot of dust and soil got mixed in the water. As a result, muddy water was coming out of the tap. They got the lid repaired.
Bhumi asked her mother to use this dirty water for some other purposes and suggested to refill the water tank with fresh water once all the dirty water is used and the tank is cleaned.

For which activities this dirty water can be used? What values are shown by Bhumi in her actions?

On a sunday morning Sanjana and Rahul were playing in the park with all their friends.

After a while, Rahul got thirsty and he went to a public tap in the park and drank water from it. But he didn't turn off the tap properly and left the tap dripping. Sanjana, on the other hand, drank water she brought from home and also turn off the dripping tap. What values are shown by Sanjana?

One day Ms. Shah, a science teacher explained about water cycle to her class $6^{\mathrm{th}}$ students.
The process of conversion of water into vapour and vapour again to water is called the water cycle. It is also known as the hydrological cycle. 

Riya had a doubt and asked Miss Shah, "What will happen if the water cycle in nature gets disturbed?"

Rakshit and his friends go to school on bicycles every day. The winters have arrived and the morning temperature of the city has decreased to about $2°\mathrm{C}$. Their school starts at $8$ o'clock so they leave their houses at about $7:20 \mathrm{AM}$.

The other night Rakshit's father was listening to a news report about several accidents that took place that morning. What can be the reason behind this?
Rakshit's father has advised certain measures that would help them in tackling the weather challenges, could you think of some of these measures?