Question
It is not wise to sleep under a tree during night. Why?

Answer

During the day, plants photosynthesise in the presence of sunlight and uses $CO _2$ produced during respiration. During this process $O _2$ is released as a byproduct and a balance between $O _2$ and $CO _2$ is maintained in the atmosphere.
But in the night, plants do not photosynthesise. Moreover, during night they produce $CO _2$ and take $O _2$ during respiration. This leads to the increase in the proportion of $CO _2$ in the air.
So, if one sleeps under a tree at night, he will have problems in breathing as the amount of $CO _2$ in the air around will certainly be more than oxygen.
Therefore, it is not advisable to sleep under trees during night because the person will suffer from suffocation and will feel excess weight on chest.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Show the shape of the distance-time graph for the motion when a car parked on a side road.

The picture in Figure 8.4 shows tree line along the sea coast on an island near the equator. As shown, the tree tops are permanently bent in one direction. Are the trees bent towards the sea or away from it? Explain.

A person met with an accident while driving. After examination, the doctor told him that since he got a fracture in the wrist, operation would be required. After the operation, the patient was put on a glucose drip and was not given food for a few hours.
(i) Why was the patient not given food directly?
(ii) How does the glucose help the patient recover?
Explain the importance of understanding the properties of different materials, and how does this helps in everyday life?
Explain the process of rusting of iron, and measures to prevent the same.
The sun plays a major role in the change of weather. How can you explain it?
Paheli uprooted a rose plant from the soil. Most of the root tips, with root hairs got left behind in the soil. She planted it in a pot with new soil and watered it regularly. Will the plant grow or die? Give reason for your answer
Boojho, Paheli and their friend Golu were provided with a test, each containing China rose solution which was pink in colour. Boojho added $2$ drops of solution $‘A’$ in his test tube and got dark pink colour. Paheli added $2$ drops of solution $‘S’$ to her test tube and got green colour. Golu added $2$ drops of solution $‘C$ but could not get any change in colour. Suggest the possible cause for the variation in their results.
What will happen if there are no platelets in the blood?
Explain the following:
  1. Galvanisation.
  2. Crystallisation.