Read the following text and do the tasks that follow. You might think that you need to boil liquid water to create water vapour—but you do not. You…
SEE Class 10 English · 2080 · Solved Question with Answer
Read the following text and do the tasks that follow.
You might think that you need to boil liquid water to create water vapour—but you do not. You just need some liquid water at room temperature. Picture a glass of water. If you could zoom in with super vision (not actually possible), you would see that this water is made of a bunch of molecules—water molecules. Although these molecules are themselves made of three atoms: two hydrogens and one oxygen. Let's just think of them as tiny balls.
These tiny water balls are moving around in the water but stay fairly close to their ball neighbours. This motion isn't due to currents in the water, instead this is thermal motion. Imagine these tiny balls jiggling around in a giant collection of balls. The hotter the water, the greater the motion of these water balls. But wait! The speeds of the water particles are not all the same. Although there is an average ball speed, some are going faster and some are going slower. It's just like the height of a group of adult humans. There is an average height, but everyone is not the same. Some people are very tall, but that's just a small fraction of the total group.
2.1 Write 'TRUE' for true statements and 'FALSE' for the false ones. (5×1=5)
I. The author claims that water vapour is formed only at boiling temperature.
II. Water molecules are easily visible.
III. Water molecules are taken as tiny water balls in the text.
IV. The tiny water balls move at the same speed.
V. Average height means all the people are of the same height.
2.2 Answer the following questions. (5×1=5)
I. What are water molecules made up of?
II. What is the cause of the movement of water particles in room temperature?
III. How does heat affect the movement of water particles?
IV. What is done to measure the movement of molecules?
V. Why does the author compare the speed of water particles to the heights of adult humans?