BGS
National Public School
Hulimavu, Bangalore – 560076
Date: 3rd
July 2013
Tell Me Why
– Questions
|
Sl
No
|
Name
of the student
|
Class
|
Question
|
|
1.
|
Simran
|
VII C
|
A Horse shoe magnet’s poles are
on one side, then how can we say every magnet points towards North South
direction?
|
|
2.
|
Mukthar
|
IX B
|
How can you explain the features of a mosquito on the basis of its
gender?
|
|
3.
|
D. Siddharth
|
X B
|
What is surface tension?
|
|
4.
|
Devprakash
|
VII D
|
How does an engine generate power?
|
|
5.
|
Abhiram
|
VI C
|
When we run fast and we stop suddenly, why do our ribs pain?
|
|
6.
|
Amit S
|
VII A
|
Since the radicle of a plant grows first in the soil. How does it get
oxygen in the rainy season for the one or two days until the plumule sprouts
up?
|
|
7.
|
Shashank Venkat
|
VI C
|
Why ants move in a line?
|
|
8.
|
Hinal D.
|
VI C
|
Why does our skin discolour when we go out in the Sun?
|
|
9.
|
Aditya Ajith
|
VI C
|
When a space shuttle comes back from space, why doesn’t the ozone layer
burn the space shuttle?
|
Note: Students to answer the questions
and post it in the blog.
Blog: Tell Me Why
Students answering maximum correct
answers will be awarded.
Principal
The answer to 8th question is:
ReplyDeleteThe sun gives out UV Radiations which are harmful for our body. To protect itself, our body secretes a pigment called melanin which gives a darker shade to our skin or tanning
Congratulations dear, you are the first one to respond. Keep answering. Wish you best of luck.
Deletehi Mukhtar,
ReplyDeleteAlthough it is impossible to tell the physical differences between male and female mosquitoes with the naked eye, it is easy enough to find the distinctness when the mosquito is placed under a microscope or magnifying glass.
Male MosquitoSpeaking of Looks
In terms of physical appearance, the mosquito’s proboscis, a long, needle-like antenna that extends from the area of its mouth, is the best indication of the insect’s gender. Male mosquitoes have a feather-like proboscis, while the proboscis of the female mosquito is relatively smooth, not bushy.
Yuvashri BhanuPrakash IX A
hi Siddarth,
ReplyDeleteSurface tension is the energy required to break through the surface or to disrupt a liquid drop and spread the material out as a film. Water has an anomously high surface tension - 7.2 X 10^9 N/m, the highest of any liquid - in large part due to its powerful hydrogen bonding, and as a result water forms spherical droplets because that is the shape that minimizes surface area for any given volume.
an example could be , when an object is placed onto water, it behaves to a certain degree as if it were a sheet of elastic material. This is called surface tension and can be readily observed by placing a piece of grass on water. As water tends to stick to itself, it can be thought of as a sheet - when the density is too great the sheet will "snap" (or sink) but otherwise it can support it (float).
hi Hinal,
ReplyDeleteOne reason would be vitamin D deficiency.Vitamin D is integrally important because it is a group of fat soluble secosteroids. In simple terms, the vitamin can actually synthesize the sun’s rays making it more beneficial to the body rather than being destructive and skin darkening. The vitamin also protects the skin from the sun’s toxic damage and prevents DNA damage through prolonged sun exposure. Nevertheless, some people dread this kind of vitamin because it is basically activated through sun exposure. However, vitamin D sun exposure is not something to fret about. Severe and prolonged sun exposure causes the damages, not the minimal ones. Therefore, sun exposure must be controlled but not definitely prohibited. Skin exposure is still important. Complications may possibly happen if you don’t get enough sun exposure.
Yuvashri Bhanuprakash IX A