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Hurricanes
Hurricanes are large, swirling storms. They produce winds of 119 kilometers per hour (74 mph) or higher. That’s...
HOTS | Pollution & Plastics | Why should we not throw plastic bottles into the river?
Water pollution (or aquatic pollution) is the contamination of water bodies, usually as a result of human activities, so that it...
HOTS | Sound | Explosion on Moon -Will it be seen or heard on the earth instantly or after some time
Will it be seen or heard on the earth instantly or after some time ? For more such...
HOTS | Respiration In Organisms | Heart Beats Faster During Exercise Or while Running
Respiration In Organisms – Heart Beats Faster During Exercise Or while Running Q. WHEN YOU RUN, YOUR BREATHING...
HOTS | What do burning Wool and Cotton smell like?
Burning Cotton smells like Burning Paper, whereas burning wool smells like burning hair. Why? Ans. Cotton and paper,...
Taj Mahal turning Yellow – Marble Cancer
The most common culprit for Taj Mahal turning Yellow is iron, which when exposed to water, acids or...
Why do Racing Cars have Flat Tyres?
Have you ever wondered, why the racing cars have flat tyres ? Why are their tyres unique and...
Physical Vs Chemical Changes | Yellowing of Leaves
We often see changes around us and get confused about the change being a Physical or a Chemical...
Why does a Candle Flame point upwards | Combustion & Flame | HOTS |
Think of the candle flame as a #helium-filled balloon: No matter which way you hold the string or...
Why is Time always on X-Axis in a Graph | Time & Motion | HOTS | Class 8
In physics, different quantities are often represented on graphs and very commonly time is represented on the horizontal...
LPG has no smell of its own | LPG is an odourless gas| Fuels | Coal & Petroleum | HOTS
If LPG is an odourless gas, then how do we detect a gas #leakage? Ans. This is not...
2 Thin Woolen Sweaters are warmer than 1 thick one |Heat| Fibre to Fabric
Come winters and all of us like to wrap ourselves with colorful Woolen Sweaters…and as the temperature dips...
Earth vs Venus | HOTS | Class 8 | The Universe
Earth vs Venus – while they are two planets in our solar system, the former is the third...
Why do hanging hoardings and banners have holes? | Winds, Storms & Cyclones | HOTS
You may have seen holes made in huge hoardings and banners. Why are these necessary? Let’s find it...
Why do Electric Wires Sag in Summers?| Heat | Thermal Expansion | Class 7
In the summer, because of thermal expansions, the electric wires sag, and in the winter, due to contraction, they...
Why are electric wires made of Copper & not Silver | Electricity | HOTS
Silver is a precious metal and it is the only metal with a higher electrical conductivity than copper....
| Friction | Holding A Glass With Oil In Your Hands Tends To Slip. Why?
This is the stopping force that opposes the relative movement or the tendency of relative motion of two...
If There Was No Friction, What Would Happen To A Moving Object?
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against...
Why Is Rolling Friction Less Than Sliding Friction?
We can understand sliding friction as the resistance force created between any two bodies when sliding against each...
How Does Rolling Friction Decrease Wear and Tear in Machinery?
When surfaces in contact move relative to each other, the friction between the two surfaces converts kinetic energy...
How To Extract Chlorophyll From Leaves?
Chlorophyll is any of several related green pigments found in the mesosomes of cyanobacteria and in the chloroplasts...
Why Are Microorganisms Are Friends and Foes?
Microorganisms are living organism that is so tiny it can only be seen with the aid of a microscope. Consider...
Why Did Puneet Make A Fungi Special Treat For His Mother?
Fungi is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds,...
Why Are Chips Packets Filled With Nitrogen?
Nitrogen gas is used for packing the packets of chips because it is an inert gas, and it prevents...