Each layer differs in feel (texture) colour, depth and chemical composition. These layers are referred to as horizons. The uppermost horizon is generally dark in colour as it is rich in humus and minerals. The humus makes the soil fertile and provides nutrients to growing plants. This layer is generally soft, porous and can retain …
A vertical section through different layers of the soil is called the soil profile.
The soil is formed by the breaking down of rocks by the action of wind, water and climate.This process is called weathering. T
The rotting dead matter in the soil is called humus.
If a storm is accompanied by lightning, we must take the following precautions:-1 Do not take shelter under an isolated tree. If you are in a forest take shelter under a small tree. Do not lie on the ground.2 Do not take shelter under an umbrella with a metallic end.3 Do not sit near a …
Thunderstorms develop in hot, humid tropical areas like India very frequently. The rising temperatures produce strongupward rising winds. These winds carry water droplets upwards, where they freeze, and fall down again. The swift movement of the falling water droplets along with the rising air create lightning and sound. It is this event that we call …
Before cloud formation, water takes up heat from the atmosphere to change into vapour. When water vapour changesback to liquid form as raindrops, this heat is released to the atmosphere. The heat released to the atmosphere warmsthe air around. The air tends to rise and a drop in pressure. More air rushes to the centre …
: In our country they are not very frequent. A tornado is a dark funnel shaped cloud that reaches from the sky to the ground. Most of the tornadoes are weak. A violent tornado can travel at speeds of about 300 km/h. Tornadoes may form within cyclones.
1 Do not drink water that could be contaminated. Always store drinking water for emergencies.2 Do not touch wet switches and fallen power lines.3 Do not go out just for the sake of fun.4 Do not pressurise the rescue force by making undue demands.5 Cooperate and help your neighbours and friends.
Thunderstorms develop in hot, humid tropical areas like India very frequently.The rising temperatures produce strong upward rising winds. These winds carry water droplets upwards, where theyfreeze, and fall down again. The swift movement of the falling water droplets along with the rising air create lightningand sound. It is this event that we call a thunderstorm.
