What causes lightning?

Lightning may be thought of as a huge spark of electricity. During a thunderstorm, very large electric charges build up insides the clouds and on the ground. The charges build up insides the clouds and on the ground.

The charges build up until a flash of lightning shoots through the air between them. Lightning can flash from the cloud to the ground or between two clouds. Lightning is a sequence of flashes. First a main stroke zigzags to the ground. The main flash then surges upwards. Other flashes may follow in quick succession. When the lightning discharges its electricity to Earth, it tends to strike at a high point, such as a mountain, a tree or a tall building. Lightning flashes produces about 100 million volts of electricity.

How do Magnetic trains work?

Magnetic trains work on the principle of magnetic levitation, which is a way of lifting objects by using the forces that keep magnets apart. This makes the train float above their tracks.

 The magnetic train carries powerful linear motors which push against magnets laid in the special track. The magnets in the track first attract the train, pulling it forward and then, when magnetic fields is reserved. repelling the train and pushing it forward even faster. The train and the track do not touch each other. There are no moving parts, such as wheels and, hence, there is no friction between the train and the track.

Which are the largest and smallest flowering plants?

Chinese Wisteria is the world's largest flowering plant. it can grow branches over 150 metres long and can produce about one and a half million flowers each year.

Bolivian bromeliad ( Puyaraymondii) is another large plant, whose spike reaches a height of ten metres with 8000 flowers on it.

Wolffia punctata, a duckweed, is the smallest flowering plant. It floats on water and forms large floating masses on ponds. It is a very small plant and has one or two disc-like leaves and hanging roots. The smallest plant can measure half a millimetre across.

Which are the longest living animals?

The animals with the longest life span in the whole animals kingdom is the tortoise. Tortoise are known to live for 150-200 years.  

How do snails get their shells?

Snail are soft bodied animals and this makes them vulnerable. They belong to a group known as molluscs, which in Latin means soft. These animals protect themselves by forming a shell made of calcium carbonate, which is extracted from the soil and the food they feed on. Younger snails have smaller, nearly transparent shells that grow larger and stronger as the snail matures.

Do vampire suck blood?

Vampire bats are depicted as huge creatures in horror films. Though, these mammals feed on the blood of other mammals including man, they are very small in sizes, not more than six to nine centimetres in length. The vampire bats are found only in Central and South America. 

They feed at night and suck the blood of horse and cattle. When the prey is fast asleep, it cuts away a small piece of skin with its razor-sharp teeth, usually on the neck or leg of the animal. its saliva contain a chemical that stops the blood from clotting. It when sucks up the blood oozing out from the wound.

Why is hump important for camel?

Also known as the ship of the desert, camels can live without food and water for days together. This is the reason why camels have been used for travelling in desert since times immemorial. Before starting a long journey, a camel takes in large quantities of water and food. the water is stored in water pouches in its stomach, while the food is stored as fat in its hump. It is because of this hump that a camel can survive in the dry and harsh desert. All these days, the camel's body survives on this reserved fat and provides energy to the animal. after a long journey, the hump gets loosened. The camel rests for a long time; has its intake of food and water and sets out for another journey.

How does a Tadpole turn into a Frog

A tadpole turns into a frog after undergoing a series of changes. When it hatches from the egg, in no way does it resemble a frog. It has a small black body, a tail and a pair of gills. For some days, it has no mouth and it attaches itself to a stone or a leaf and survives on the remain of the egg-yolk.

Soon it develops a mouth with horny teeth and starts feeding on vegetation. Gradually, the internal gills develop, the hind and the front legs appear and the tail disappears. The mouth becomes bigger and soon the tadpole changes into a frog.

Which bird can laugh?

The 'Laughing Jackars ' found in Australia and New Zealand can laugh likes humans. Actually, it is not laughing, but its cry sounds like a laugh.Its belongs to the king-fisher family of birds. It feeds on a variety of animals including deadly poisonous snakes. It is 17 inches long. It usually lives near streams. It is a rare species, which is becoming extinct these days. In Australia, the laughing jackars are very valuable, as they eat the poisonous snakes. It is also called kookaburra.

What is a seahorse?

‘Seahorse ’ is actually a fish. Its head looks similiar to the head of a horse. It is found in the sea and comes in various colours and sizes. It is a unique fish because of two features - one, it swims in a vertical position. And another unique features of this fish is that the male seahorse bears the children. The female lays eggs inside the male seahorse and when the children came out, the male seahourse takes them out of his body.

The Stick Insect

The stick insect needs to disguise itself because it can't fly. it also walks very slowly, so it can't get away when an enemy chases it.

Since it makes itself look like a stick, it usually keeps still and avoids being noticed.

The Peppered Moth

The peppered moth looks like a piece of tree bark. Its colour and wing patterns are exactly the same as a tree.

Therefore it can rest comfortably under the noses of its enemies.

Did you know~~~

POLAR BEAR
Polar bear can smell you up to 32 km away.

BEE
A bee has five eyes.

SNAIL
A snail breathes through its foot.

SNAKE
Most snake have six rows of teeth.

FLY
A fly can change direction in 30 milliseconds.

OWL
Owl have no teeth.

SHARK
When baby sharks are born, they quickly swim away from their mothers. This is because their mothers might see them as prey and eat them.

After We Are Born...♥

In the beginning, we only know how to cry when we are hungry and sick. Then we learn to talk, sit, crawl and stand. After learning to stand we learn to walk. When we can walk, we learn to run without fear of falling. As we grow bigger, we start school and get to make friends.♥

☼When the Earth gets warmer☼

Human activities result in the emission of greenhouse gases and carbon dioxide into the atmosphere. the high concentration of trapped greenhouse gases together with infra-red (radiation) will result in an increase in global temperature.

Global warming will result in the increase of humidity in the air causing heavy rainfalls and flood. This is a common and recent phenomenon in the tropics. Global warming causes frequent flooding as well as long period of drought.

A heatwave is a period of unusually hot weather. As the Earth gets warmer, we will experience frequent heatwaves. In 2003, 35,000 people in Europe died in the heatwaves. Global warming also causes the ice caps in the polar regions to melt faster. The continuous melting of the ice caps is bad news for the polar bears in the North Pole. They have to swim long distances to reach one iceberg from another.  Countries will low-lying land mass will have to evacuate their population to higher ground when the sea level rises.

Global warming will bring about an imbalance in the ecological system. A short winter will increase the population of the pine beetles which in turn will result in more pine trees being destroyed by the beetles. 

A change in global weather will threaten the existence of most animals on Earth, some to the point of extinction. Besides coping with the change in temperature, animals and humans will be fighting for their own territory when the land mass becomes smaller as the sea level rises.

http://www.mindingthecampus.com/originals/2011/09/global_warming_the_campus_non-.html