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The law of floatation states that "a floating body displaces liquid equal to is weight". Hydrometer is a device based on this law.  It is used to measure the density of a .....

Pascal's law states that "the pressure exerted on a liquid enclosed in a vessel is spread equally by the liquid in all the directions". Hydraulic press is a device based on Pascal's .....

Buffaloes (Plural form of buffalo) are the large animals of cattle family.  They have long and curved horns. They are useful in many ways. Like: - They provide milk which consists of high nutrition.  - They are used as meat. - Their .....

Vibration occurs in the two sides (of leather) of the Madal where we hit by our .....

नाम पाँच प्रकारका हुन्छन् .....

Carpel (or pistil) consists of three parts namely stigma, style and ovary. The stigma is situated at the top and the ovary is situated at the base. The style is a tube like structure which connects stigma and ovary. Ovules can be seen in the .....

Stamen consists of anther and filament.   Anther is the top part of a stamen that produces pollen grains. Filament is the long, thin stalk of a stamen. Stamens of flowers can be free or connected to the petals. The function of androecium is .....

You know that energy is the ability to do work or cause certain change. When you stretch a rubber band and aim at your friend's face, your friend's face will get hurt when the rubber is released. This is because a stretched rubber band .....

You know that energy is the ability to do work. With energy, things can do work. You may have played bowling. The bowling ball only knocks over the pins because of certain energy in its movement. This energy is kinetic energy. So, kinetic .....

The energy sources like fossil fuels such as coal, petroleum products, oil, natural gas exists in limited supply and cannot be replaced if it is used up. So, these energy sources are called non-renewable. If these energy sources are not utilized .....

Energy neither can be created nor destroyed but it can be changed from one form to another form. It is the principle of conservation of energy. Let's take an example of a candle. Candle already has chemical energy in it. No one created the .....

You know a burning matchstick. Here, chemical energy gets changed into heat and light energy. The process occuring here is the change of form of energy. Thus, the process of change of energy from one form to another form is called the .....

You may know a magnet. When a magnet is kept near an iron nail, it comes towads the magnet. The energy with which the magnet attracts the iron nail (magnetic substance) is called magnetic energy. So, we can define magnetic energy as the energy .....

So, sound energy is a form of energy that is associated with vibrations of molecules of matter. It is a type of mechanical wave which means it requires an object (like air and water) to travel through. Sound originates from the vibrations that .....

Here, chemical energy is stored in the chemical bonds of atoms and molecules inside the battery. And it is released when connected to the circuit. Therefore chemical energy is defined as the energy that is released in a chemical reaction (like; .....

Light is a form of energy which makes things visible. During day time, There is the sun in the sky. We can see things around us due to the presence of light. Light makes things visible. At night, There is no sun in the sky. We cannot see .....

When we go near fire we feel warm. Fire has certain energy. The energy that made  us feel warm when we went near energy source(fire); is heat energy. Thus, heat is the form of energy which gives us sensation of .....

The energy, which is produced due to  motion or position of a body, is called mechanical energy. You know that the water in a river is in continuous motion. The water always changes its position from one place to another. The water possesses .....

Energy is the capacity to do work.  For any work, we need energy. There are different forms of energy such as mechanical energy, heat energy, light energy, electrical energy, sound energy, chemical energy, nuclear energy and magnetic energy. .....

The major sources of electrical energy are hydropower, solar plant, windmill, thermal plant, nuclear power plant, geothermal plant, and so on.  The main source of electricity for our country is hydropower and solar .....

Insulator is the substance which does not pass heat and/or electricity through it.  It is also called .....

Men kill wild animals for entertainment on hunting or for the meat or body parts of the animals.  The body parts of most of the wild animals are precious and expensive. That might be a major cause of .....

Lamina is the expanded portion or blade of a leaf which is a specialized ground for photosynthesis. The stomata, veins, margin, and apex; all are the parts of the lamina. The leaf blade or the lamina is thin and broad for the .....

Mid-rib is the central large route for the circulation of water, minerals and prepared food in a leaf.  It runs from the petiole to the tip of the leaf. Veins arise from the mid-rib and spread throughout the leaf. The mid-rib also supports .....

Veins are the small routes in the leaves through which water and minerals and prepared food circulate.  The arrangement of veins in a leaf is called venation. Monocot leaves have parallel venation while dicot leaves have reticulate .....

A dicot leaf has a petiole but a monocot leaf does not have the petiole. The leaf containing petiole is called petiolate leaf while the leaf without petiole is called sessile leaf. Petiole gives support and attachment to the leaves. It gives path .....

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You know that fruits are the plant structure having sweet, edible portions and generally consumed raw.  Fruits may be fleshy or dry. They surround the seeds of a flowering plant. The functions of fruits are: - Fruits protect the seed during .....

When the pollen grains from anther of stamen of a flower is transferred by wind, water, or animals to the stigma of carpel (or pistil) of another flower, pollination process takes place. The picture below shows the pollination by .....

Seed Seed is a part of reproduction. A seed of a plant grows and develops into a new .....

Flower is the reproductive part of a flowering plant.  (It is the most attractive part of the plant. It carries out the process of pollination and fertilization. A complete flower has four whorls - calyx, corolla, androecium and gynoecium. .....

Pollination is the process in which pollen grain is transferred from male reproductive orgam (anther) to female reproductive organ .....

Angiosperm is a group of flowering plants having seeds with seed-coats.  All the monocot and dicot plants are angiosperms.  Most of the angiosperms have fruits in which the seeds are enclosed.  They are the most developped plants .....

Gymnosperm is a group of flowering plants having naked seeds.  e.g. Pine, Cycas, .....

Calyx is the outermost whorl of a flower. It is composed of sepals which are mostly green in colour. It covers the flower during the bud stage and protects the inner parts. It has no significant role in the flower after .....

Corolla is the second outermost whorl of a flower. It is a group of petals which are colourful and attractive. It is the most attractive part of the flower. It attracts the insects that help in .....

Pistil is the female reproductive part of a flower.  (It lies at the central part of the flower. It consists of ovary, style and stigma. The pollen grains from the anther of stamen reach the stigma of the pistil during pollination. The pollen .....

Stamen is the male reproductive part of a flower.  Its group is called androecium.  A stamen consists of a filament and an anther.  Anther is the box-like structure at the tip of the stamen.  The anther contains the pollen .....

Chlorophyll is the green pigment found in the leaves of plants that helps in photosynthesis.  (Photosynthesis uses chlorophyll to capture and convert energy. Chlorophyll is the green pigment found in almost all types of plants. .....

The differences between monocotyledonous and dicotyledonous plants are given below: Monocotyledonous plants Dicotyledonous plants 1. Monocotyledonous plants have only one cotyledon in the seed. 1.Dicotyledonous plants .....

Petal is the second outermost whorl of a flower.  Its group is called corolla.  It is colourful and attractive and may have pleasent smell.  It attracts the insects that help in .....

The functions of skeleton are:  It makes up the framework of the body.  It gives support and mechanical strength to the body.  It gives the place for attachment for the muscles.  Bone marrows inside the bones of the skeleton .....

If you want to know about something that you don't know or want to have knowledge on the specific subject, then what means do you use to have information? These all can be possible only with the help of internet.  Not only that we can .....

Aayush, the advantages of internet are may. We can use it to learn the ideas and concepts. It can be used in hospital while carrying our operations. It can be used in the hotels for booking the hotel and making orders. It can also be used in .....

Aayush, let's explore Ants! There are more than 12,000 species of ants all over the world. They have the ability to carry between 10 and 50 times their own body weight.  Ants don’t have ears. Ants "hear" by feeling .....

Mount Fuji is the tallest mountain in the Japan standing at 3,776 meters (12,380 feet). Mount Fuji is an active volcano, which most recently erupted in 1707.  It stands on the border between Yamanashi and Shizuoka.  Mount Fuji lies .....

The mountain is the part of Kilimanjaro National park and it is a major climbing .....

What Loch Ness really is? Loch Ness is a large, deep, freshwater loch in the Scottish Highlands and is one of the most visited locations in Scotland. In fact, it is the most famous lake in the world, the .....