When warm air rises, it expands and cools. Cool air can't hold as much water vapor as warm air, so some of the vapor condenses onto tiny pieces of dust that are floating in the air and forms a tiny droplet around each dust particle. When billions of these droplets come together they become a visible cloud.

Trees give us the most needed tool for survival, which is 'Oxygen'. If humans do not save trees today, they might end up buying oxygen in bottles in future. Saving trees will reduce the effect of global warming. Apart from human beings, even birds, animals and other creatures depend on trees for food and shelter. 

Simple ways kids can help save trees:

1. Use paper wisely. We can save trees from being cut down by using less paper. ...
2. Play and create with trash. ...
3. Borrow, share and donate books. ...
4. Plant a tree. ...
5. Visit the forest. ...
6. Stay on the trails. ...
7. Get your Smokey on.

Shudras are the certain caste people who are not allowed to take water from local source

The traditional Indian food is famous world over for its use of multifarious herbs and spices. There are a variety of dishes available in Indian cuisine, and the way of cooking style differs from region to region. India is known for its diverse food recipes that are served at famous Indian restaurants worldwide. Unlike western dishes, Indian recipes are based on ingredients whose flavors don't overlap, for a unique taste that dumbstrucks anyone who tries it for the first time. ... Flavor is a sensory impression the brain registers when our chemical sensors (taste and smell) interact with substances (food).

A tree is a tall plant with a trunk and branches made of wood. Trees can live for many years. The oldest tree ever discovered is approximately 5,000 years old and the oldest tree from the UK is about 1,000. The four main parts of a tree are the roots, the trunk, the branches, and the leaves.

The roots of a tree are usually under the ground. However, this is not always true. The roots of the mangrove tree are often under water. A single tree has many roots. The roots carry nutrients and water from the ground through the trunk and branches to the leaves of the tree. They can also breathe in air. Sometimes, roots are specialized into aerial roots, which can also provide support, as is the case with the banyan tree.

The trunk is the main body of the tree. The trunk is covered with bark which protects it from damage. Branches grow from the trunk. They spread out so that the leaves can get more sunlight.

The leaves of a tree are green most of the time, but they can come in many colors, shapes and sizes. The leaves take in sunlight and use water and food from the roots to make the tree grow, and to reproduce.

There are very many methods of cooking, most of which have been known since antiquity. These include baking, roasting, frying, grilling, barbecuing, smoking, boiling, steaming and braising. A more recent innovation is microwaving. Various methods use differing levels of heat and moisture and vary in cooking time. Steaming works by boiling water continuously, causing it to vaporize into steam; the steam then carries heat to the nearby food, thus cooking the food. The food is kept separate from the boiling water but has direct contact with the steam, resulting in a moist texture to the food.

• Cardamom.
• Clove.
• Cassia bark.
• Black pepper.
• Cumin.
• Coriander.
• Nutmeg and mace.
• Mustard seeds.

Water vapor will condense into droplets depending on the temperature. The temperature at which droplets form is called the dew point. When surface temperature drops, eventually reaching the dew point, atmospheric water vapor condenses to form small droplets on the surface. Clouds form when moist, warm rising air cools and expands in the atmosphere. The water vapor in the air condenses to form tiny water droplets which are the basis of clouds. Condensation is the process by which water vapor in the air is changed into liquid water. Condensation is crucial to the water cycle because it is responsible for the formation of clouds.

The summer monsoon generally begins in April and lasts through late September, while the winter monsoon arrives in October and ends in March. Winter monsoons arrive in October; they are characterized by dry air and cooler temperatures, offering rain-soaked regions a welcome relief from months of endless rains. The summer monsoon and the winter monsoon determine the climate for most of India and Southeast Asia. The summer monsoon is associated with heavy rainfall. It usually happens between April and September. ... The summer monsoon brings a humid climate and torrential rainfall to these areas.

When rainfall is less than normal for several weeks, months, or years, the flow of streams and rivers declines, water levels in lakes and reservoirs fall, and the depth to water in wells increases. If dry weather persists and water-supply problems develop, the dry period can become a drought. Without rain, there wouldn't be living on the surface of the earth. Water is the only solvent of amino-acids, the base of all forms of life. This is why, when seeking extraterrestrial life, we look first for planets that can have liquid water. When some places are in a drought, they may be dry, hot and dusty; cracks may appear in the soil, and rivers, lakes, streams, and other sources of water may go dry. Other places in drought get some rain, but not as much as they usually receive during that season.

Heavy rainfall can lead to numerous hazards, for example: flooding, including risk to human life, damage to buildings and infrastructure, and loss of crops and livestock. landslides, which can threaten human life, disrupt transport and communications, and cause damage to buildings and infrastructure. Too much rain can cause a flood. A flood happens when a lot of water rises and moves onto land. The water can go into houses and other buildings. ... Big storms can quickly cause floods.

There are many sources of fresh water on earth. Sources of fresh water are ice sheets, ice caps, glaciers, icebergs, bogs, ponds, lakes, rivers, streams, and even underground water called groundwater. The sun, which drives the water cycle, heats water in the oceans. Some of it evaporates as vapour into the air. Ice and snow can sublimate directly into water vapour. ... Most precipitation falls back into the oceans or onto land, where, due to gravity, the precipitation flows over the ground as surface runoff.

A flood occurs when a river or stream overflows its banks. ... During a flood, the channel is completely filled and water moves onto the floodplain and slows down. As it slows, it can carry less material. Floods also frequently damage power transmission and sometimes power generation, which then has knock-on effects caused by the loss of power. This includes loss of drinking water treatment and water supply, which may result in loss of drinking water or severe water contamination.

• Flight feathers – Flight feathers help birds to fly. They are found on the wings and the tail.
• Body feathers – Body feathers are colored feathers, which cover the body of the bird.
• Down feathers – Down feathers are soft and fluffy feathers found close to the body of a bird. They help birds to keep their bodies warm.

During exercise, our body may need three or four times your normal cardiac output, because our muscles need more oxygen when you exert yourself. During exercise, our heart typically beats faster so that more blood gets out to your body. When you are exercising, your muscles need extra oxygen—some three times as much as resting muscles. This need means that your heart starts pumping faster, which makes for a quicker pulse. Meanwhile, your lungs are also taking in more air, hence the harder breathing.

Birds have no teeth. They eat with their beaks. Birds eat different types of food.  Some eat fruits, some eat seeds, some eat eggs, while others eat fish.