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KINDS OF MICROBES  There are four kind of microbes. Bacteria Virus Protozoa 4. Fungi 1. Bacteria They are single celled organisms and have different shapes. They may be rod-shaped,spiral or round. Bacteria cause diseases like Tuberculosis, Typhoid, Pneumonia, etc. 2. VIRUS Viruses are very minute organisms, even smaller then bacteria. They cause diseases like Influenza, Polio, AIDS, etc. They enter the cells and increase in number inside the cell. 3. Protozoa Protozoa are single celled microorganisms. Most of the  protozoa are harmless but some can cause diseases like Malaria, Dysentery, kala-azar,etc. 4. Fungi Fungi are organisms which grow on decaying matter and cause skin diseases like Ring worm, Athlete's foot, etc. Useful microbes There are some microbes which are useful to us. They help us in many ways. Some bacteria changes milk to curd, some help us in making cheese. Some fungi help in baking bread and making wines. Some bacteria help in the de...

TEETH CARE Brush your teeth at least twice a day. Once in the morning and once in the evening. Brush your teeth by following the correct method as shown in the video. Wash your mouth after every meal. It is good to brush your teeth after every meal. Avoid eating too many sweets and chocolates, because germs love sugar. The longer the sugar stays in the our mouth, the more damage it will cause. Floss your teeth. Flossing helps to remove the food particles stuck between the teeth. A dental floss is a piece of string that is moved back and forth through the spaces between the teeth. Do not keep munching snacks all day long as they stick to your teeth and cause decay. Well balanced diet should be taken to give more strength to your teeth. Don't eat too hot or too cold. After eating citrus fruits(like oranges) or juices, rinse your mouth with water, as the acids present in them can weaken the enamel. Visit dentist, if there is a problem.

Cavities And Tooth Decay Tooth decay occurs more commonly in children than adults. Whenever we eat anything, small pieces of food are left sticking to our teeth. If the teeth are not brushed regularly and properly, the leftover food particles in the mouth give rise to bacteria. These Bacteria are present in the plaque that is a soft substance and develops naturally on our teeth and they produce acid that destroy the enamel,  the protective layer of our teeth. Thus, our teeth start decaying. It also causes holes or cavities in the teeth and produces bad smell and toothache. When the tooth is badly damaged it begins to shake. The gums cannot hold it tightly and it may fall. Thus tooth decay causes: 1. Holes or cavities in the teeth. 2. Foul smell from the mouth. 3. Losing the teeth. 4. Stomach troubles or other diseases.

Teeth Teeth are very important part of our body. They help us to eat food and speak clearly. There are many words which we cannot speak without teeth. You may feel difficulty to understand many words spoken by an old man without teeth. Teeth also give shape to our face also. A baby is born without teeth. Teeth begins to grow only after a baby is few months old. By the time a child is 2-3 years old,it has 20 teeth. These are also known as milk teeth or temporary teeth. At the age of six, the milk teeth starts falling off. New teeth grow in their place. The new set of teeth is called permanent teeth. All the permanent teeth grow by the age of 12 to 13. Generally, there are 28 permanent teeth. Four more teeth is called wisdom teeth come out between the age of 20 to 25 therefore, every adult has a set of 32 permanent teeth, 16 in the upper jaw and 16 in the lower jaw. Structure of teeth Structure of tooth A tooth is fixed to the gum by its root. The portion of tooth seen above t...

Small experiments Small experiments that will amaze you.

Reason for cataract Most cataracts develop when aging or injury changes the tissue that makes up your eye's lens. Some inherited genetic disorders that cause other health problems can increase your risk of cataracts. Cataracts can also be caused by other eye conditions, past eye surgery or medical conditions such as diabetes. First sign of cataract Light sensitivity is a common symptom of cataracts. The glare of bright lights can be painful, especially to those with posterior subcapsular cataracts, according to the Mayo Clinic. These types of cataracts start at the back of the lens, blocking the path of light and often interfere with your reading vision. Remedies 1. Improve the lighting in your home with more lighting and brighter lamps. 2. Limit your night driving. 3. When you go outside in daytime, wear sunglasses or a broad-brimmed hat to reduce glare. 4. Avoid sunlamps and tanning booths. 5. Get your eyes checked once a year (more often, if you've noticed ...

Reason for long sightedness Long sight can occur at any age but it tends to become more noticeable above the age of 40 years. In rare cases, long sight is caused by other conditions such as diabetes, small eye syndrome (microphthalmia), cancers around the eye and problems with the blood vessels in the retina. Remedies : 1. Warm your eyes. Rub your palms together to create heat, and then place them against your eyes for five seconds. 2. Roll your eyes. 3. Focus. 4. Massage your temples. 5. Take a mini-nap.

Reason for short sightedness Short-sightedness usually occurs when the eyes grow slightly too long. This means that light doesn't focus on the light-sensitive tissue (retina) at the back of the eye properly. Instead, the light rays focus just in front of the retina, resulting in distant objects appearing blurred. Remedies : 1. Deep-Water Fish. Salmon, tuna, and mackerel are great sources of omega-3 fatty acids. 2. Leafy Green Vegetables. 3. Eggs and Carrots. 4. Berries and Citrus Fruits. 5. Nuts. 6. Beef.

DIFFERENT TYPES OF WEATHER Types of weather include sunny, cloudy, rainy, windy, and snowy. One of the most significant factors that affects weather is air masses. Air masses cause warm, cold, stationary, and occluded fronts. Hot and sunny days : On a sunny day, the sun shines brightly. The weather is hot. We wear light cotton clothes to keep our body cool. We drink a lot of water. April, may and June are the hot months of the year. This season is called summer. Cold days When the sun doesn't shine brightly, we feel cold. We wear woollen clothes to keep us warm. we want to drink hot drinks. December, January and February are the cold months of the year. This season is called spring. Rainy days When the sky is not clear and it starts raining, it is called a rainy day. It is also called monsoon. After the rain stops sometimes we can see a rainbow in the sky. June, July and August are the rainy months of the year. This season is called winter. Wi...

WATER Water is a transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's streams, lakes, and oceans, and the fluids of most living organisms. It is vital for all known forms of life, even though it provides no calories or organic nutrients.

THE AIR The air you breathe is made up of lots of other things besides oxygen! Oxygen only makes up about 21% of air. About 78% of the air you breathe is made up of another gas called nitrogen. There are also tiny amounts of other gases like argon, carbon dioxide and methane.

MAN-MADE THINGS : Non-living things, like pencils, buses, houses and clothes are made by man. The things made by man are called man-made things. Examples : 

Natural Things :   Some non living things, such as mountains, water, wood and rocks are found in nature. These are not made by man. These are called natural things. Examples :

Definition of non living things : A non living thing as the name suggests is anything that is not living or has no life and so can not perform any function of a living thing. Examples :

The 7 Characteristics of Living Things 1. Movement. All living things move in some way. 2. Respiration. Respiration is a chemical reaction that happens within cells to release energy from food. 3. Sensitivity. The ability to detect changes in the surrounding environment. 4. Growth. 5. Reproduction. 6. Excretion. 7. Nutrition. Examples : Animals, birds, human beings, trees, insects etc...