The human brain is a very powerful organ. It controls all parts of the body andallows you to think, feel, move your arms and legs and it helps you stay healthy. The brain looks like a pink sponge and consists of a mass of nerve cells. It isprotected by the skull. An adult’s brain weighs about 1.5 kilograms. Main Parts of the Brain Cerebrum The […]
Mushrooms are small living organisms that look like umbrellas. They are not plants because they do not have chlorophyll, the green material that plants use to make food. Mushrooms get their food from the living or dead plants around them. The 3,000 types of mushrooms around the world belong to the group of fungi. Parts of a mushroom A […]
Tea is one of the most popular drinks in the world. You make it by pouring hot water over the dried leaves of a tea plant. For centuries people believed that teas could cure illnesses, they used it as medicine. Today scientists know that tea contains chemicals that prevent cells from dying. Most teas have caffeine in them, a substance that makes you feel more active. Some people have problems drinking tea because it can cause sleeplessness. […]
Teeth are hard, bony structures that grow from the jawbone. Humans and other animals use their teeth to bite and chew food. Unlike your brain, your teeth were not ready to work from the day you were born.Although babies start growing their first teeth before they are born, you can’t see them until they are about 6 to 12 months old. Humans grow […]
Rice is one of the world’s most important food crops . It is a grain, like wheat and corn. Almost all the people who depend on rice for their food live in Asia. Young rice plants are bright green. After planting, the grain is ripe about 120 to 180 days later. It turns golden yellow during the time of harvest . In some tropical countries rice can […]
When the sun rises on a warm and sunny day you can see the trumpet-shapedflowers of the morning glory open up. When they close late in the afternoonprimrose flowers open and before daylight arrives the next morning they close again. Biological rhythms, like the opening and closing of flowers happen all over nature. But not all of them are daily rhythms. Some, like the beating […]
In organic farming, crops, meat and other food are produced without chemicals.Fertilizers, pesticides, growth hormones and antibiotics are forbidden. During thousands of years of civilization the raising of animals and growing of plants have always been organic. Chemicals for farming first came up at the turn of the 20th century. Widespreaduse of chemicals began after World War II. In the 1950s and 60s farmers started using chemical fertilizers and pesticides.Recently, however, […]
The shark is a meat-eating fish and one of the most feared animals in the sea. There are over 300 types of sharks that live in oceans all over the world. Most of them live in warm seas but some sharks prefer colder regions like the seas around Antarctica. The first sharks lived in our oceans about 300 million years ago. […]
A coral is a structure made from millions of very small sea animals, called polyps. A single tube -shaped polyp is only an inch in length . At one end its mouth issurrounded by tentacles that bring sea animals toward it. Corals are very colorful and grow in many different sizes and shapes . They have a skeleton that is outside or inside its body. They can be […]
Cotton is a plant that produces fibers , which are used to make clothes and other products, like towels , carpets or sheets . Clothes made out of cotton areespecially light and comfortable . What Cotton is Used For Every part of the cotton plant can be used. The long cotton fibers are used to make cloth , the short fibers can be used in the paper industry. You can […]