Showing posts with the label
science question
50 amazing science and technology facts about mobile phones or smartphones: The first mobile phone call was made on April 3, 1973, by Martin Cooper. Mobile phones use radio waves to communicate with …
1. How much skin do we have? 2. Do fish go to sleep? 3. Who was first person in space? 4. Were Dinosaurs vegetarian? 6. How many eggs does a woman have? 7. What is blood? 8. Is the food d…
An adult has more than 2 square metres (20 square feet) of skin. This is almost the size of a bed sheet!
Some fish enjoy a nap.All members of the parrotfish family sleep at night. They make a bed out of their own saliva that covers them fully. Then they go to sleep on the sea floor. But most other type…
On 12 April 1961, Russian cosmonaut Yuri Gagarin was the first person to travel in space, aboard the spacecraft Vostok 1.Gagarin orbited the Earth once on this historic flight, which lasted 1 hour an…
Before it was formed, the Sun and the rest of the solar system was a huge mass of hot gas and dust called a solar nebula. This nebula spun faster and faster until the clouds of gases, dust and ice p…
There are at least 100 billion galaxies that we know of. This number keeps growing as better telescopes are developed and we see more and more galaxies. On top of that, the galaxies are moving away f…
Despite their reputation as violent monsters, 65 per cent of the dinosaurs were vegetarian. They lived around the same time as the first flowering plants were developing on the Earth. But most of the…
The ovaries hold thousands of eggs. These are released once a month for about 30 years during menstruation. When a woman is between 45–50, menstruation..
Blood is sometimes called ‘the river of life’ and it accounts for about eight per cent of our weight. Blood contains two types of blood cells. Red blood cells give blood its colour and also help....�…
The stomach walls churn and break the food into tinier pieces. The acid in the stomach kills harmful bacteria, while other chemicals speed up digestion. Water, sugar and salt are..
Mendeleev's Periodic table simplified the study of elements. As the arrangements of elements showing similar properties were classified into groups, it was very useful in studying and rememberin…
A : Artificial satellites are given a definite path around the Earth. The Earth’s gravity holds the satellite in a path called an orbit. There are several kinds of orbits. One is Leo or Low Earth Orb…
A : An object tends to carry on doing the same thing, whether it is at rest or moving,unless a force acts on it to change that. This is called inertia. Your pencil box lies on the table until you pus…
A : Galileo Galilei was an Italian astronomer and physicist who supported the theories of Copernicus. He improved the telescope and made so many new observations about the planets that he has been de…
A : A solar eclipse occurs when the Moon comes between the Sun and the Earth,blocking the Sun from our view. In a total solar eclipse, the Moon blocks out the Sun from our view completely. In a parti…
A : Black holes are extremely compact space objects that were once massive stars. Sometimes a huge star begins to shrink until it is smaller than an atom. This is called a black hole. The centre of t…
A : Male reproductive organs are outside the body. They include the penis, and a pair of testes inside a cover called a scrotum. The testes produce sperm and the male hormone testosterone. During sex…
A : The brain is an organ inside the skull.It forms only about two per cent of our body weight, but it controls our feelings, movement, skills and every function necessary to live. The human brain is…
A: The heart has four chambers,two on each side, one above the other.The two top chambers are called the left atrium and right atrium.The two lower chambers are the left and right ventricles.A wall o…