WHAT ARE RENEWABLE ENERGY SOURCES?
How do you keep cool in your house? What sort of light do you use at night? What appliances do you have in your home? Anything that gives you heat or light uses energy. Household appliances use energy. In your…
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Renewable and Nonrenewable Energy Resources
The world is full of movement.Trees move in the wind.Aircraft fly in the air.Ships sail on the sea.People and animals move around.None of these things can move without energy. Living things and machines need energy in order to work. Where…
Who invented the airplane?
Who invented the airplane? The thought of flying like a bird, is among the oldest of human dreams. One of the most famous legends of the ancient Greeks, talks about Icarus, who glued wings with wax to himself and soared…
WHO INVENTED THE PARACHUTE?
Have you ever wondered who invented the parachute? Imagine if you find yourself into an empty space at the height of 4-5 miles above the Earth, and yet you have landed on the ground as if you jumped from fence…
History of Helicopters – Who Made the First Helicopter?
People for long time have dreamed of a flying machine that could rise from the ground right up. Leonardo Da Vinci around year 1500, made a drawing of giant helicopter, which looked like a screw. Leonardo never attempted to make…
How to Make a Pinwheel – Art Projects For Kids
On a square sheet of paper cut from the corners four straight-line incisions. Fold toward the middle every second end, and pierce all four tops with needle trough the center of the sheet. How to Make a Pinwheel: Attach the…
How to Make a Paper Ball – Art projects for kids
The paper ball is very interesting project consisting of three circles of paper A, B and C.The three parts should be inserted appropriately one into another in order to make the ball.You can draw the circles by yourself or you…
How to Make a Paper Banger – Art projects for kids
To make this harmless and loud toy – the Paper Banger, we need strong sheet of paper size 6,3 x 9,5 inches (16 x 24 cm) (or other sheet of paper with edge ratio 2:3). How to make paper bangers?…
How to make a paper cup that holds water – Easy steps to make paper cup
It is very easy to make a Paper Cup and use it as a drinking cup, in cases when we are forced to drink water with our hands. All we need is a clean sheet of paper with dimension 20…
What is Heliograph – Communicating by light
A heliograph can be seen up to 30 miles (48 kilometers) away on a clear day without a telescope. The modern heliograph is mounted on a tripod, like a camera.