Kids Science Questions

Kids Science questions, these are some of the most common questions asked by kids.

Questions: Answers:
What makes it Thunder? Why does it Thunder? When you see a flash of lightning in the sky, it is often followed by a crashing boom of thunder. This is because when lightning moves through the sky, it heats up the air to thousands of degrees centigrade – that’s hotter than the surface of the Sun. The heated-up air rushes away into the cooler air surrounding it. This moving air makes a loud bang, and that is what we call thunder. Stuart Umbo, Science Museum
Why is the Sea Blue? What makes the sea or ocean blue? because of the different wavelengths of light. Blue or purple being the longest. The deeper the water, the deeper blue in colour it is. When you have water that sometimes looks green, you notice that the water is shallow, and the ‘green’ you see is when light is reflecting off of the sandy bottom. The distance is shorter, so you have a somewhat different wavelength of light.
Why is the Sea Salty? What makes the Sea Salty? The sea is salty because the rivers that flow into it wash salts and other minerals out of the ground. These dissolve in the rivers and the rivers then flow into the sea. Another source of salt is the sea bed. As the Sun evaporates the water from the sea to make clouds, it leaves the salts and minerals behind, so the sea is much saltier than rivers and lakes. Even though it rains on the sea as on land, this isn’t enough to dilute the salt. Roger Highfield, Editor, New Scientist
Why is the Sky Blue? What makes the sky blue? Why is it not red, pink, or green? Sunlight is a mixture of all the colours of the rainbow. As it travels from the Sun to the Earth, it has to travel through the air in our atmosphere. Some of the sunlight hits particles (tiny bits that make up the air) and bounce off in all sorts of directions. The blue part of sunlight bounces more easily than the other colours and gets scattered all over the sky. That’s why when we look up, our eyes can see blue light coming towards us from every direction, making the whole sky look blue. Dr Marek Kukula, Royal Observatory

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