Can a star crash into Earth? Astronomers say that if a stellar collision happens within 100 light years of the Earth, the resulting gamma-ray burst could possibly destroy all life on Earth. This is still very unlikely though because there are no stellar clusters this close to the Solar System. Do objects lose momentum in […]
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What happens when you put a straw in a glass of water? When you add the water to the glass, the straw appears to bend, but once you remove the straw you see it isn’t really bent at all. This is because the straw is not bending, but the light around the straw is bending […]
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Does the moon generate its own light? Unlike a lamp or our sun, the moon doesn’t produce its own light. Moonlight is actually sunlight that shines on the moon and bounces off. What gives the moon its light? The Moon gets its light from the Sun. In the same way that the Sun illuminates Earth, […]
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Does the size of the salt particles affect the rate of solubility? Size of the particles — When a solute dissolves, the action takes place only at the surface of each particle. When the total surface area of the solute particles is increased, the solute dissolves more rapidly. Breaking a solute into smaller pieces increases […]
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Do gamma rays have more energy than visible light? Gamma-rays are the most energetic form of electromagnetic radiation, with over 10,000 times more energy than visible light photons. If you could see Gamma-rays, the night sky would look strange and unfamiliar. The familiar sights of constantly shining stars and galaxies would be replaced by something […]
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How does Urbanisation affect the water cycle? “The increase in impervious or hard surfaces, including rooftops and pavement, decreases the amount of water that soaks into the ground, or infiltrates. This increases the amount of surface runoff.” notice many visible changes, includ- ing housing developments, road networks, expansion of services, and more. How does urbanization […]
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What is rapid urbanization? Urbanization is not merely a modern phenomenon, but a rapid and historic transformation of human social roots on a global scale, whereby predominantly rural culture is being rapidly replaced by predominantly urban culture. Where is rapid Urbanisation currently happening? Since 1950 the most rapid growth in urbanisation has occurred in LEDCs […]
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