Why are deserts cold at night? Deserts get so cold at night because sand doesn’t retain heat, the air is very dry, there is no cloud cover, and deserts are not usually close to any large bodies of water. Deserts are obviously famous for being extremely hot and if you are lost in a desert, […]
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Why do Monarch butterflies migrate so far? Monarch butterflies migrate for thousands of kilometers because they can’t survive the cold winters. We know that many species of birds navigate when the weather gets too cold. We are familiar with seeing different bird species in the summer and the winter where we live and we know
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Why are there so many camels in Australia? There are so many camels in Australia because they were shipped over to make exploring the interior and laying telegraph lines easier. When you think of camels, you probably think of hot African desert countries, probably around the Sahara Desert. Well, you are not wrong. The country
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What is a supervolcano? A supervolcano is a volcano that has had an eruption, or has the potential of an eruption, that is an 8 on the volcanic explosive index. We have scales to measure the size of hurricanes, the strength of earthquakes, and many other things. Well, there is a scale to measure the
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Why can warm air carry more moisture? Warm air can carry more moisture because more water evaporates when the air is warm and there is more space between the water molecules to hold that moisture. Saying that warm air “holds” more water is a little bit inaccurate because the air doesn’t actually hold the water.
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Why are the White Cliffs of Dover white? The White Cliffs of Dover are white because they are made of white chalk, which is a type of limestone. The White Cliffs of Dover are a very famous symbol of the UK. During the Second World War they were often sung about because when pilots crossed
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Is category 5 the strongest a hurricane can be? A category 6 hurricane is possible, but not with the current method of measuring hurricanes. The hurricane category system is called the Saffir-Simpson Hurricane Scale. As the name suggests, it was invented by two people called Saffir and Simpson. Herbert Saffir was a civil engineer and
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How did the Great Lakes form? They were dug out of the ground by glaciers and ice sheets, and then filled with water from melting ice. It is difficult to imagine how big the Great Lakes are. We see them on maps, but we don’t get a sense of how vast they are. Together, they
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What shape is the Earth? The Earth is not a perfect sphere, it is an irregularly shaped ellipsoid. Another word for ellipsoid that is often used is oblate spheroid. An ellipsoid, or an oblate spheroid, is a sphere that is slightly wider along one of its axes than another. If you are blowing glass and
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What is fool’s gold? It is most commonly pyrite, which has a similar appearance to gold. The expression “fool’s gold” came into existence in the 1820s. The knowledge that there were other metals that looked like gold has probably been around for centuries, but it was only in the 1820s that gold rushes became a
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