Too busy to read? Watch on YouTube Are ants and termites the same thing? No. They belong to different insect orders. Termites are from the Isoptera order and ants are from the Hymenoptera order. Termites and ants are easily confused and they have a lot of similarities, but they have a lot of differences as […]
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Watch this on YouTube Is Earth an open or closed system? It is both. For some things it is open and for others, it is closed. Earth is an open system for energy. Most of the energy on Earth comes from the sun. Energy enters Earth from outer space as well, but the sun is
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Watch on YouTube Why were the Terracotta Warriors buried? They were buried to protect Qin Shi Huang, the first emperor of China, in the afterlife. Qin Shi Huang was a very influential ruler of China. He was the first emperor of a unified China and a lot of things were begun in his reign. He
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Watch on YouTube Why is Broadway so long? Before it became a road it was originally the Wickquasgeck trail. Broadway is a street that runs through Manhattan. It is famous for having many of New York’s theaters on it. It is actually much longer than people think and stretches for 53.2 km. It starts at
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Watch on YouTube How do facial expressions work? There are 20 muscles in the face that can be moved in different combinations. There are two kinds of facial expressions: voluntary and involuntary. A lot of study has gone into reading facial expressions and there are many theories about whether they reveal inner thinking or not.
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Watch on YouTube Are Inner and Outer Mongolia separate countries? Outer Mongolia is the country of Mongolia and Inner Mongolia is a part of China. Outer Mongolia is known as Mongolia and has an official language of Mongolian, although many people also speak Russian. It has a population of a little over 3 million people
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Watch on YouTube How was the meter (metre) defined? In 1791 it was defined as one ten-millionth of the distance from the equator to the North Pole. The word “meter” comes from Greek and means “to measure” or “to count.” That’s why the “meter” in speedometer and altimeter doesn’t mean the unit of distance. The
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Watch on YouTube Why is the Grand Canyon so deep? Because of the power of the Colorado River, the amount of water in it, the arid climate, and the rocks it is made of. The Grand Canyon carves through the Colorado Plateau. It is 446 km long, 29 km wide, and 1,857 m deep at
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Watch on YouTube What will happen at the end of the universe? There will either be a Big Crunch, a Big Bounce, a Big Rip, or a Big Freeze. The universe is thought to be 13.7 billion years old. This has been calculated in two ways. The first way is to find the oldest stars
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Watch on YouTube Why does blood show up under UV light? Because it absorbs all of the light and appears completely black. When we watch crime movies, the police often use a black light to show stains at the murder scene. Well, a black light will make many bodily fluids glow, but it won’t make
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