How do glaciers move? Glaciers move because they are pulled downhill by gravity. A glacier is a river of ice that is flowing downhill. A river is a body of water that flows from a high elevation to a low elevation, usually ending in the sea or a lake, under the force of gravity. A […]
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What are the four fundamental forces? The strong force, the weak force, gravity, and the electromagnetic force. The four forces are the fundamental forces that govern everything in the universe. They are fundamental because they cannot be broken down into simpler parts and they are the reason behind all of the laws of physics. Gravity
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Why do some things bounce and other things don’t? Things that bounce have more elasticity than things that don’t bounce. For something to bounce, it has to has to have kinetic energy. It then has to transfer this kinetic energy to internal energy and then back to kinetic energy without losing any energy in the
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How does a canal lock work? By using gravity to increase the amount of water in the canal and rise the boat. There are two different reasons why canals need locks. The first is that canals are bodies of running water and so they have an upstream and a downstream, giving them a current. They
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How do parrots talk? They can imitate human speech by passing air across the opening of their trachea using an organ called a syrinx. Parrots don’t talk in the wild. And when we say “talk”, they mimic human speech without necessarily understanding what they are saying. Some parrots have been taught to learn the names
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What was the Royal African Company? It was a British slaving company that ties the British royal family to the slave trade. Britain started kidnapping African people as slaves in 1562. It didn’t start out as a national policy, but it quickly became one. John Hawkins is credited as being the “pioneer of the English
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Does blood volume decrease if a limb is amputated? Yes. The kidneys will monitor the blood pressure and try to lower the volume of blood if it is too high. People of the same weight and height don’t necessarily have the same amount of blood and the amount of blood a person has will vary
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What is a Distributed Denial of Service attack (DDoS)? It is when someone tries to shut down a machine or a network by using lots of requests at the same time from lots of different sources. A DDoS is a Denial of Service attack that comes from multiple sources. So, let’s look at a Denial
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Why can’t all animals be domesticated? There are six criteria needed for an animal to be domesticable. The first animals were domesticated about 15,000 years ago. Early people were hunter-gatherers, but they transitioned to agriculture about 10,000 years ago and most animals we use today were domesticated after that. The first animals to be domesticated
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Why do ostriches have two kneecaps? It (possibly) helps them to run faster. What does a kneecap do? The knee is basically a lever and the kneecap is the pivot point. In humans, the knee is the joint between the femur (thighbone) and the tibia (shinbone). The muscle on the front of the thigh bone
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