What are electrolytes? Electrolytes are essential minerals that can carry an electric charge when they are dissolved in water. Our bodies need electrolytes because they serve a number of functions and the lack of those functions would shut us down. Electrolytes manage the flow of water in and out of cells to prevent dehydration or […]
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How does grass break concrete? Grass breaks concrete by widening existing cracks until the concrete falls apart. Grass can’t actually break solid concrete, but it can exploit cracks that are already there. This is due to a property of concrete. Concrete has incredible compressive strength, which means it can support an enormous amount of force
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Why does jaundice turn people yellow? Jaundice turns people yellow because a yellow-orange pigment called bilirubin builds up in the blood and body tissues. The word jaundice came into English from French. In Old French, jaune meant yellow, and that came from a Latin word meaning greenish-yellow. That is why jaundice has always been connected
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How does ivy grip walls? Ivy grips walls by using special roots that grow out from its stems. These are called aerial roots or adventitious roots, and they work like tiny natural anchors. There are many different types of plants that grow up walls, but ivy is probably one of the most well-known. Ivy climbs
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How do warning colors on animals work? Warning colors on animals work by being easy to see, easy to remember, and unpleasant enough that predators learn not to make the same mistake twice. Many animals are either trying to hide from predators or trying to creep up on prey. That is why so many animals
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How do insects survive the winter? A lot of insects don’t survive the winter, and they haven’t evolved to. They are born, live long enough to reproduce, lay eggs, and die. However, that does not mean the species dies out. Many insects survive winter as eggs, larvae, nymphs, or pupae. Other insects live through the
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How can some animals be transparent? Animals can be transparent if their bodies let light pass through them without absorbing, reflecting, or scattering too much of it. There are not many transparent animals, and most of them are found in water. Some of them are partially transparent and some are almost completely transparent. Even animals
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What causes travelers’ diarrhea? Travelers’ diarrhea is usually caused by bacteria, viruses, or parasites that get into food or water. The most common causes are bacteria, especially certain types of Escherichia coli, or E. coli. Travelers’ diarrhea is something that affects a lot of people after they have been traveling for a few days or
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How do plants grow towards light? Plants grow towards light using a process called phototropism, which is driven by a hormone called auxin. Plants photosynthesize, which obviously requires sunlight. They need to be able to grow towards sunlight in order to photosynthesize as much as possible. To do this, they grow more on the side
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Why do we get altitude sickness? I want to say that we get altitude sickness because we are too high up. More specifically, altitude sickness happens because the body cannot get enough oxygen at high altitude. It is more likely the higher we go, but it depends a lot on the individual. Some people get
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