What is a lava tube? A lava tube is a tunnel made by flowing lava that sets on the outside but continues to flow on the inside. They can range from very small to enormous. For lava tubes to form, you obviously need lava. Not all volcanic eruptions produce lava. Some of the bigger, more […]
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What is a sinkhole? A sinkhole is a place where the ground has collapsed to leave a hole, caused by material below the ground being removed. Sinkholes can range from just a few meters deep to enormously deep, and they can be caused naturally or by human activity. The largest sinkhole in the world is
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How did they find the Chicxulub crater? They found the Chicxulub crater, the remains of the asteroid that wiped out the dinosaurs, when they were looking for oil. The Chicxulub crater was made when an asteroid ten kilometers in diameter hit Earth. It landed just over 66 million years ago and left a crater that
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What causes rogue waves? There are many reasons why rogue waves can form but three of the most common theories are modulational instability, constructive interference, and another current. Tsunamis can be thought to be rogue waves, but they aren’t. They have a much longer wavelength. The majority of the waves in the sea are caused
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How do people live in the Arctic and the Antarctic? People live in the Arctic by staying warm, protecting themselves from the extreme weather, and having enough food to last through the winter. (In case you get confused, the Arctic is where the North Pole is located and the Antarctic is where the South Pole
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What is the Sargasso Sea? The Sargasso Sea is the only sea in the world that doesn’t have any land borders. It is located in the Atlantic Ocean and has an area of 3.5 million square kilometers. That makes it roughly 3% of the Atlantic Ocean. The Sargasso Sea is bordered by four ocean currents.
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What is a steppe? A steppe is a dry, grassy plain that is found in a temperate climate. It is one of the many biomes on Earth. The word “steppe” comes from the Russian word “step” (степь), which means low lying land. It came into English through German. In Russian, it us pronounced stjepj, and
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Why is Jakarta sinking? Jakarta is sinking by as much as 30 cm a year in some places, and the cause is overextraction of groundwater. Jakarta is the capital city of Indonesia, and home to 11.3 million people, which is roughly 4% of all Indonesians. It is on the northwest coast of Java and is
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How many layers does the Earth have? At its simplest, the Earth has four layers. These are the crust, the mantle, the outer core, and the inner core. However, these layers can be divided up into smaller layers as well, depending on how you define a layer. The crust is the rocky outer layer that
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What causes an avalanche or landslide? The causes of avalanches and landslides do have some similarities, but landslides involve the movement of rock, earth, and debris, while avalanches involve snow and ice. An avalanche starts when an unstable mass of snow and ice breaks loose and slides down the slope. The avalanche picks up speed
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