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Teacher`s Guide
Teacher`s Guide

... We should not be afraid of meteorites! Rocks and dust that come from space usually burn up before reaching the ground as meteorites. Sometimes, a giant meteorite hits the Earth, but that is very rare.At night, meteoroids — also called shooting stars — can be seen streaking through the sky. ...
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... The most reasonable explanation is that Earth is tilted 23.5 o. This is the cause of Earth’s seasons Some have suggested that distance is the cause, but this was shown not to be true by the results of the Apparent Size of the Sun activity. According to the data from the activity, Earth is closest ...
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Earth's rotation



Earth's rotation is the rotation of the planet Earth around its own axis. The Earth rotates from the west towards east. As viewed from North Star or polestar Polaris, the Earth turns counter-clockwise.The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface. This point is distinct from the Earth's North Magnetic Pole. The South Pole is the other point where the Earth's axis of rotation intersects its surface, in Antarctica.The Earth rotates once in about 24 hours with respect to the sun and once every 23 hours 56 minutes and 4 seconds with respect to the stars (see below). Earth's rotation is slowing slightly with time; thus, a day was shorter in the past. This is due to the tidal effects the Moon has on Earth's rotation. Atomic clocks show that a modern-day is longer by about 1.7 milliseconds than a century ago, slowly increasing the rate at which UTC is adjusted by leap seconds.
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