Science

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Welcome, children! This is the place to learn a bit about science.

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Jan. 5, 2021:

Hello, children! Today, we're going to learn about seasons. A season is a division of the year based on changes in weather, ecology, and the number of daylight hours in a given region. In popular culture, seasons are often divided by calendar date irrespective of weather and other deciding factors. On Earth, seasons are the result of Earth's orbit around the Sun and Earth's axial tilt relative to the ecliptic plane. In temperate and polar regions, the seasons are marked by changes in the intensity of sunlight that reaches the Earth's surface, variations of which may cause animals to undergo hibernation or to migrate, and plants to be dormant. 

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Jan. 18, 2021:

Hello, everyone! Today's lesson is about the geographical poles.

A geographical pole or geographic pole is either of the two points on Earth where its axis of rotation intersects its surface.[1] The North Pole lies in the Arctic Ocean while the South Pole is in Antarctica. North and South poles are also defined for other planets or satellites in the Solar System, with a North pole being on the same side of the invariable plane as Earth's North pole.[2]

Relative to Earth's surface, the geographic poles move by a few metres over periods of a few years.[3] This is a combination of Chandler wobble, a free oscillation with a period of about 435 days; an annual motion responding to seasonal movements of air and water masses; and an irregular drift towards the 80th west meridian.[4] As cartography requires exact and unchanging coordinates, the averaged[citation needed] locations of geographical poles are taken as fixed cartographic poles and become the points where the body's great circles of longitude intersect.

(Note: If you see a word that you don't know about, click the button below to find the definition of the word. Type the word that you don't know in the "Enter a word" box.)

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