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In this lesson, we are learning about imaginary lines.
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OK, what are imaginary lines?
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Imaginary lines are things we can find on maps and globes,
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and they are called meridians and parallels.
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What is the difference between meridians and parallels?
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Meridians are the distance from the granite meridian,
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and parallels are the distance from the equator.
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So that's the main difference between meridians
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and parallels, that meridians are related to the granite,
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meridians and parallels are related to the equator.
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Now we're going to move on to the Earth's movements.
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As you already know from third grade,
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the Earth has two movements, rotation,
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which is the movement the Earth has around its own axis,
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and revolution, which is the movement the Earth does
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around the sun.
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What about the Earth revolution?
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Well, this is the movement of the Earth around the sun.
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It takes 365 days and six hours,
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and it involves the Earth axis, which
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is an imaginary line that goes from the North Pole
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to the South Pole.
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Thanks to this movement, we have the seasons.
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Now let's move on to the Earth rotation.
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What is rotation?
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It is a movement where the Earth spins on its own axis,
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and it takes 24 hours a day, and it
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causes the day and night in the spectrum.
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You can see the main difference between rotation and revolution.
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In rotation, the Earth spins on its own axis,
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whereas in the revolution one, it moves around the sun.
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In rotation, we have day and night,
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and in revolution, we have the season.
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Rotation takes 24 hours a day, and revolution
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takes the whole year.
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In this unit, we need to talk as well about discovery.
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We're going to talk first about Aristotle,
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which is a man that discovered that the Earth wasn't flat.
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Why?
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Because in ancient history, people
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believed that the Earth was flat.
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But astronomers such as Aristotle
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calculated that it was a sphere.
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He observed that the Earth's shadow on the moon
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was curved, and the different stars
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could be seen from different places.
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They also observed that when a ship appeared on the horizon,
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the top was visible before the rest of the ship.
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Now we have to talk as well about the telescope, which
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is something that was discovered at the beginning of the 17th
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century.
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Telescopes use lenses to help us see objects
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that are far away.
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Astronomers discovered planets such as Uranus and Neptune
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using telescopes.
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Space.
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In space, we need to talk about Yuri Gagarin, Neil Armstrong,
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and Buzz Aldrin and Pedro Duque, which
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was the first Spanish person to go into space.
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In 1961, Yuri Gagarin was the first person to go into space.
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He was there for 108 minutes.
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And in 1969, astronauts such as Neil Armstrong and Buzz Aldrin
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landed and walked on the moon as part of the Apollo 11 space
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mission.
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In 1998, which was yesterday, speaking in scientist's words,
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Pedro Duque was the first Spanish person
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to go into space.
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So apart from this, we need to talk as well about the space
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station, the International Space Station.
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Since 2000, astronauts have lived in the International
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Space Station.
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The space station takes 92 minutes to orbit the Earth.
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Astronauts do research and experiments
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in biology, physics, and astronomy.
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The International Space Station can sometimes
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be seen from Earth.
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And that was all.
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See you tomorrow in class.
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- Subido por:
- Alba M.
- Licencia:
- Todos los derechos reservados
- Visualizaciones:
- 4
- Fecha:
- 28 de junio de 2023 - 17:00
- Visibilidad:
- Clave
- Centro:
- CP INF-PRI MARIO VARGAS LLOSA
- Duración:
- 04′ 02″
- Relación de aspecto:
- 1.59:1
- Resolución:
- 1250x784 píxeles
- Tamaño:
- 54.20 MBytes
