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Plan №22
The theme of the lesson: Satellite orbits
The aims of the lesson: тақырып бойынша білімдерін ағылшын тілінде
баяндай алу қабілеттерін дамыту, ағылшын тілінде заңдар мен
анықтамаларды айта білу дағдыларын қалыптастыру, оқушылардың
оқылым және айтылым дағдыларын арттыру.
The type of the lesson: жаңа тақырыпты игеру
Materials: оқулық, слайд, тапсырмалар
The plan of the lesson:
I. Organizational moment
II. Activity
III. Learning material
IV. Worksheet
V. Result
I. Organizational moment
- Good morning, my dear students! How are you? Is anybody absent today?
Today we have a very interesting topic “Satellite orbits”. Write the date on the
board, please. Get ready for the lesson. All right, class, let us get to work.
II. Activity
What is satellite? How it work?
III. Learning material
Gravity is the force of attraction between masses. It is the
centripetal force
needed to keep a satellite in orbit. The greater the mass of the satellite, the greater
the force involved. A satellite can be a planet orbiting a star, like the Sun; an object
orbiting a planet, like the Moon or a manmade satellite orbiting the Earth.
Artificial satellites were launched in orbit around the Earth using a rocket.
Satellites in lower orbits (nearer the Earth) travel faster.
Satellites in
low polar orbits are used for forecasting the weather, spying and
observing the Earth's surface. It takes them around 90 minutes to orbit the Earth.
Geostationary satellites are in orbit above the equator. It takes them 24 hours to
orbit the Earth and they appear to be in the same position. They are used for
communications, such as mobile phones, satellite TV and GPS.
Orbits can be
highly elliptical (oval), as opposed to circular.
Periodic comets
have highly elliptical orbits.
When they are close to the Sun, the gravitational
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force is stronger than when they are further out. Their velocity changes as well,
being higher close to the Sun and lower further from the Sun.
Достарыңызбен бөлісу: