Motion In The Universe
Gbogbo ọrọ náà
The Moon has been falling towards the Earth for four and a half thousand million years and has never arrived. Every planet, every moon, every satellite and every comet is held on its path by the same single force, and that force is gravity.
This lesson sets out the scale of the universe, explains why gravitational field strength is different on every world, and shows how gravity produces the very different orbits followed by planets, moons and comets. Expect calculation questions on weight and orbital speed, and explanation questions on why orbits happen at all.
Ebumnobi
- Know that the universe is a large collection of billions of galaxies, a galaxy is a large collection of billions of stars, and our solar system is in the Milky Way galaxy
- Understand why gravitational field strength, g, varies and know that it is different on other planets and the Moon from that on the Earth
- Explain that gravitational force causes moons to orbit planets, causes the planets to orbit the Sun, causes artificial satellites to orbit the Earth, and causes comets to orbit the Sun
- Describe the differences in the orbits of comets, moons and planets
Akọmọ Ojú-ẹkọ
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ayẹwo Ẹkọ
Ekele diri gi maka imecha ihe karịrị na Motion In The Universe. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- Which force keeps a planet in orbit around the Sun? A) Magnetic force B) Gravitational force C) Electrostatic force D) Friction Answer: B
- The Milky Way is best described as: A) Our solar system B) A galaxy of billions of stars C) The whole universe D) A large comet Answer: B
- An astronaut of mass 75 kg stands on the Moon, where g is 1.6 N/kg. Her weight is: A) 12 N B) 47 N C) 120 N D) 735 N Answer: C
- Where in its orbit does a comet travel fastest? A) When it is furthest from the Sun B) When it is closest to the Sun C) It travels at a constant speed throughout D) When it crosses the orbit of the Earth Answer: B
- Compared with a planet close to the Sun, a planet far from the Sun has: A) A shorter orbital period and a higher speed B) A longer orbital period and a higher speed C) A longer orbital period and a lower speed D) The same orbital period Answer: C
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Àwọn Ìwé Tó Dáa Láti Kà
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Motion In The Universe? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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