Science Single Award - 4SS0 PearsonEdexcel

Motion In The Universe

Muhtasari

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.

Malengo

  1. 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
  2. Understand why gravitational field strength, g, varies and know that it is different on other planets and the Moon from that on the Earth
  3. 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
  4. Describe the differences in the orbits of comets, moons and planets

Ramani ya mawazo

Mada hii imechorwa ili uone jinsi mawazo yanavyounganika.

Fungua ramani ya mawazo kwenye programu

Kadi za kumbukumbu

Mazoezi ya haraka ya kumbukumbu kuhusu kinachopimwa katika mada hii.

Fanya mazoezi ya kadi hizi kwenye programu

Maelezo ya Somo

Drop a ball and it falls to the ground in under a second. Throw it sideways and it still falls, but it lands further away. Throw it hard enough and the ground curves away beneath it as fast as it falls, so it never lands at all. That is an orbit: not an escape from gravity, but a permanent fall that keeps missing. Everything in this lesson follows from that one idea.

Dokezo Kamili la Somo Linapatikana kwenye Programu ya Green Bridge

Pata programu ya Green Bridge CBT kwenye simu au kompyuta yako kwa maktaba kamili ya IGCSE: mitihani ya miaka iliyopita, miongozo ya usahihishaji, ramani za mawazo, kadi za marudio na masomo ya sauti.

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Tathmini ya Somo

Hongera kwa kukamilisha somo la Motion In The Universe. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.

Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.

Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.

  1. Which force keeps a planet in orbit around the Sun? A) Magnetic force B) Gravitational force C) Electrostatic force D) Friction Answer: B
  2. 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
  3. 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
  4. 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
  5. 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

Fanyia kazi maswali haya kwenye programu

Fanyia kazi maswali haya kwenye programu

Vitabu Vinavyopendekezwa

Pearson Edexcel International GCSE (9-1) Science Single Award Student Book
Pearson Edexcel International GCSE (9-1) Science Single Award Student Book
Manukuu: First edition
Mchapishaji: Pearson Education
Mwaka: 2018
ISBN: 978-0-435-19148-5
Maelezo: Endorsed student book for 4SS0.

Jifunze zaidi kutoka vyanzo huria

Vimechapishwa na mashirika mengine chini ya leseni huria na vinatajwa kama wanavyoomba. Viungo hufungua tovuti zao.

Fanya Mazoezi ya Maswali ya Majaribio

Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Motion In The Universe? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.

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