Physics (9-1) - 0972 CIE

The Earth And The Solar System (continued 1)

Muhtasari

Our Solar System is a single star with eight planets, a scattering of dwarf planets, asteroids, moons and comets, all held in orbit by the Sun's gravity. Look closely and a pattern appears: small rocky worlds near the Sun, giant gas worlds far out, and a story of how they formed.

In this lesson you will describe the contents of the Solar System and the order of the planets, explain why the inner planets are rocky and the outer ones gaseous using an accretion model, and learn that orbits are elliptical. You will also interpret real planetary data.

Malengo

  1. Describe the Solar System as containing: (a) one star, the Sun (b) the eight named planets and know their order from the Sun (c) minor planets that orbit the Sun, including dwarf planets such as Pluto and asteroids in the asteroid belt (d) moons, that orbit the planets (e) smaller Solar System bodies, including comets and natural satellites
  2. Know that, in comparison to each other, the four planets nearest the Sun are rocky and small and the four planets furthest from the Sun are gaseous and large, and explain this difference by referring to an accretion model for Solar System formation, to include: (a) the model’s dependence on gravity (b) the presence of many elements in interstellar clouds of gas and dust (c) the rotation of material in the cloud and the formation of an accretion disc
  3. [Supplement] Know that planets, minor planets and comets have elliptical orbits, and recall that the Sun is not at the centre of the elliptical orbit, except when the orbit is approximately circular
  4. [Supplement] Analyse and interpret planetary data about orbital distance, orbital duration, density, surface temperature and uniform gravitational field strength at the planet’s surface

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Maelezo ya Somo

The Solar System is the bridge from everyday physics to astronomy. The same gravity that makes things fall holds the planets in their orbits, and the accretion model shows how the laws you have learned built whole worlds. Data-interpretation questions reward careful reading of a table.

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Tathmini ya Somo

Hongera kwa kukamilisha somo la The Earth And The Solar System (continued 1). 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.

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  1. The correct order of the planets from the Sun is: A. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune B. Venus, Mercury, Earth, Mars, Saturn, Jupiter, Neptune, Uranus C. Earth, Mars, Mercury, Venus, Jupiter, Saturn, Uranus, Neptune D. Mercury, Earth, Venus, Mars, Jupiter, Saturn, Neptune, Uranus Answer: A
  2. The inner planets, compared with the outer planets, are: A. large and gaseous B. small and rocky C. large and rocky D. small and gaseous Answer: B
  3. The orbits of planets and comets are: A. perfect circles with the Sun at the centre B. elliptical with the Sun at one focus C. straight lines D. square Answer: B
  4. In the accretion model, the Solar System formed from: A. a single solid block B. a rotating cloud of gas and dust pulled together by gravity C. light from the Sun D. the Earth breaking apart Answer: B
  5. We see the planets because they: A. produce their own light B. reflect sunlight C. emit gamma rays D. are on fire Answer: B

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Vitabu Vinavyopendekezwa

Cambridge IGCSE Physics Coursebook
Cambridge IGCSE Physics Coursebook
Manukuu: Third edition
Mchapishaji: Cambridge University Press
Mwaka: 2021
ISBN: 978-1-108-88807-3
Maelezo: Endorsed coursebook with full coverage of the 0625/0972 syllabus, worked examples and practical skills.
Cambridge IGCSE Physics
Cambridge IGCSE Physics
Manukuu: Third edition
Mchapishaji: Hodder Education
Mwaka: 2014
ISBN: 978-1-4441-7642-1
Maelezo: Endorsed textbook covering the Core and Supplement content with worked examples and questions.

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