3 (a) State the name of the force that keeps the Moon in orbit around the Earth - Edexcel - GCSE Physics - Question 3 - 2018 - Paper 1
Question 3
3 (a) State the name of the force that keeps the Moon in orbit around the Earth.
(b) Explain why the distance between the Earth and Jupiter changes a lot but the d... show full transcript
Worked Solution & Example Answer:3 (a) State the name of the force that keeps the Moon in orbit around the Earth - Edexcel - GCSE Physics - Question 3 - 2018 - Paper 1
Step 1
State the name of the force that keeps the Moon in orbit around the Earth.
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Answer
The force that keeps the Moon in orbit around the Earth is called gravitational pull.
Step 2
Explain why the distance between the Earth and Jupiter changes a lot but the distance between the Earth and the Moon stays almost the same.
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Answer
The distance between the Earth and Jupiter changes significantly because both planets have elliptical orbits around the Sun and are at varying distances from each other depending on their positions in these orbits. In contrast, the distance between the Earth and the Moon remains fairly constant because the Moon orbits the Earth in a nearly circular path, which keeps the distance relatively stable.
Step 3
State one way that this model agrees with the currently accepted model of the Solar System.
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Answer
One way this model agrees with the currently accepted model of the Solar System is that the planets, including Earth, orbit around the Sun.
Step 4
State two ways this diagram could be changed to make it more like the currently accepted model of the Solar System.
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Answer
Place the Sun at the center of the diagram.
Place the Earth in its correct position further from the Sun.
Step 5
Explain how his observations provided evidence for the currently accepted model of the Solar System rather than evidence for the previous model.
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Answer
Galileo's observations with the telescope revealed moons orbiting Jupiter, demonstrating that not all celestial bodies orbit the Earth. This supported the heliocentric model where moons can orbit other planets, providing evidence against the geocentric model, which posited that everything orbits the Earth.
