Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format:
Specification Point 8.2 - Know that the universe is a large collection of billions of galaxies, that a galaxy is a large collection of billions of stars and that our solar system is in the Milky Way galaxy.
Specification Point 8.3 - Understand why gravitational field strength, g, varies and know that it is different on other planets and the Moon from that on the Earth.
Specification Point 8.4 - 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.
Specification Point 8.5 - Describe the differences in the orbits of comets, moons and planets.
Specification Point 8.6 - Use the relationship between orbital speed, orbital radius and time period.
Complete set of Chapter 8 Lessons are available.
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