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Physics

8. Astrophysics
8.1 Motion in the Universe>8.2 Stellar Evolution>8.3 Cosmology>

1. Forces & Motion

1.1 Movement and Position >1.2 Forces, Movement, Shape and Momentum >

2. Electricity

2.1 Mains Electricity >2.2 Energy and Voltage in Circuits >2.3 Energy Charge >

3. Waves

3.1 Properties of Waves >3.2 The Electromagnetic Spectrum >3.3 Light and Sound >

4. Energy Resources & Energy Transfers

4.1 Energy Transfers >4.2 Work and Power >4.3 Energy Resources and Electricity Generation >

5. Solids, Liquids & Gases

5.1 Density and Pressure >5.2 Change of State >5.3 Ideal Gas Molecules >

6. Magnetism & Electromagnetism

6.1 Magnetism >6.2 Electromagnetism >6.3 Electromagnetic Induction >

7. Radioactivity & Particles

7.1 Radioactivity >7.2 Fission and Fusion >

8.1 Motion in the Universe

8.1.1 Use the following units: kilogram (kg), metre (m), metre/second (m/s), metre/second2 (m/s2), newton (N), second (s), newton/kilogram (N/kg)

Mass – kilograms (kg)

Distance – metres (m)

Velocity – metres per second (m/s)

Acceleration – metres per second squared (m/s²)

Force – newtons (N)

Time – seconds (s)

Gravitational field strength – newtons per kilogram (N/kg)

8.1.2 Know that:

the universe is a large collection of billions of galaxies
a galaxy is a large collection of billions of stars
our solar system is in the Milky Way galaxy

8.1.3 Understand why gravitational field strength, g, varies and know that it is different on other planets and the Moon from that on the Earth

8.1.4 Explain that gravitational force:

causes moons to orbit planets
causes the planets to orbit the Sun
causes artificial satellites to orbit the Earth
causes comets to orbit the Sun

8.1.5 Describe the differences in the orbits of comets, moons and planets

8.1.6 Use the relationship between orbital speed, orbital radius and time period: