(i)

The solar system ($\frac{1}{2}$ mark)

(ii)

I → Mercury
II → Venus
III → Earth
IV → Mars
V → Jupiter
VI → Saturn
VII → Uranus
VIII → Neptune

$\frac{1}{2}$ mark each x 8 = 4 marks

(iii)

II/Venus Which part is the hottest ($\frac{1}{2}$ mark)

Note: Venus is the hottest planet due to its thick, heat-trapping atmosphere

(iv)

IV/Mars is known as the "Red" planet" ($\frac{1}{2}$ mark)

(v)

VI/Saturn is known for its prominent rings ($\frac{1}{2}$ mark)

(vi)

Terrestrial (rocky) planets

I/Mercury
II/Venus
III/Earth
IV/Mars

$\frac{1}{4}$ mark each x 4 = 1 mark

Note: the first four planets are terrestrial (rocky) planets

(vii)

Characteristics of III (Earth)

1. It is spherical or geoid shaped
2. It has more oxygen than other planets

3. It is the only planet which supports life

4. It has one natural satellite
5. It is the 5th largest planet
6. It rotates on its axis
7. It rotates eastwards (from west to east)
8. It revolves round the sun
9. It completes a rotation in 24 hours
10. It completes a revolution in 365 1/4 days
11. It has different seasons
12. It is the third planet from the sun
13. The surface is made up of 29% land and 71% water
14. It is about 148.8 million km away from the sun
15. It has outer solid crust
16. It possesses an inner molten core
17. It surrounded by gaseous envelope
18. It the zone of life on the earth is at the interface of hydrosphere, lithosphere and the atmosphere
19. It axis is inclined at angle of 66½°
20. It has surface area of 443 million km²
21. It has equatorial circumference of 40,085 km
22. It has polar circumference of 39,955 km
23. It has equatorial diameter of 12,762 km
24. It is the most dense planet
25. It has polar diameter of 12,722km

Any 3 x 1 mark = 3 marks