Consider why solar energy is a good source of energy for:
* (a) Developed countries
(b) Developing countries.

Relatively steep zone that is compared with the shelf that marks the boundary between continental crust and ocean crust.

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Which of the following describes what rocks usually are composed of ,