What is a sparse population?

Sparse population generally means low density of population, ie., low per unit area population.

10000-10000000100

That depends on how you define sparse. In general compared to the United States it is. In terms of the amount of land as compared to the amount of people it is. Most of the population is concentrated...

Yes, very few people compared to the land

The great majority of the land mass of Australia is either arid or semi-arid, there is very little surface water, the rain fall is low and there are very few rivers that actually run other than...