The country of Thorntown has a population of 50,000 people and covers 5,000 square miles. Last year, there were 109,000 new children born and 111,000 people died.
1. What is the current population density?
2. What is the birth rate?
3. What is the death rate?
4. What is the natural increase rate(population growth rate)?
5. In how many years will it take for the population of Thorntown to double?

Avertical or horizontal line used in graphs is called a(n) equatorhope this

This is all you, but i can give you some topics that you could try. if it rained when you want to do something outdoors, it 'limits' that human activity. maybe you want to do an experiment that goes throughout the whole year and you have to have above freezing the entire year. this 'limits' your activity. i thought of those just off of the top of my head. something that gets to me that might be getting to you is you are thinking too hard about what to do. think simply, and if it is too simple, then bump it up just a little bit.

Exposed great deposits of coal and iron ore