Explain how natural resources are identified and why natural resources are unevenly distributed. Please help me I will write this in my own words and you will be given 20 points ad brainlist also please don't put a super long answer just a small simple paragraph and don't give me a link..

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt