Identifying Sources of Fresh Water
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Which statements about freshwater sources are true? Check all that apply.
Only about 3 percent of Earth's water is fresh water.
Most of the fresh water on Earth is groundwater.
About 75 percent of the fresh water on Earth is frozen in ice sheets
The largest source of usable fresh water is groundwater
More fresh water is in the atmosphere than in rivers and lakes

The hypothetical island country of gilder lies in the mediterranean sea off the coast of france. demographers have studied gilder for the past 50 years. at the beginning of the study, gilder had a population of 20 million. the demographers have measured birth and death numbers, as well as immigration and emigration numbers, as shown in the data table. from the data, calculate the population of gilder for each 10-year period by filling in the population (no) and population (nt) columns in the data table. use this formula to do your calculations: population size: nt = no + (b + i) – (d + e)initial population = 20,000,000