1. To answer the questions that follow, use this list of some natural resources that humans use.
• bamboo and fast-growing trees
• coal
• natural gas
• solar power
• wind power
a. For each listed resource, state if it is a renewable resource or nonrenewable resource.

bamboo and fast-growing trees
coal
natural gas
solar power
wind power
b. Pick one renewable resource from the list, and explain why it is considered renewable.


c. Pick one nonrenewable resource from the list, tell how it is used for energy, and explain why it is considered nonrenewable.


(10 points)
Score

2. 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,
a. 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

Year Births Deaths Immigrants Emigrants Population (No) Population (Nt)
10 1,400,000 600,000 40,000 20,000 20,000,000 20,820,000
20 1,600,000 500,000 100,000 20,000 20,820,000
30 2,000,000 400,000 150,000 15,000
40 2,300,000 350,000 170,000 12,000
50 2,500,000 350,000 200,000 10,000
b. Answer this question: Which of the following might reasonably explain the change in Gilder’s population? Explain your choice of answer(s).
• prosperous economy only
• improved health care only
• prosperous economy along with improved health care
• neither a prosperous economy nor improved health care
Your Score ___ of 15