Worldwide, the oldest rocks at the ocean floor are about 180 million years old. In contrast, the oldest continental rocks are approximately 4 billion years old. Give a possible explanation for this large age difference. Hint: Consider which type of lithosphere, oceanic or continental, is denser and therefore more prone to subduction (and destruction) before reaching old age.

8. compare the education of a sparta boy and an athenian boy. (2 points)

Data courtesy of the un development programme 2006-2008 and world bank 2009 the chart above compares measures of development using the hdi and gdp. why might turkey rank lower in the hdi indicator even though it has a high gdp? a. turkey has a lower gdp than comparable countries in the hdi ranking. b. turkey must increase its hdi to have a higher gdp ranking. c. turkey is only compared to other european countries in gdp, not to the world, as it is in the hdi. d. turkey may struggle to provide adequate education or health care, or it may have a lower life expectancy.

Good scientists always report their observations and results truthfully. this is especially important when a scientist's results go against previous ideas or predictions. coming up with inventive ways to solve problems or produce new things