In 1820, the country with the highest per capita gdp was group of answer choices australia. The united states. Austria. Germany. The netherlands.

Which of the following can scientists estimate geologic time? a.observing rock sequences b.radiometric dating c.comparing fossils d.all of these

Which of the layers of the earth has the following three characteristics? i. it is a solid outer layer. ii. it is between 3 and 30 miles thick. iii. it is separated into plates. a. the outer core b. the inner core c. the mantle d. the crust

Which statement best describes how chemical equations demonstrate conservation of mass?