Biologist estimate how long ago species separated from a common ancestor using a technique called. Answers: 1. a molecular clock 2. Radiometric dating 3. relative dating 4. stratipraghy

What does the interpretation of experimental data leads to? a theroy or a hypothesis

Several times a year volcanoes erupt along the Aleutian Island chain in southern Alaska. What geologic feature is responsible for these hazardous events? a. convergent plate boundary b. transform plate boundary c. divergent plate boundary d.

Steve works at a gas station in an urban area. he is constantly exposed to particulate material emitted from vehicles. for this reason, steve is likely to suffer from which of these

What happens during a volcanic eruption? What would you see in the first few minutes, hours, first day, a week later?

How can minerals be classified

1. Describe the most important diagnostic properties in igneous rocks. 2. What minerals would you expect to form in basalt? (Hint: Consider composition and Bowen's reaction series). Explain your answer.

What is the most important role of the ecosystems of the Andes? A. Keep the environment stable and reduces air pollution B. Reduce the chance of floods, desertification, and landslides C. Regulate the availability of freshwater D. All of the above

All of the following are examples of thematic maps except:

Which is used by scientists as evidence that Earth's inner core is solid? O A. S waves cannot travel through the inner core, creating a shadow zone. O B. Seismic waves change speed when they go from the inner core to the outer core. O C.

What role did geography play in the early African kingdoms? Volcanic eruptions scared away attackers. Mineral deposits brought wealth and power. The Great Rift separated them from the continent. Tropical storms extended the growing season.