Which of the following physical properties are unreliable and not unique to a particular mineral and so must be used only cautiously when identifying minerals in the absence of scientific instruments? a. hardnessb. cleavagec. densityd. color

Pioneer farmers settling the grasslands of the American West often build houses of sod, while early settlers of the eastern forest built wooden structures like log cabins. This suggests that building materials ...

Helium was discovered on earth years after it had been discovered on the sun. a. True b. False

When scientists analyze a rock for its age they are able to determine what events occurred and how it affected life. What do scientists deduce from this? A. determine which fossils are more dense B. determine soil settling rates on earth C.

When an earthquake occurs energy radiates in all directions from its source which is called the?

What are the economic regions in the u. s

What is the difference of a high-pressure area and low pressure area in density

What should a farmer do who wants to keep his soil as productive as possible

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: