El Imperfecto: please complete the following sentence by selecting the correct form in the Imperfect Tense. Yo ___________________ canciones románticas.  ( cantar)

Which of these may be kinds of chemical sedimentary rocks? Choose all correct answers.

(a) What are the differences between weathering and erosion? (b) Give several examples of different kinds of weathering. (c) Give several examples of different kinds or erosion.

How is absolute time commonly determined? Choose all that are correct.

What are the two most significant ways that rocks become metamorphosed? (Choose two answers.)

Where does metamorphism occur at high pressure and low temperature?

Eruptions on Hawaii are almost all – maybe all – effusive. But, eruptions in the Andes and in mountain ranges of Central America and the Cascades are often explosive. Explain this difference.

The most common sedimentary rock type is shale. Where is the sediment deposited that later turns into shale?

Where might you find sediment that was deposited in sloping layers? Choose all that are correct.

(a) What are the differences between felsic, mafic, and intermediate-composition igneous rocks? (b) Name a few key minerals that can be found in felsic and mafic rocks. (c) Would these minerals be possible in both intrusive and extrusive igneous rocks? Explain why or why not.