Author Question: Look ahead to the full-page photos at the beginnings of Chapters 5 and 6. Which features of these ... (Read 41 times)

fbq8i · **on:** Jul 16, 2018

Look ahead to the full-page photos at the beginnings of Chapters 5 and 6. Which features of these rock outcrops are similar? Which features are different?

If you were to take samples from these two outcrops and examine them closely, what would you look for to determine that one rock is sedimentary, whereas the other is metamorphic?
What will be an ideal response?

Question 2

Which of the following is the strongest argument for recycling plastics?

A) Plastics burn hot and with little ash in WTE incinerators.
B) Plastics do not contribute to leachate in landfills.
C) Plastics do not generate biogas in landfills.
D) Plastics are produced from the non-renewable fossil fuel petroleum.

stallen · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

Both photos have rocks that look layered. The layers in the Chapter 5 opener look very uniform, that is the layers all appear to have similar thicknesses. The layers in the Chapter 6 opener have layers of various thicknesses and irregularities within the layers (rippling effect or lenses). I would look at the texture and composition of my samples to determine rock type. The sedimentary rock might consist of individual grains or a fine-grained texture if the material precipitated from water. The metamorphic rock would have an interlocking texture of grains (recrystallization), minerals that form under metamorphic conditions, and crystals all aligned in one direction (foliation).

Answer to Question 2

D