1. Whenever soil is present, it occurs above the regolith layer.
True
False

2. The concept of plate tectonics ________.
a. means Africa and South America were once joined
b. is well-accepted by Earth scientists
c. was proven only a few decades ago
d. is described correctly by all of these
e. is not described correctly by any of these

3. ________ is an example of a native element.
a. Halite
b. Calcite
c. Lead
d. Iron
e. Gold

4. _________ is a dark, fine-grained extrusive rock.
a. Tufa
b. Basalt
c. Granite
d. Conglomerate
e. Shale