Question

1. the slowly increasing distance between south america and africa is due to
2. old faithful geyser at yellowstone national park in the united states acquires its energy from a
3. layered exposed by erosion can be seen when looking at the grand canyon in the

united states.

1. australia is composed of relatively old and thick
2. the extremely deep ocean mariana trench is a result of
3. found in the atlantic ocean between north america and europe is composed of dense

and relatively young rock.

1. the earthquakes that occur in southern california generally occur above a

Explanation:

1. South America and Africa move apart due to seafloor spreading at the Mid-Atlantic Ridge.
2. Old Faithful is powered by a hot spot (stationary magma source under the crust).
3. The Grand Canyon’s layered structures are sedimentary rock exposed by erosion.
4. Australia is a continent, so it consists of continental crust (old, thick).
5. The Mariana Trench forms from subduction (dense oceanic crust diving under continental crust).
6. The Atlantic Ocean between North America and Europe has seafloor crust (dense, young from spreading).
7. Southern California earthquakes occur along a fault (San Andreas Fault, a transform boundary).

Answer:

1. seafloor spreading
2. hot spot
3. sedimentary rock
4. continental crust
5. subduction
6. seafloor crust
7. fault