Question

true or false

1. topography expresses the differences of elevations of mountains and the differences of depths in a body of water.
2. mount everest has the greatest actual height of any mountain in the world.
3. the earths most extensive mountain system is underwater.
4. movement of molten magma within the crust can create tectonic forces.
5. a rift valley forms when blocks of rock strata between parallel faults sag creating cliff - like valley walls.
6. creationist geologists believe that all plateaus originally formed from flood sediments.
7. the ages of the oceans can be calculated using the sedimentation rate and the thickness of the sediments.
8. monadnocks are large masses of hardened magma that first formed under sedimentary rock but were then exposed by erosion.
9. geologists believe that all \fossilized sand dunes\ in sandstone are evidence for wind deposition.

Explanation:

These questions are related to geological concepts, which fall under the subfield of Geography (or Geology, which can be considered under Geography or as a separate subfield in Natural Science). Let's analyze each:

1. Topography does represent elevation differences of landforms (mountains) and depths of water bodies. So True.
2. Mount Everest has the highest elevation above sea level, but "actual height" can be ambiguous, but generally, it's considered to have the greatest height (elevation) among mountains. So True (assuming "actual height" refers to elevation above sea level).
3. The Mid - Ocean Ridge is the most extensive mountain system and is underwater. So True.
4. Movement of molten magma (like in mantle convection) drives tectonic forces, including those related to crustal movement. So True.
5. Rift valleys form when blocks between parallel faults (normal faults) sag, creating valley walls. So True.
6. Creationist geologists' beliefs about plateaus forming from Flood sediments are part of their geological interpretations (though not mainstream). So True (from their perspective).
7. Using sedimentation rate and sediment thickness to calculate ocean ages is a method (though with assumptions). So True.
8. Monadnocks are residual hills, not hardened magma masses (those are batholiths/intrusions). So False.
9. Fossilized sand dunes in sandstone are evidence of wind deposition (aeolian processes). So True.

Answer:

1. True
2. True
3. True
4. True
5. True
6. True
7. True
8. False
9. True