Plate Tectonics

Early observers thought continents may have been joined based on what observations

• rocks and fossils
• earthquakes.
• magnetism.
• coastline

A German scientist Alfred Wegener was the first to hypothesize that ...........

• Continents were once joined
• The sea floor is spreading
• Continents are moving
• The Earth's magnetic pole flips

Pangaea was an ancient supercontinent made up of...

• America, Greenland, and Europe.
• Antarctica, India, and America.
• all of Earth’s continents.
• South Africa, India, Australia, and South America.

Evidence used by Wegener to supported his idea of continental drift included

• Ocean rocks and sediments
• Ocean floor topography
• Magnetic isochron patterns
• Climatic data

Wegener suggested that coal beds discovered in Antarctica indicated that this continent was

• once under water
• always  frozen
• once near the equator
• part of Africa

One of the fossils Wegener used to support his hypothesis of continental drift was

• Glossopteris
• Trilobite
• insects in tree amber
• ammonite molds

Peer scientists reviewing Wegener’s hypothesis of continental drift rejected his notion because

• His evidence was too few to make a valid conclusion 
• He did not explain how continents move and what moves them
• His evidence was not clear in showing  how continents were joined
• He lied by including false evidence

The rejection of Mr. Wegener's hypothesis  teaches us that

• Indirect evidence is not sufficient to prove a hypothesis
• Direct evidence is hard to find 
• Hypotheses are hard to prove
• Scientists of the early 1900s were not smart enough

Evaluating the relationship between scientific laws, theories, and hypothesis, one can say

• Scientific hypothesis can became laws
• Scientific theories can became laws
• Scientific laws can be changed
• Scientific hypothesis can became theories

Where are most divergent boundaries located?

• Along the middle of most ocean floors
• Along the margins of most continents
• Across the middle of many continents
• All the above options are correct