Question

What evidence is provided by the diagram to support continental movement?


Similar fossils are found on continents that are separated by large distances of ocean.


Freshwater organism fossils are found on continents that are surrounded by oceans.


Scientists have discovered fossils from prehistoric plants as well as animals.


Scientists have discovered four main prehistoric organisms by finding their fossils.

Question 20.



The following question has two parts. First, answer Part A. Then, answer Part B.

Part A:

What evidence does the discovery of the Glossopteris provide?


The five continents were once connected.


Plants were once capable of moving.


Ocean waters have evaporated.


All plants can live in any environment.


Part B:

Which answer provides an explanation for the answer choice in Part A?


Africa and America have different climates.


The locations of the oceans have changed.


Glossopteris plants had bulky seeds.


Glossopteris fossils were found on all continents.

Question 21.



What process could be responsible for the movement of large landmasses over time?


erosion of the land


effects of global warming


motion of the tectonic plates


flooding of the oceans

Question 22.



Glossopteris plants had large, bulky seeds that would have been difficult to distribute over long distances. Which most likely explains why Glossopteris fossils were found on all five continents?


The landmasses were once joined together.


The plants had few predators.


The plants were once mobile.


The landmasses once contained freshwater.

Notes

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Answer 1

Initial diagram question — answer: Similar fossils are found on continents that are separated by large distances of ocean.
- That pattern supports continental movement because identical fossils on widely separated continents imply those continents were once joined.

Question 20
Part A: The five continents were once connected.
Part B: Glossopteris plants had bulky seeds.
- Explanation: Glossopteris fossils occur on many southern continents, and because their seeds were large (unlikely to disperse across oceans), the best explanation is that the landmasses were once connected.

Question 21
Answer: motion of the tectonic plates.
- Plate tectonics explains how large landmasses move over geologic time.

Question 22
Answer: The landmasses were once joined together.
- Large, bulky seeds couldn’t cross oceans, so finding Glossopteris on all five continents implies the continents were connected.