GEOLOGY

EARTH SCIENCE

TECTONICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A group of students cut pieces of foam shaped like the continents and float them in a container of water. The students use a straw to create currents in the water and observe as the continents move apart from one another. What theory have the students modeled?
A
Continental drift theory
B
Paleomagnetic theory
C
Seismic activity theory
D
Convection current theory
Explanation: 

Detailed explanation-1: -One type of evidence that strongly supported the Theory of Continental Drift is the fossil record. Scientists have found fossils of similar types of plants and animals in rocks of similar age. These rocks were on the shores of different continents. This suggests that the continents were once joined.

Detailed explanation-2: -The movement of these tectonic plates is likely caused by convection currents in the molten rock in Earth’s mantle below the crust. Earthquakes and volcanoes are the short-term results of this tectonic movement. The long-term result of plate tectonics is the movement of entire continents over millions of years (Fig.

Detailed explanation-3: -Continents move apart or come together at speeds of a few centimeters per year. Fossils of similar organisms have been found on several continents separated by oceans. If you could superimpose similar rock types onto the maps, these rocks would be in the area where Africa and South America fit together.

Detailed explanation-4: -In fact, plate tectonics actually combine two other theories, continental drift and seafloor spreading into a comprehensive global theory. It’s curious that the continents on opposite sides of the Atlantic Ocean fit together so well, almost like a jigsaw puzzle.

There is 1 question to complete.