What was the main idea of Wegener's continental drift theory?
Land masses move across Earth's surface over time.
They were found on lands now separated by a wide ocean.
that Earth's landmasses move over time
The main idea of Alfred Wegener's continental drift theory, proposed in the early 20th century, was that the Earth's continents were once joined together in a single supercontinent called Pangaea. According to Wegener, over time, the continents gradually drifted apart and assumed their current positions. He supported this theory with evidence such as the similar shapes of the continents on opposite sides of the Atlantic Ocean, the matching geological features and rock formations, and the distribution of fossils across different continents. However, his theory faced significant skepticism and was not widely accepted until the later development of the theory of plate tectonics.
What was the main idea of Wegener's continental drift theory?(1 point)
Responses
All land masses on Earth's surface are stationary.
All land masses on Earth's surface are stationary.
Earth's surface is composed of moving plates.
Earth's surface is composed of moving plates.
Land masses will eventually be replaced by ocean.
Land masses will eventually be replaced by ocean.
Land masses move across Earth's surface over time.
Why were Cynognathus fossils were important to Wegener's theory?(1 point)
Responses
They were the oldest fossil found at the time.
They were the oldest fossil found at the time.
They were discovered in Antarctica and Africa.
They were discovered in Antarctica and Africa.
They were found on lands now separated by a wide ocean.
They were found on lands now separated by a wide ocean.
They were found on lands joined together today.
What did Alfred Wegener try to prove with fossil evidence?(1 point)
Responses
that Earth is round, not flat
that Earth is round, not flat
that Earth once had no continents
that Earth once had no continents
that Earth's landmasses move over time
that Earth's landmasses move over time
that Earth is almost 5 billion years old