What is the theory of continental drift? what did alfred wegener notice that him to create this theory?

Continental drift was a theory that explained how continents shift position on Earth's surface. Set forth in 1912 by Alfred Wegener, a geophysicist and meteorologist, continental drift also explained why look alike animal and plant fossils, and similar rock formations, are found on different continents

Alfred Wegener came up with the idea in 1912 that continent are slowly drifting around the earth. However, at first his theory was rejected.
Wegener noticed that the continents looked as though they might fit together like puzzle pieces (he would later name the original supercontinent Pangea). He also noticed that there were matching geologic features and rocks on different continents, as well as matching fossils of land animals. These animals could not have migrated across the ocean.

Hope that helps!!

3.1 s

Explanation:

we can assume that this motion has a horizontal projectile motion.

projectile motion happens when  an object is subjected to only gravity. Gravity acts to influence the vertical motion of the projectile, it makes a  vertical acceleration.  

The horizontal motion of the projectile is the result of the constant velocity of the object.We assume no acceleration in the horizontal direction.  

applying motion equations

where

s - distance

u - initial velocity

a-acceleration

t - time

s = ut + (1/2)at²

→ 165 = 50t + 0 (as no acceleration is in horizontal direction)

t = 3.1 s