Answer:
The apparent fit of the eastern coastline of South America and western coastline of Africa
Similarities of plants and animal fossils in South America and some parts of African continent which were separated by a vast ocean
Similarities in the sequence of rock layers of opposite sides of the Atlantic Ocean
It was the finding itself that surprised me most. I was not even aware
that I had lost the key, and I was shocked, and a bit confused at first,
when I saw it there on the floor of the garage.
No, sound waves are invisible to our eyes
He main boat is sending some wave that is reflected back to the sender when it collide with an object ( the frequency differs which is an indication of the distance separating the sender and receiver)