Before the present theory of plate tectonics, scientists used the hypothesis of continental drift to propose that earth's continents are in motion. which of the following were initially used to support the hypothesis of continental drift? i. the matching shapes of continent edges ii. similar fossils on different continents iii. matching rock types on different continents iv. evidence in the rock record for climate change

answers

question 1 options:

ii and iii only

i and iv only

ii, iii, and iv only

i, ii, iii, and iv

Option (4)

Explanation:

The continental drift refers to the movement of the continents over the earth's surface from one place to another. It was first discovered by Alfred Wegener. He forwarded some pieces of evidence in support of this theory but he was unable to explain the main mechanism behind the continental motion.

Some of this evidence includes-

So, all the above evidence suggested that the earth was once comprised of a single landmass, known as the supercontinent 'Pangaea', which got separated and formed the present scenario.

Later, the concept of 'Plate tectonic theory' came that was able to explain the reason for the movement of the plate. The convection current generates in the mantle, that forces the plates to move. These currents are formed due to the heat supplied from the interior of the earth.

Thus, the correct answer is option (4)- that is I, II, III, and IV.

analyze the map below and answer the question that follows.

what does the map above tell us about the endemity of typhoid fever?

a.

there is greater occurrence of the disease in the western hemisphere.

b.

there is greater occurance of the disease in the northern hemisphere.

c.

countries located in equatorial regions are more likely to have incidents of typhoid fever.

d.

typhoid fever is more rampant among caucasian populations.

they were chasing the bread.