The Paleozoic Era is noted for which two changes?

a) rocks were formed
b) the earth heated up
c) people appeared on earth
d) mountains were formed

Just need to know if my answer or right or wrong. Thanks! :)

d

D is correct. The Appalachians, Urals, and Tasmans are several of the mountain chains that were formed.

thanks jen :)

The correct answer is d) mountains were formed.

During the Paleozoic Era, which lasted approximately from 541 to 252 million years ago, there were two major changes that occurred:

1. The formation of mountains: One of the significant geological events during the Paleozoic Era was the formation of mountains. As tectonic plates collided and interacted with each other, they caused the crust to deform, leading to the creation of various mountain ranges around the world.

Regarding the other options you mentioned:

a) rocks were formed: Rocks were not exclusively formed during the Paleozoic Era. Rocks have been forming on Earth for billions of years and continue to form today through various processes like weathering, erosion, and sedimentation.

b) the earth heated up: The Paleozoic Era did not specifically pertain to a period of significant heating of the Earth. However, there were instances of climate changes and fluctuations during this era.

c) people appeared on earth: Humans did not exist during the Paleozoic Era. The first appearance of humans, known as Homo sapiens, occurred much later during the Quaternary Period, which began about 2.6 million years ago.

Therefore, d) mountains were formed is the correct answer for the two changes noted during the Paleozoic Era.