Precambrian Era

Precambrian Era Plants and Animals

The animals and plants took a good amount of time to form because of the conditions. The first two things to sprout on the earth were land plants and fungi. A fungi called Lichen was the first fungi to team up with photosynthesizing organisms like cyanobacteria and green algae. The Precambrian animals started to include complex, multi-celled life forms. A animal in this era included stromatolites.

Precambrian Era Atmosphere/Climate

The Precambrian Era is composed into three different parts. The Hadean, Archean and the Proterozoic. The Hadean part of the Precambrian era was the part of earths history when it was forming, so it was all lava and magma, also the atomsphere was poisonous. The Archean's atmosphere and climate were cooling and forming the continents and rocks. The Proterozoic parts was when the volcanoes erupted and the life started to die. The atmosphere during this time was smokey.

Geological Event that started and ended the Precambrian Era

After the sun was created by a cloud of dust.

Small particles drew together, bound by the force of gravity, into larger pieces. This created the earth and the start of earths history and the Precambrian era starts here. It ended with the Cambrian explosion which was the sudden appearance of animals and plants.

The Paleozoic Era

Animals - Animals began with the early invertebrates, such as trilobites and brachiopods, they later developed into early vertebrate fish. Arachnids and insects were developed. The first amphibians were also here and near the end of the era, reptiles were here to became dominant. Trilobites and fish along with amphibians lived in water, reptiles were on land.

Plants

The plants during the Paleozoic Era - Early land plants were just mosses, ferns and then some cone-bearing plants. By the end of the era, seed plants were common

Climate

You may be asking yourself, what was the climate like during the Paleozoic era?

Well the climate was altered by all of the volcanic activity. There was ash and debris floating around every so often. The temperatures were rising and then all of a sudden an ice age came and froze everything. After that there were separate temperature zones and they were fairly warm. this climate allowed for the plants and animals to live.

Timeline

1. First The Cambrian Explosion -  most major animal phyla appeared, as indicated by the fossil record. Lasting for about the next 20–25 million years, it resulted in the divergence of most modern metazoan phyla. Additionally, the event was accompanied by major diversification of other organisms.
2. Diversity of animals
3. The Paleozoic Era ended with the largest extinction event in the history of Earth, the Permian–Triassic extinction event. The effects of this catastrophe were so devastating that it took life on land 30 million years into the Mesozoic Era to recover. Completely wiped out marine biota
4. Pangea formed

Sources:

http://www.columbia.edu/~vjd1/pz_life.htm

http://www.fossilmuseum.net/Paleobiology/Paleozoic_paleobiology.htm

http://www.ucmp.berkeley.edu/paleozoic/paleozoic.php

https://sites.google.com/site/paleoplant/geologic-periods/0-000-0-543-bya-phanerozoic/mesozoic-era

www.livescience.com

www.nearpod.com

Mesozoic Era

Plant and Animal life:

Redwoods, yews, pines, the monkey puzzle tree (Araucaria), cypress, Pseudo Frenelopsis.

Reptiles were dominant.