I change my 4.) to
The era that is sometimes referred to as the age of mammals is the Cenozoic era. Other possible names that could have been used to describe this era is the “Age of Flowering Plants” or the “Age of Insects” or the “Age of Teleost Fish” or the “Age of Birds”. It could be accurately named those because each of them were true diversities of life that happened in the Cenozoic era.
please check my answers + help me improve them.
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1.) explain why earth & other planets were not solid when they formed during the beginning of the precambrian, approximately 4,600 million years ago + what was this particular time period called & why is this time period not really considered a part of earth’s geological history?
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2.) describe the 2 most important events in the history of animal life that occurred at the beginning & at the end of the paleozoic era + list and briefly outline the 6 different periods into which the paleozoic era is divided.
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3.) describe how the triassic period was a transitional time period during the mesozoic era + explain why the boundary between the triassic & jurassic periods is similar to the boundary between the Permian & triassic periods.
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4.) which era is sometimes referred to as the Age of Mammals + list the other possible names that could have been used to describe this era & why
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Answers:
1.) Earth and other planets were not solid when they formed during the beginning of Precambrian times because the planet was 'just born', and was very hot, in fact molten was a cause of it not being solid. Aside from that, lots of volcanic activity was going on, and different 'bodies' collided. Even now the earth is not solid. A thin crust borders a molten mass of liquid rock, that is thousands of miles thick. This particular time period is known as the Hadean eon, and this time peiod is not really considered a part of earths geological history because we don't know much about it.
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2.) The two most important events in the history of animal life that occurred at the beginning and at the end of the Paleozoic era is the dramatic increase in the diversity of multicelled animals, and that almost all marine animals (90%) became instinct.
1.) Permian: about 290 million years ago.
2.) Carboniferous: about 355 million years ago.
3.) Devonian: about 415 million years ago.
4.) Silurian: about 445 million years ago
5.) Ordovician: about 490 million years ago
6.) Cambrian: about 545 million years ago
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3.) The triassic period was a transitional time period during the mesozoic era because of the transition that changed different periods through the era, like the jurassic period. The boundary between the Triassic and Jurassic periods is similar to the boundary between the Permian and Triassic periods because the global climate was not radically changed, even though an extinction of many terrestrial vertebrates happened.
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4.) The era that is sometimes referred to as the age of mammals is the Cenozoic era. Other possible names that could have been used to desire this era is ice age, because of the growth in ice over the arctic during this time, or an organic age because of the growth of flowers and plants. Even an Organism age because of the life that was created through that time, such as the snakes, flowers, and mammals.
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Perfect! :)
Perfect! :)
And on number 2 the last word, what do you mean?
And on number 2 the last word, what do you mean?
You are correct, there are a couple of words you could replace, but you will get it correct ;)
Water cycle- no. B. Unending cycle of water. Evaporates, atmosphere, clouds, rains. Streams lakes, oceans and evaporates, a never ending cycle. They say every molecule of water on earth will go thru the cycle at least once, probably many times. So evaporation is kinda right too
3 answers