6.1.3: Life in Earth's Past

Classkick: MMM

Multiple Choice

If a scientist found a fish fossil in the desert, what can they infer?

• The water covered the area long ago.

• Today's fish looks the same

• The fish is endangered.

Science Resources Padlet

Multiple Choice

Which of the following statements best characterizes life during Precambrian time?

• characterized by simple, single-celled organisms like bacteria and algae

• marked by the emergence of land-dwelling plants and animals

• defined by the proliferation of mammals and the first appearance of humans

Multiple Choice

During the Paleozoic era, which organisms experienced significant diversification and dominated the oceans?

• marine invertebrates

• mammals

• birds

Reorder

Put the following time periods in order from the oldest to the current.

• Precambrian Time: Although Earth began as inhospitable to life, simple single-celled organisms appeared over time.

• Paleozoic Era: Marine invertebrates dominated the oceans during this time, with new and unique forms of life appearing.

• Mesozoic Era: This was the time of the dinosaurs, as reptiles dominated nearly every habitat on Earth.

• 
  Cenozoic Era: Also known as the Age of Mammals, mammals spread throughout the world during this time and gave rise to the current dominant species, humans.

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