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6 Written questions

6 Multiple choice questions

  1. family referring specifically to humans and several extinct human-like species, some of which were human ancestors, 4.4 million years ago
  2. the period in the geologic time scale beginning about 65 million years ago and continuing until the present day- most fossils from this era. Many mammals, birds, insects, and flowering plants. Humans and their ancestors are in this era
  3. estimating the age of a sample or event in years , usually by measuring the amount of unstable atoms in the sample
  4. prokaryotic cells and then cyanobacteria
  5. the period in the geologic time scale beginning about 248 million years ago and lasting about 183 million years ago- called Age of the Reptiles. Dinosaurs, marine lizards, birds, cone-bearing trees, and starting flower bearing plants.
  6. a period in the geological time scale beginning when the Earth originated, 4.6 million years ago, and ending when complex organisms appeared, about 540 million years ago- no oxygen in the atmosphere and all creatures lived in the ocean to escape harmful UV rays. Prokaryotes only exsisted. They were anaerobic. Then, cyanobacteria (photosynthetic organisms) began to produce oxygen that seeped through the water, into the atmosphere, and formed the ozone layer. Eukaryotes began to develop.

5 True/False questions

  1. Eukaryotea cell that contains a central nucleus and a complicated internal structure

          

  2. What causes an era on the geological time scale to end?mass extinction of most of a species

          

  3. Neanderthalsa species of hominid that lived in Europe and Western Asia from 230,000 years ago to about 30,000 years ago

          

  4. Prokaryotea cell that contains a central nucleus and a complicated internal structure

          

  5. Paleozoic Erathe period in the geologic time scale beginning about 65 million years ago and continuing until the present day- most fossils from this era. Many mammals, birds, insects, and flowering plants. Humans and their ancestors are in this era

          

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