Worksheetsgen b 2
Total questions: 19
Worksheet time: 15mins
The history of the origin and extinction of species on earth is best discovered by studying the
(a)
are the traces and remains of past life or any other direct evidence of past life.
(a)
the science dedicated to discovering and studying the fossil record and, from it, making decisions about the history of species.
(a)
is a tabular representation of the major divisions of the Earth’s history.
(a)
Scientists developed the time scale by studying ? and ? world wide.
(a)
helped determine the absolute divisions in the time scale.
(a)
Four eras
Precambrian; Paleozoic; Mesozoic; Cenozoic
Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian
Triassic, Jurassic, Cretaceous
Tertiary and Quaternary
Paleozoic
Precambrian; Paleozoic; Mesozoic; Cenozoic
Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian
Triassic, Jurassic, Cretaceous
Tertiary and Quaternary
Mesozoic
Precambrian; Paleozoic; Mesozoic; Cenozoic
Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian
Triassic, Jurassic, Cretaceous
Tertiary and Quaternary
Cenozoic
Precambrian; Paleozoic; Mesozoic; Cenozoic
Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian
Triassic, Jurassic, Cretaceous
Tertiary and Quaternary
65 million years ago…continues through present day
PRE-CAMBRIAN
Paleozoic (ancient life)
Mesozoic (middle life)
Cenozoic (recent life)
245 million years ago…lasted 180 million yrs
PRE-CAMBRIAN
Paleozoic (ancient life)
Mesozoic (middle life)
Cenozoic (recent life)
544 million years ago…lasted 300 million yrs
PRE-CAMBRIAN
Paleozoic (ancient life)
Mesozoic (middle life)
Cenozoic (recent life)
88% of earth’s history
PRE-CAMBRIAN
Paleozoic (ancient life)
Mesozoic (middle life)
Cenozoic (recent life)
Extinction events and appearance of new life forms characterized the divisions among
(a)
Smaller divisions, called ?, characterized by a single type of rock system, make up each Era.
(a)
Some Periods are further divided into smaller time frame called
(a)
Geological time begins with ?. ? covers approximately 88% of Earth’s history.
(a)
is the belief that there was a sudden, apparent explosion of diversity in life forms about 545 million years ago.
(a)
