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WorksheetsHistory of Life on Earth
Total questions: 17
Worksheet time: 9mins
This picture is an example of a ...
body fossil
trace fossil
permineralized fossil
cast/mold fossil
I was out fossil hunting and was lucky enough to find a fossil. Based on the geologic column, about how old would you expect my fossil to be?
25 million years (mya)
50 million years (mya)
75 million years (mya)
100 million years (mya)
The series of time divisions that mark Earth's long history.
Index fossil
Fossil record
Geologic column
Geologic timescale
A process that determines the exact age of a rock layer based on comparing the amounts of unstable, radioactive particles to stable particles.
relative age dating
index fossils
geologic timescale
radiometric dating
Which mass extinction took place towards the end of the Paleozoic era?
dragons
The Permian extinction.
rhinos
How long ago did the dinosaurs become extinct?
a century ago
60 mya
Dinosaurs became extinct 65 mya.
Relative Dating is:
Uses the radioactive material in rocks to determine when rocks were formed or the age of the rock. The radioactive elements in rocks decay slowly over time – known as radioactive decay.
Looks at the comparative depths of fossils in rock to ascertain which are oldest and which are most recent.
What group of organisms replaced dinosaurs after their extinction?
Insects
Mammals
Amphibians
Squids
The age of birds and mammals is the ___________ era.
Paleozoic
Mesozoic
Cenozoic
Early mammals were ___________ and ___________.
large, diurnal
large, nocturnal
small, nocturnal
small, diurnal
The history of planet Earth is subdivided into several eras, marked by the life at the time. Which era contained ONLY prokaryotic forms of life?
Pre-cambrian
Palezoic
Mesozoic
Cenozoic
A scientist who studies fossils is called a ...?
Forensic scientist
Rock scientist
Geologist
Paleontologist
True or False: Evidence from the fossil record shows that species change gradually over time.
True
False
