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Ch. 14 earth science test
Terms in this set (25)
Geologic time scale is divided into units based upon types of...
The Alps, Andes, and Himalayas formed in the...
The longest subdivision in geologic time is a(n)...
... existed during the Mezozoic Era.
Angiosperms and birds
Cenozoic Era life-forms include...
Humans, reptiles, & marine mammals
The development of ... factored in the development of complex organisms.
Ozone, oxygen, & cyanobacteria
Today, some scientists think that...
birds evolved from dinosaurs
HOMO SAPIENS probably appeared ... ago.
A life-form in the Precambrian time was...
Life-forms that existed during the Paleozoic Era included...
Fish, trilobites, & reptiles
The end of the Paleozoic Era was signaled by...
Mass extinction of land and sea animals
A life-form that evolved during the ... Era was the dinosaur.
Which trilobite characteristic did not change through time?
Trilobites are index fossils because they...
Changed slowly over time, lived over large areas of the world, & exhibit specific characteristics.
Changes in the trilobite exoskeleton can be attributed to...
Changing environments and competition for survival.
Plate tectonics may affect organic evolution because movement of plates may cause a change in...
Animal life in the Paleozoic Era included all of the following EXCEPT...
Little is known about much about much of Earth's early history because...
Precambrian rocks are changed by heat and pressure, buried deeply, & Precambrian soft-bodied life-forms weren't often preserved as fossils.
... on the geologic time scale are marked by major, striking, and worldwide changes in the type of fossils present.
Only epochs in the ... Era(s) have been given specific names.
The division of Earth's history into smaller units makes up the...
Geologic time scale
If a species can adapt to a changing environment, or ... , its descendants will survive.
The change in environments that may have occurred at the end of the Paleozoic Era may have been caused by...
The ... Formed during the Paleozoic Era.
Humans first appeared in the ... Era
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