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A record of the geologic events and life forms in Earth’s history
geologic time scale
Describes an organism that no longer exists anywhere on Earth
extinct
Process by which plants use water, carbon dioxide and energy from the sun to make food
photosynthesis
Animals that have a backbone
vertebrate
Animal that lives part of its life on land and part of its life in water
amphibian
Animal that is warm blooded, has fur or hair and produces milk through glands for their young
mammal
One of the units of geologic time into which eras are divided
periods
The single landmass that broke apart 225 million years ago and gave rise to today’s continents
Pangaea
The first Era of Geologic Time ; “ancient life”
Paleozoic
The current era in which we live in; “recent life”
Cenozoic
Process by which all the different kinds of living things have changed over time
evolution
Animals that do not have a backbone
invertebrate
Animals that have scaly skin and lay eggs
reptiles
One of the three long units of geologic time
eras
Subdivisions of periods in geologic time
epochs
Period of time that marks the beginning of Earth’s history
Precambrian Time
