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Age of the Earth

Earth Science Freshman Unit 2 Age of the Earth

TermDefinition
Cenozoic Era The era of the geological time scale that we are living in
Eon, Era, Period, Epoch Units of time in the geologic time scale (in descending order - biggest to smallest)
Era A period of geologic time larger than a period, but smaller than an Eon. Era's include, the Precambrian, Paleozoic, Mesozoic, and Cenozoic.
Galileo (1564-1642) An Italian who provided more evidence for heliocentrism. He invented a new telescope, studied the sky, and published what he discovered. Because his work provided evidence that the church was wrong, he was arrested and ended up on house arrest for the rest of his life.
Geocentric Model Model of the Solar System with the Earth in the center. Supported by the church during the time of Copernicus.
Geologic Time Scale A timeline based on the development of the earth's physical structure, and it's history.
Geologist A type of scientist who uses radioactive dating to find the absolute age of rocks.
Heliocentric Model A model of the solar system in which Earth and the other planets revolve around the sun. At the time of Copernicus, the church was opposed to this model.
Mesozoic Era time period where dinosaurs, small animals and birds are found.
Nicholas Copernicus He believed in a heliocentric, or sun-centered, conception of the solar system. He argued that the Sun was at the center of the solar system. The planets revolved around the sun.
Paleozoic, Mesozoic, and Cenozoic Large units of time (eras) in the Geologic Time Scale that are identified by changes in life and conditions of the earth.
The age of Earth is estimated to be approximately 4.5 - 4.6 billion years old
What formed the moon? An asteroid collision with Earth
Which planet is closer to the sun? Venus or Earth Venus
Why study fossils? Fossils help scientists learn about plants and animals that existed long ago. They show us how the Earth and our environment have changed through geological time.
Created by: Room261
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