Terrestrial Plants
What are the terrestrial planets?
Mercury, Venus, Earth and Mars.
What are the the outer planets?
Neptune, Uranus, Saturn, and Jupiter
What are fossils?
A fossil is preserved remains, impression, or trace.
What is actually being dated when age dating a planet?
The surface is being age dated.
What are tar seeps formed by?
petroleum
What is the fourth planet from the sun?
Mars
What is the core of the outer planets made of?
Rock and metals
What type of rock are most fossils found in?
sedimentary rock
How can meteorites be used to help age date the earth?
Meteorites represent some of the most primitive materials in the solar system.
What is Pluto made up of?
methane, rock, and ice
What is the second planet from the sun?
Venus
What are the outer planets also known as?
Gas Giants
Why are fossils rarely found in igneous or metamorphic rock?
heat and pressure
What is the age of the Earth?
about 4 billion years
What is the ring of debris called that separates the outer planets from the inner planets?
The asteroid belt
What planet is closest to the sun?
Mercury
What separates the outer planets from the inner planets?
A ring of debris
How does amber preserve organisms?
Organisms become trapped in the tree sap and are preserved when it hardens.
Approximately what percentage of Earth's surface is less than 200 million years old?
approximately 80%
What are meteorites?
Fragments of asteroids
What is the the third planet from the sun?
Earth
What are their atmospheres made of?
hydrogen and helium
What type of fossilization was also used in ancient civilizations?
mummification
How long has the recycling of Earth's crust been going on?
about 4 billion years
What are shooting stars?
Meteors