Kepler's Laws
Planets orbit around the Sun in elliptical orbits according to this law.
Kepler's First Law
This planet is third from the Sun and located in the habitable zone of our solar system.
Earth
This process describes how Earth and life have changed and grown together over time.
Coevolution
This material found in red beds and banded iron formations formed from the reaction of free oxygen in the air with iron in rocks.
A planet is moving fastest when it is at this point in its orbit.
Perihelion
Rocks can be classified as sedimentary, igneous, or metamorphic based primarily upon differences in their
Origin
This process began releasing oxygen into the atmosphere about 2.7 billion years ago.
Photosynthesis
According to Kepler's Second Law, planets sweep out equal areas in equal this.
During this period of time about 500 million years after the solar system formed, the Earth and other inner planets were being struck with asteroids.
The Late Heavy Bombardment
Earth's fossil record shows evidence that more complex life-forms probably emerged from less complex life-forms through this process.
Evolution
These processes break up and move rocks to different locations.
Weathering, erosion, and deposition
These types of events can wipe out 70, 80, or even up to 90% of life in a very short period of time.
Mass extinction events
According to Kepler's Third Law, the greater distance a planet is from the Sun, the greater its this.
Orbital period (length of year)
In this type of model, the Sun, other stars, and the Moon orbit around the Earth.
Geocentric
This protective layer in the atmosphere is formed by three oxygen molecules bound together.
Ozone layer
This planet’s orbit around the Sun is most nearly circular.
Venus (0.007)
This process measures the amount of a decayed isotope in order to determine the age of an object.
Radiometric dating (radioactive dating)
This life-form appeared first, and is our earliest undisputed evidence of life from about 3.5 billion years ago.
Stromatolite
Oxygen was very toxic and killed off these types of organisms who were unable to utilize it to produce energy.
Anaerobic
This equation attempts to estimate the number of intelligent civilizations we can communicate with.
The Drake Equation