The geological clock: a projection of Earth’s 4,5 Ga history on a clock (“MA” = a million years (Megayear) ago; “GA” = a billion years (Gigayear) ago) Ga History, Time Scales, Earth History, Fractions, File Geology Clocks, Events, Life Science, Geology Time, Billion Years
Sometimes, discovering when something happened only begins to make sense when it’s seen in relation to other events. This is particularly easy to do if the total time is shown in the form of a clock. The age of the Earth is about 4.5 billion years – on the clock, 1 second equals approximately 52,000 years and one hour is 187.5 million years.
Earth Backgrounds for Research Projects
Layers of Earths Atmosphere Oooh. I like this graphic too. Maybe I'll use it in 3 years when we do the atmosphere again.