Here's a geologic timeline calculator that will help you scale each period to the correct length after you decide how long your timeline will be overall. From - To millions of years ago. The Earth is estimated to have formed about 4. Such vast spans of time are hard for us to comprehend. Even the shapes and locations of the continents, which have been virtually the same throughout all of human history, are now known to have undergone dramatic shifts that influenced ocean currents, animal migration routes, and even the climate.
The Earth has undergone major changes since its beginning, and is very, very old. We've only been here for the wink of an eye.
We are living now in the midst of the largest plant and animal extinction since the end of the Cretaceous, when the dinosaurs died out. The cause, this time, is not asteroid impact or ice age, but us. Given the ways in which humans have been changing the planet, you have to wonder whether we'll last as long as the dinosaurs did! For more detailed information about the geologic timescale , and for a timeline of major biological events , see Wikipedia.
Here are some questions to research using the links to each time period in the table above. How old is the Earth? Describe conditions on the primitive Earth. When did the first life appear? The reason for this is that the lowest number generally makes it easier to understand the measurement. For year the best unit of measurement is years , and the amount is year.
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Login: Community Members. Login: Gundersen Employees. Pedometer Conversion Chart If using a pedometer, use this chart to figure out how many minutes of exercise you did in one day. Lately, I hit the billionth second of my life.
That means I have spent around 31 years, days, 13 hours, 34 minutes, 54 seconds on Earth. Between the year and , I hit this milestone. One billion seconds is equivalent to There are 60 seconds in 1 minute and 60 minutes in one hour.
What is 2 days in minutes? Over the course of an eight-hour workday, the average employee works for about three hours — two hours and 53 minutes , to be more precise. How many kilometers are in a hectometer? In 2 mi there are in. Which is the same to say that 2 miles is inches.
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