Use this to study our Unit on the Age of The Earth and The Geologic Time Scale
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What law do we apply that tells us that the layers of rock on the bottom of a sequence of rock layers are the oldest? | The Law of Superposition
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| By examining the above rock layers and comparing one rock layer to the next to get the general age of the rock is called what | relative age
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| If scientists wanted to get the exact year of the rock or fossils found within the rock layers they would use? | radiometric dating
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| Earth is about how old? | 4.6 billion years old
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| Dinosaurs went extinct about how many years ago? | 65 million
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| The theory that the same forces that are shaping our Earth now were shaping our Earth in the past is known as: | The Law of Uniformitarianism
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| The amount of time it takes for ½ a sample of radioactive element to decay into another form | Half life
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| Which era were the dinosaurs around in? | Mesozoic
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| What were the predominant features of the Paleozoic Era? | Invertebrates
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| What event is thought to have wiped out the dinosaurs? | Meteroid
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| Why do we think a meteroid wiped out the dinosaurs? | Becuase radioactive elements that are normally only found in space are found in rocks layers that are 65 million years old.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
stacylatham
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