The globe below shows what Earth's landforms may have looked like 750 million years ago. (Make sure to watch the globe spin all the way around, you can also put your mouse on the globe and scroll to zoom in and out).
Compare the globe above to the one below, which shows what Earth's landforms may have looked like 20 million years ago. ( Make sure to watch the globe spin all the way around)
Question 1
1.
Visit the website dinasaurpictures.org to navigate to a model of earth 750 million years ago and 20 million years ago. (Or look at the globes above)
What did Earth look like 750 million years ago compared to 20 millions years ago? How did the land formations change?
Question 2
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Question 3
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Question 4
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Question 5
03:56
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Question 6
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Question 7
05:43
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Question 8
06:34
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Question 9
08:18
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Question 10
09:55
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Question 11
11:33
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HS-ESS2-1
Question 12
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Question 13
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Question 14
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Question 15
15.
The Geologic Time Scale is used for absolute dating in earth's history.
There are 4 major divisions in the Geologic Time Scale.
The longest division are __________, which can be broken down into __________.
These can be divided into __________.
The smallest major divisions are __________
Question 16
16.
Question 2
2.
The layers closer to the surface must be __________ than the layers below. The oldest fossils would be found on the __________
Question 3
3.
Scientists use _______ to help compare the ages of rocks
Question 4
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Question 5
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Question 6
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Question 7
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Question 8
8.
The Cambrian explosion at the beginning of the Paleozoic era produced diverse and complex organisms in the __________
Question 9
9.
The Mesozoic Era is known as the age of __________
Question 10
10.
The Cenozoic era saw the rise of __________
Question 11
11.
How would you describe what Geologic Time is in your own words?
Fossils
Evidence of past life preserved in rock
Gives us clues to the past climate, environment, and abiotic factors in an area
Body Fossils: Actual remains of an organism
Trace Fossils: Not an actual part of the organism, but shows evidence of activity
Categorize these fossil examples as body or tracel fossils.
Corprolite (fossilized feces)
Early mammal skeleton
Dinosaur footprints
Dragonfly
Ammonite shell
Dinosaur egg shells
Worm burrowing
Body Fossil
Trace Fossil
Relative Dating
Putting events in sequential order
Fossils and layers of rock are compared to the age of other fossils and rocks
Fossils of organisms that were sensitive to temperature changes help define key events
Here's an example of using relative time. Put these events in the order of Mrs. Winer's typical day.
Ate lunch
Woke up
Ate dinner
Went to bed
Ate breakfast
Absolute Dating
Putting events in chronological order with dates
Radiometric dating on the rock surrounding the fossils gives an approximate age
Measures the radioactive decay of element isotopes
Here's an example of using absolute time. Match the times these events would occur in a typical day for Mrs. Winer
Ate lunch
6:30 am
Woke up
8:00 am
Ate dinner
12:00 pm (noon)
Went to bed
6:00 pm
Ate breakfast
9:30 pm
What part of the geologic time scale are we currently living in?
