Welcome 4th Graders!

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Fossil Click-n-Learn

http://www.maropeng.co.za/images/uploads/fossil_lg.jpg, http://www.soil-net.com/album/Soils_Rocks/slides/Fossil%20Amonite.jpg

Remember how rocks can form layers…

Let’s speed up time and watch them form!

Ta da!

Which layer is the oldest? Click it.

Which layer is the oldest? Click it.

Correct! The layer on the bottom is the oldest.

Which layer is the oldest? Click it.

Oops! Try again. Click the button to go back.

When plants and animals die they may get trapped in the sediment

After long periods of time they can become fossils

Fossils can form in between the layers…

http://lovingthebigisland.files.wordpress.com/2009/06/fossil-fish-1.jpghttp://www.geosociety.org/graphics/gv/PikesPeak/03FossilWasp.jpg

Scientists can look at the animals that live today and compare them to the fossils we find from long ago.

Fossils teach us about the history of Earth…

Let’s Check it Out!

This is another tooth from a Megalodon!

Megalodon

http://www.fossilien.de/seiten/haizaehne/megalodon-.jpg

This shark lived millions of years ago.

WOW! It is bigger than 2 hands together!

Let’s compare Megalodon to the largest living shark today…

More Teeth…

These are teeth are from a Great White Shark

That means Megladon must have been…

http://files.tellmewhereonearth.com/Photos%20Sharks/greatwhites-stratosphere.JPG

HUGE!!!

HumanGreat White Shark

MEGALODON

http://www.fossilien.de/seiten/haizaehne/megalodon_weisserhai.jpg

Have you ever seen a beaver?

Maybe in real life or in a picture?

Let’s check out another fossil

http://static.open.salon.com/files/beaver1231206221.jpghttp://en.wikipedia.org/wiki/File:American_Beaver.jpg

During the Ice Age there was a beaver that looked a little different…

It could grow up to 8 feet long and weigh over two hundred pounds!It’s front teeth were 6 inches long!

http://en.wikipedia.org/wiki/File:Giant-beaver-fieldmuseum.jpg

Wow!

Look how big the skull is!!

http://www.boneclones.com/images/bc-071a-lg.jpg

Gia

nt B

eave

r

Today’s Beaver

Paleontologists can also look for things that are the same from fossils….

This is a fossil of a dinosaur

Does it look like it might have had feathers to you?

http://en.wikipedia.org/wiki/File:Sinornithosaurus_Dave_NGMC91.jpg

YES NO

Paleontologists can also look for things that are the same from fossils….

This is a fossil of a dinosaur

Does it look like it might have had feathers to you?

Paleontologist started to find more and more dinosaur fossils that had feathers….

http://en.wikipedia.org/wiki/File:Sinornithosaurus_Dave_NGMC91.jpg

YES NO

Now they know that some dinosaurs probably had feathers!

http://upload.wikimedia.org/wikipedia/commons/1/1f/Deinonychus_BW.jpg

http://planetdinosaur.com/site/images/stories/dinosaurs/Sinornithosaurus_feathered_dinosaurs.jpg

Weird!!

The first birds probably looked something like this…

http://www.dinosaurfact.info/wp-content/uploads/2009/08/Archaeopteryx.jpg

Paleontologist have used fossils to discover that the birds we have today probably evolved or came from dinosaurs

http://whatbird.wbu.com/img/4/707/image.aspx

http://pelotes.jea.com/AnimalFact/Birds/hkrdtal2.jpg

http://www.muralsforkids.com/images/BlueJay.jpg

LET’S LOOK AT ONE MORE!!

Look how the horses have changed too

Click on the horse that you think is living today

Look how the horses have changed too

Click on the horse that you think is living today

CORRECT! Today’s horses are much bigger than the first horses

Look how the horses have changed too

Click on the horse that you think is living today

Oops! Try again. Remember how small the horse jaw fossil you saw in science class was…

Wow! When we use fossils we can learn a lot about the different animals that used to walk the Earth.

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Fourth Grade Fossils