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Fossils PowerPoint Presentation

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Fossils Presentation Transcript

Slide 1 - Fossils Traces of the past……
Slide 2 - What happened before Fossils are traces of things that happened long ago Plants and animals can become fossils We have only discovered a small number of the plants and animals from the past Fossils are not the original, only a copy
Slide 3 - Plants The most famous example of fossilized plants is petrified wood Ferns, tree leaves, and other plants have been found, too
Slide 4 - Animals The most famous fossils are of dinosaurs There are also fossils of sea creatures and mammals Sometimes many fossils are found in one place because of a flood, earthquake, or other disaster
Slide 5 - How fossils are found Fossils are often found by accident Paleontologists and geologists use clues in the rocks to find good places to hunt for fossils Excavating fossils is hard work, and must be done carefully
Slide 6 - How are fossils made? A fossil is made when a plant or animal is covered quickly with mud or ash The organism’s tissues are replaced over a long period of time with minerals from the soil it was buried in Fossils can be dated by the layer of rock they were found in, or by radiocarbon dating
Slide 7 - Clues to the past Many fossils give us an idea of what life was like long ago Plants give clues about the diet of animals Animals give clues about the availability of plants and the climate when they lived Many clues fit together to make a more complete picture of what the world was like long ago
Slide 8 - Can we ever really know? No matter how many clues we have, we can never really know what life was like long ago We can make an educated guess, and fill in the gaps using what we know about life today It’s fun to imagine what it was like when the dinosaurs lived. Try it next time you feel bored!
Slide 9 - This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com Is home to well over a thousand powerpoints submitted by teachers. This a free site. Please visit and I hope it will help in your teaching