声音简介
Dinosaur dig
by Susan H Gray
Where are we going? We packed our clothes. We packed our maps and cameras. We have hammers and paint brushes We even have dentist tools. Where are we going? We're going on a dinosaur dig.
People search for dinosaur, bones along the Red Deer River in Alberta Canada.
We drive to a dig site. It is a place where paleontologists have found many dinosaur bone fossils.
Fossils are the remains of living things from millions of years ago. Paleontologists are the people who study fossils.
This dinosaur skull was found at Dinosaur National Monument in the state of Utah in the US.
We see some huge bones buried in rock. What kind of bones do you think they are?
First, we take pictures of our discovery. Then we get our rock hammers and start chipping at the rock. Soon, the bones break free.
A paleontologist uses a rock hammer to dig out a fossil.
The bones are a mess. Chunks of rock are stuck to them. We use hammers and chisels to knock off the big chunks. Dentist tools, remove the little chunks. Paintbrushes clean off the dirt.
These tools were used to dig up and clean the dinosaur bones in the paleontologists hand.
Some fossil bones break easily, we must protect them. First, we wrap the bones in foil or wet paper towels. Next, we mix a paste that hardens when it dries called a plaster, then we cover the bones with strips of cloth soaked in plaster. The plaster dries with the bones safely inside.
Workers wrap cloth strips soaked in plaster around a large dinosaur bone.
On our dig, we find hundreds of bones. We put the little ones in boxes. We coat the big ones with plaster, We carefully pack everything and return home. Then we will have more work to do.
Drawing maps of where the bones are found helps us identify the bones and put them back together.
We cut away the plaster and clean the bones. Do you think we can put all of these bones together? It's not easy. But we begin building a skeleton. We use wires and rods to hold everything in place. The job takes months. But at last we have a dinosaur
Workers. Build a barosaurus skeleton.
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- 2022-06
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Dinosaur dig by Susan H Gray Where are we going? We packed our clothes. We packed our maps and cameras. We have hammers and paint brushes We even have dentist tools. Where are we going? We're going on a dinosaur dig. People search for dinosaur, bones along the Red Deer River in Alberta Canada.