When was it?
This planet is 4.6 billion years old.
Earth
Everything we know about dinosaurs comes from these.
are fossils
The word _______ is used for a species that is no longer living anywhere on Earth.
extinct
Fossils are the remains or evidence of an ancient organism preserved in what material?
is rock
Scientists put a _________ on each bone to identify it when they get back to the lab.
number
This animal was the first known invertebrate.
trilobite
This is the word for a dinosaur or other animal that eats meat.
carnivore
A dinosaur has a backbone, so it would be called a _______.
vertebrate
The fossils of a bony structure of an animal's body are found that were used to give the animal support. What was found?
is skeleton
A cast made of __________ can be used to protect a fossil.
plaster
This animal first arrived on Earth 225 million years ago.
dinosaur
This is the word for a dinosaur or other animal that eats plants.
an herbivore
If I discover a dinosaur footprint in the mud, I have discovered an ______________________.
imprint
Sometimes a bone is a fossil, but an impression or track left in a soft surface can also be fossilized. What is this impression or track called?
imprint
This type of scientist studies fossils.
paleontologist
This animal was extinct 65 million years ago.
dinosaur?
This is the word for a characteristic that makes an animal good for living in its environment.
adaptation
A scientist discovers a series of dinosaur footprints and measures the distance between them. What is he/she measuring?
stride
When a fossil is made, first an animal dies and sinks into the sand or mud. Then its muscles and skin rot away and it turns to rock over millions of years. Then the ________changes and part of the fossils shows, making it possible for the fossil to be discovered.
earth
This word is used to describe digging up a fossil.
excavate
The first _____________ arrived 3 million years ago.
human
Concluding that a dinosaur is a meat eater by observing their sharp teeth and claws is an example of an ________.
inference
We can determine a dinosaur's __________ by studying its footprints and stride length.
height
The fossil of a ____________ (kind of dinosaur) would be between 165 million and 80 million years old.
pteranodon
A paleontologist uses _________ when making a model or drawing that is smaller in size than the actual dinosaur.
scale