Science Lesson 3a Extinction--10/14/09

14 terms by carmmore 

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fossil

Evidence of a living thing that lived long ago is called a(n) _____________.

tracks

By observing the patterns of dinosaur ______________, scientists learned how the dinosaurs walked.

rocks

Most fossils are found in _______________.

soft parts

When an organism dies, its _______________ quickly decay or are eaten.

mold

The hard parts of dead organisms are more likely to become a ____________ fossil.

amber

Tree sap can harden into ____________ and preserve an entire organism.

imprint

Some fossils form when an organism presses into a soft surface, leaving a(n) ___________.

change

When an entire group of organisms die, it is probably because they did not adapt to ____________.

disappear

If an organism does not meet its needs after a change, it can slowly __________.

classify

Scientist _____________ living things according to how many of their kind are left.

endangered

If only a few of its kind are left, the species is ______________.

extinct

When no members are left, the species is _______________.

extinct

Scientists try to keep animals from becoming endangered or ____________ by moving the animals to places where they are safe and protected.

protected

Scientists try to keep animals from becoming endangered or extinct by moving the animals to places where they are __________.

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