Which of the following is least likely to become a fossil? (Won't become fossilized)
The type of fossil where all minerals replace all or part of an organism.
Where were fossils containing FRESHWATER fish formed?
deep in ocean water
in a hot spring
in an underground reservoir
in a lake
Fossils found in the top layer of rock are the ___________________.
What can cause mass extinction?
disease and/or starvation
all of the above
Which is most likely to contain fossils?
What are the preserved remains, traces, or evidence of once living organisms called?
Hardened tree sap that preserves the remains of an insect is called _______________
a mold fossil
a cast fossil
a tar fossil
What happened during the Cambrian Explosion?
the supercontinent broke apart
an asteroid collided with Earth
a great number of different organisms evolved
mammals spread into every environment on Earth
What do we call scientist who study organisms that lived long ago?
A fossil that dissolves and leaves a hollow area is called _______________.
An insect preserved in amber and a tree that has turned to stone are examples of:
What do you call a fossil that helps determine the age of the rock layer?
an index fossil
an hourglass fossil
a radioactive fossil
Which animal is an invertebrate?
What is formed when minerals seep or fill in a mold?
What do you call the change in a species over time?
Fossils provide evidence for all of the following EXCEPT for:
changes in Earth's surface
how Earth originally formed
how Earth's environments have changed over time
how groups of organisms have changed over time
What will happen to a species that does NOT have the traits needed to survive?
Why do scientists think the dinosaurs became extinct?
too much rain
new predators killed the dinosaurs
meteorite/asteroid hit the Earth