Category 1
Fossil remains of previous life forms can be preserved in all of the following except. . .
A. Sedimentary Rocks
B. tar sands
C. ice
D. Lava pits
lava pits
Fossils are. . .
alive or dead
dead
What is a sudden change to earth called?
A. gradualism
B. catastrophism
C. uniformitarianism
B. catastrophism
How do we know Virginia use to be underwater?
Fossils of fish are found here.
How old is earth?
4.6 billion years
_____________ is found in all living and previous living things? All things that have this in them is considered to be organic.
carbon
What type of rock would fossils be found in?
sedimentary
Which of these would most likely result in a fossil?
A. A clam is buried in the mud.
B. A clam was eaten by a fish
C. A clam washed up on the beach
A. a clam is buried in the mud.
Paleozoic, mesozoic, and cenozoic are classified as ________________.
Eras
Which three of these are correct about index fossils?
A. contradicts the law of superposition
B. were widespread geographically
C. Useful with relative aging of rocks
D. Existed for short periods of time
B, C, and D
Explain how volcanic ash could form animal molds?
The ash covers the animal before and hardens around it before the animal decays
A change in species over time can be concluded by . . .
A. inference of scientists
B. the fossil record
C. repeated experimental trials
B. The fossil Record
What is the law that states that oldest rock layers are beneath newer rock layers?
Law of Superposition
Name the method used to tell if one rock layer is older than another one.
Relative dating
What is the main thing that had to happen before animals could live on earth?
Enough plants had to be present to give off enough oxygen to supply the atmosphere with enough oxygen for the animals to be able to breathe.
Name the time scales from longest to shortest time periods.
Eons, eras, periods, epochs
Explain why earth didn't have much oxygen millions of years ago.
Lack of plant life to produce the oxygen
What is the type of fossil found all of over the world and only lived folr a short time?
index fossil
Put these in order from oldest to newest species.
fish
humans
bacteria
birds
bacteria, fish, birds, humans
The radioactive decay of material can be used to determine the age of fossils. This is called ______________.
absolute dating
How do scientists know what gases made up the atmosphere millions of years ago?
They collected air from the air pockets in glaciers that have been frozen for a long time
The era known as the age of reptiles?
mesozoic
The era known as the age of fish.
paleozoic
The era known as the age of mammals.
cenozoic
What caused the dinosaurs to become extinct?
Asteroids.meteors hitting earth.