Layers
Geologic Time Scale
Eras
Fossils
Random Trivia
100
Which layer is the youngest?
B
100
Which division on the geologic time scale is the shortest?
epoch
100
When did mammals become the most dominant organisms?
cenozoic era
100
When scientists use logic to determine the age of one fossil compared to another, they use this type of dating.
relative dating
100
how many hearts does an octopus have?
three
200
What does H represent?
a fault
200
How old do Paleontologists believe the Earth is?
4.6 billion years old
200
During which era did birds evolve for the first time?
mesozoic era
200
According to the law of superposition which layer is the youngest?
A
200
what was the first pixar movie?
toy story
300
Which layer is the oldest?
C
300
True or false: Scientists chose where units of geologic time began and ended based on major changes in life forms at certain times.
true
300
During which era did reptiles and amphibians evolve for the first time?
paleozoic era
300
What was probably the first organism on Earth?
bacteria
300
In what year was the first i phone released?
2007
400
Which layer is the youngest?
F
400
What is the correct order of geologic time using the following frames?
period, epoch, era, eon
eon-era-period-epoch
400
Which era is also known as the era of the dinosaurs?
mesozoic era
400
What does absolute dating tell us?
exact age
400
what are three consecutive strikes in bowling called?
turkey
500
Which layer is the oldest?
E
500
What eon are we currently in?
phanerozoic
500
The ______________ era covers almost 90% of earth's history.
precambrian era
500
Why is the fossil record incomplete?
answers may vary....not all organisms are fossilized, some get eroded away...
500
Dolly was the first cloned animal. what type of animal was she?
sheep