Geologic Features
The meaning of the prefix geo-.
Earth
Does changing the number of particles in the air change how quickly particles decay?
NO
Fossil
the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.
The scientific law stating that younger rocks lie above older rocks in undisturbed sequences.
The Law of Superposition
TRUE/FALSE
It's possible for a rock layer to disappear in the layering.
TRUE
Define a Fault.
A fault is break in the Earth's crust.
What is the radioactive form of carbon?
Carbon-14
HALF-LIFE
the time required for any specified substance to decrease by half.
Explain the process of RELATIVE DATING
Process of determining if a rock or event is older or younger than another through comparison
The age of the earth is about
4.5 billion years
Define an INTRUSION.
Molten rock that squeezes into existing rock and cools.
Element WEEHAW has a half-life of 2,000 years. How long will it take for it to decay to half of the original amount?
2,000 years
A parent isotope will decay into the _______ _______.
DAUGHTER ISOTOPE
Using the additional slide...
Which fossil is oldest?
7
TRUE/FALSE
Radioactive decay involves the loss of energy and a particle from the parent isotope
TRUE
What is the TYPE and NAME OF the major geologic feature off the coast of Oregon which is projected to cause a Tsunami in the future.
A FAULT, Cascadia fault zone or Cascadia subduction zone.
You've just discovered element EXPO! This element has a half-life of 500 million years. What PERCENT of the parent isotope will be remaining after it's 2nd half life?
25 %
(atoms of the same element but with different masses)
ISOTOPE
Using the additional slide...
Which fossil is older 3 or 5?
3
Is Americium a real element?
YES
Explain how FOLDING and TILTING would pose a problem to scientists unearthing fossils.
It disrupts the horizontal rock layers, making relative dating near impossible.
If the half-life of Element BLAH is 30 million years, and you begin with 150 grams of BLAH....
How much of the parent isotope will you have after it's 2nd half life?
37.5 grams
Strata
a layer or a series of layers of rock in the ground
The half-life of Carbon-14 is...
~5,700 years
Which era produced the most intense burst of evolution ever known
Cambrian Era