Radiometric dating uses the decay of these to measure the age of rocks.
What are radioisotopes?
100
Relative dating is used on this type of rock...
What is sedimentary?
100
The following fossil formation describes which type of fossil....any indirect evidence left behind by an organism (like dino poo)
What are trace fossils?
100
This is the first and longest time period of Earth's history.
What is the Precambrian?
100
The number of years ago that Earth formed.
What is about 4.6 billion?
200
Radiometric dating can only be used to date these 2 types of rocks...
What are igneous and metamorphic rocks?
200
Relative dating relies on this law...
What is the Law of Superposition?
200
The following fossil formation describes which type of fossil....empty pore spaces are filled in by minerals...(ex wood)
What are petrified fossils?
200
During which time period did the first birds come into being on Earth?
What is the Mesozoic Era?
200
This gas was missing from Earth's early atmosphere.
What is oxygen?
300
Radiometric dating uses the of a radioisotope to measure the age of a rock.
What is the half-life?
300
Explain the law of superposition
What is the law of superposition states that the layers of rock closest to the top are the youngest layers and the layers closer to the bottom are the oldest layers?
300
A mosquito trapped in this would form what type of fossil?
What is an amber fossil?
300
This is the era when the first land plants appeared.
What is the Paleozoic Era?
300
This theory about the origin of life explains that life can come from nonliving things.
What is the theory of spontaneous generation?
400
One major advantage of using radiometric dating over relative dating is...
What is it is more accurate?
400
What is one disadvantage of using relative dating over radiometric dating?
What is that it is not as accurate as radiometric dating?
400
An impression of an extinct shell would form this type of fossil...
What is a mold fossil?
400
The longest unit of geologic time lasted how many years?
What is billions (eons)?
400
This theory about the origin of life states that life can only arise from another living organism.
What is the theory of biogenesis?
500
One thing that both radiometric dating and relative dating have in common is....
What is they are both ways to find out the ages of rocks and fossils?
500
Relative dating depends on this in order to identify similarly aged rocks from different locations...
What is the position of the rock layer?
500
List the 4 main steps in fossil formation.
What is
1) the organism dies and is buried in sediment
2) Sediments build up in layers so the organism is surrounded
3) Minerals replace harder structures like bone and shell
4) Erosion can expose buried fossils
500
List the geologic units of time from longest time to shortest time and label how many years they lasted.
What is
1)Epoch (1-9 million years)
2)Period (10s of millions of years)
3)Era (100s of millions of years)
4)Eon (Billions of years)
500
The conditions of early Earth were:
What is it was molten (not solid yet), dangerous gases bc of volcanoes, no oxygen, no life, heavy gases gravitated towards the center of the Earth, extremely hot....