Rock Cycle
What are the three types of rocks?
Igneous, Sedimentary, Metamorphic
If layer A is newer than Layer B, where is layer A?
On top.
What do fossils help us understand within rock layers?
Time, how old a layer is.
What 3 periods are in the Cenozoic Era?
Quaternary, Neogene, Paleogene
How much percent is left after 2 half lifes?
25%
How are igneous rocks formed?
Melting and solidification.
Any layer that is disrupted by magma (igneous rock), is newer or older than the magma (igneous rock)?
Older
How do we select an index fossil?
Seen only 1 time in each outcrop.
What period can we see the earliest birds?
Late Jurassic
How many years for Carbon-14, 2 past lives?
11,400 years.
I am a igneous rock, light in color, non vesicular and glassy. What am I?
Obsidian.
What does Extrusive mean in rock layers?
Outside or on Earth's surface.
What is another way we can tell the age of a layer? Think about catastrophes.
Volcano ash or Meteor Ash
What period in the Mesozoic era do we not have rock samples for?
Early Cretaceous, Early/Middle Triassic
Free 300
Free 300
I am a particle size of 10cm, how much stream velocity is required to move me?
100-500 is fine.
Heat and pressure
Free 400
Free 400
How old can we suggest the beluga whale species to be?
<250 Million Year Old
If Potassium-40 goes through 3 half-lives, what percentage of the original mass will remain?
12.5%
I have a hardness level of 2.5 and have the ability to melt ice. What is my composition?
NaCl or Sodium Chlorine
Explain unconformity.
Erosion and weathering causes rock layers to become uneven or squiggly.
If we found a layer of volcanic ash, how old can we predict the layer to be according to the ESRT.
<65.5 Million Years Old
During the Mesozoic Era, what city can we find the bird species.
Long Island
It took 9,000,000,000 or (9 x 109) for 2 half life years, what radioactive isotope am I?
Uranium-238