Aging Material 1
Aging Material 2
Half Lives
Rock Cycle
Random
100
What is an index fossil?
An index fossil is an animal that lived over a widespread area in short window of time.
100
What do radioactive elements end up as?
Daughter isotope/element
100
What does it mean when an object completes one half life.
Half of the remaining original (parent) element has decayed into the daughter element.
100
What is needed in order to create a metamorphic rock?
Heat and Pressure
100
The oldest layer is usually found where when looking at a section of Earth's strata (layers)?
The bottom
200
Which method of radioactive dating is most likely to be used to determine the absolute age of animal bones that are less than 45,000 years old?
Radiocarbon Dating
200
The breakdown of radioactive isotopes.
Radioactive Decay
200
80 atoms of a substance goes through 1 half life. How many atoms are remaining?
40 atoms
200
Which types of rocks will most likely contain fossils?
Sedimentary rock.
200
Frost action and abrasion in moving water are examples of this type of weathering.
What is mechanical weathering?
300
The age of a rock compared to the age of another rock. This is not a specific age.
What is relative age?
300
The process that allows scientists to find the absolute age of rocks
Radiometric dating
300
Half life of Element A is 100 years. After 300 years how many half lives have past?
3 Half lives.
300
How is sediment created?
Weathering and erosion.
300
Both collision boundaries and subduction boundaries are which type of plate boundary?
What is a convergent boundary
400
Radioactive dating can be used to date which kind of items?
Inorganic material (soil or rocks)
400
Original Horizontality states...
All material that is deposited will be spread out evenly in horizontal layers.
400
Element A has a half life of 100 years. How much of the parent element is remaining after 400 years?
6.25% Remaining.
400
What is the difference between erosion and weathering?
Weathering= Breaking down of rock.
Erosion= Moving of the broken down material.
400
Order the layers from oldest to youngest.
P, K, M, S, X, R, Erosion A, B, J, F
500
Geological evidence indicates that Earth is approximately 4.6 billion years old. For scientists to be able to explain the origin of life on Earth, they must be able to accurately date organisms. One method that scientists use to date samples is called radioactive dating. What does radioactive dating help scientist accomplish?
Absolute Dating of Rocks and and fossils.
500
Describe a nonconformity
What is the boundary where sedimentary layers were deposited on igneous or metamorphic rock (or different rock types in general)
500
Their is 12.5% left of the parent element remaining. How many half lives have past?
3 half lives.
500
Which is the most common type of rock on Earth?
Igneous rock.
500
B, O, X, D, A, M, Fault J.