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Earth Science Unit 3 Test Study Guide Flashcards | StudBud
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Earth Science Unit 3 Test Study Guide
Earth Science Unit 3 Test Study Guide
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1
TOGETHER the parent material and the daughter material must always equal what percentage?
75%
100%
50%
25%
2
The Law of Inclusions states inclusions are pieces of 1 rock that are contained in another, rock on outside is younger
False
True
3
What is a disconformity?
all sedimentary layers are horizontal with a gap where deposition stopped
horizontal sedimentary rock layers tilt and erode, then deposition occurs
sedimentary rocks deposited over older/eroded metamorphic or igneous rocks
all sedidmentary rocks layers are deposited vertically
4
Which describes the idea of uniformitarianism?
The idea that Earth’s features were formed by catastrophic events
The process shaping Earth’s surface today has always been occurring
All rocks look the same
Rocks will never change
5
An igneous extrusion (magma that exits Earth's surface and cools on top) is older than the layers below it.
False
True
6
What is absolute age dating?
Determining the age by seeing how easy a rock will crumble
Determining the age by counting the rings on a tree trunk
Using radioactive elements to determine the actual age of an object
Determining the age of something through comparison
7
The Law of Superposition states that for horizontal, sedimentary rock layers, the YOUNGER layers are at the bottom.
False
True
8
Which one is NOT a type of unconformity?
angular unconformity
disconformity
undercomformity
nonconformity
9
Index fossils can be used to correlate rock layers around the world to order the relative age of rocks.
True
False
10
Radioactive decay is when the element breaks down to form another element.
True
False
11
What is relative age dating?
Determining the age of something through comparison
Using radioactive elements to determine the actual age of an object
Determining the age by seeing how easy a rock will crumble
Determining the age by counting the rings on a tree trunk
12
What is a nonconformity?
all sedidmentary rocks layers are deposited vertically
all sedimentary layers are horizontal with a gap where deposition stopped
sedimentary rocks deposited over older/eroded metamorphic or igneous rocks
horizontal sedimentary rock layers tilt and erode, then deposition occurs
13
Which describes the idea of catastrophism?
Change in weather
The process shaping Earth’s surface today has always been occurring
The idea that Earth’s features were formed by catastrophic events
Rocks forming too many layers
14
An index fossil is an organism that was widespread and lived for a short period of time.
False
True
15
In an igneous intrusion, sills are always younger than the rocks above or below it.
True
False
16
What is an angular unconformity?
all sedidmentary rocks layers are deposited vertically
sedimentary rocks deposited over older/eroded metamorphic or igneous rocks
horizontal sedimentary rock layers tilt and erode, then deposition occurs
all sedimentary layers are horizontal with a gap where deposition stopped
17
After 1 half life, what percentage of parent material is left?
25%
75%
50%
100%
18
The Principle of Original Horizontality states that layers of sediment are laid down and deposited in horizontal layers.
False
True
19
Which is the correct order from largest division to smallest division of time?
eons, eras, periods, epochs
eons, eras, epochs, periods
epochs, periods, eras, eons
eons, eras, periods
20
An element with the same number of protons and neutrons is a radioactive isotope.
True
False
21
The Principle of Cross - Cutting states that dikes and faults are always older than the rock layers they cut through.
True
False
22
The stable element in radioactive decay is called the "son" product.
True
False
