Why do we find more fossils in sedimentary rock than igneous or metamorphic?

Organisms get trapped as layers are put down.

Sometimes layers of rock look bent or broken. Why?

folding and faulting from an earthquake

Most effective way for a scientist to get the actual age of a rock?

Measure the amount of radioactive elements in it.

Fossil near top and a fossil near the bottom. What can you tell about the age of the fossils.

Lower fossil is older than the upper

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Age of Earth Quiz

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A review of age of the earth

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Questions 12

Answers

1
A method of aging rocks that analyzes the number o half lives it takes to decay
Isotope
Radioactive dating
Absolute aging
Law of superposition
2
The exact age of a rock discovered by radioactive dating
Radioactive dating
Absolute age
Relative age
Law of superposition
3
Why do we find more fossils in sedimentary rock than igneous or metamorphic?
Animals can dig into sedimentary rock and get fossilized
Sedimentary rock burns up and fossilizes as it forms
Sedimentary breaks apart most easily, so fossils are found
Organisms get trapped as layers are put down.
4
Sometimes layers of rock look bent or broken. Why?
lava flows and eruptions
weathering and erosion
Uneven deposition of sediment as they form
folding and faulting from an earthquake
5
This states that rocks on the bottom layers are older than rocks on the top.
Law of superposition
Law of gravity
Law of age
Law of tectonics
6
The theory that the earth is made up of big slabs of rock that float on the mantle
Law of superposition
Plate theory
Plate tectonics
Plate earth theory
7
Which layers are approximately the same age?
B, M
I, H
F, F
R, F
8
Most effective way for a scientist to get the actual age of a rock?
Estimate how much has been worn away
Judge its position on the rock face relative to other rocks.
Measure the amount of radioactive elements in it.
Measure the carbon in it
9
Fossil near top and a fossil near the bottom. What can you tell about the age of the fossils.
Upper is older than the lower
The lower washed down from the top
The fossil is a climbing animal
Lower fossil is older than the upper
10
What major erosion force formed this?
Wind
Glaciers
Air
Water
11
Which layer is oldest?
Shale
Red Shale
Limestone
Granite
12
The age of a rock when compared to other rock layers
Radioactive daying
Law of superposition
Absolute age
Relative Age

Age of Earth Quiz Flashcards | StudBud