Rocks
Fossils
Principles
Principle of Relative-Age Dating
Space
100
Rock layers naturally lay horizontal or vertical?
Horizontal
100
What is a fossil?
remains of ancient living things, old bones
100
What is the principle of original horizontality?
rock layers are deposited in horizontal layers
100
This principle applies to this type of rock formation.
What is superposition?
100
A collection of dust, gas and stars held together by gravity.
What is a galaxy?
200
The rock layer on the bottom are ______, and the rock layers on top are the _______.
DOUBLE JEOPARDY!
oldest & youngest
200
The oldest fossils are on the _________ layer and the youngest fossils are on the _________ top layer
bottom, top
200
What is the difference between relative age dating and absolute age dating?
DOUBLE JEOPARDY!
relative age dating compares two things.
absolute age dating gives the exact age.
200
Find the best index fossil.
What is ammonite?
200
Caused by the earth's tilt on its axis and revolution around the sun.
What are the seasons?
300
If one rock contains pieces of another rock, the rock with the pieces is __________ than the pieces?
younger
300
Simple fossils are on the ______ layer and complex fossils are on the ______ layer.
bottom, top
300
This is an analogy for what principle?
What is inclusions?
300
This geologic principle must be assumed to determine the relative age of E based on the illustration below.
What is the cross-cutting relationship?
300
The two planets farthest from the sun.
What are Neptune and Uranus?
400
What principle states that rocks on the bottom are the youngest and rocks on the top are youngest?
Superposition
400
a fossil that is useful for dating and correlating the strata in which it is found.
What is index fossil?
400
What is the principle of inclusions?
If one rock contains pieces of another rock, the rock containing the pieces is younger than the pieces.
400
The Grand Canyon is mainly found in this US state.
DOUBLE JEOPARDY!
What is Arizona?
400
Earth's shadow blocks the sunlight from hitting the moon.
What is a lunar eclipse?
500
Ancient rocks contain evidence of life form, what is the earliest evidence of life form?
Bacteria
500
What principle are we using when we determine that the oldest fossils are on the bottom and the youngest fossils are on top?
Superposition
500
What is the principle of cross-cutting relationships?
If a feature cuts across another feature, the feature that it cuts across is older.
500
This is the "oldest" in this rock formation based on the illustration below.
What is the letter "I"?
500
The longest and shortest days of the year are called ______.
What is a solstice?