WorksheetsClues to Earth's Past
Total questions: 14
Worksheet time: 12mins
The amount of time it takes for one-half of the original amount of an isotope to decay is known as its________.
Correlation
Half-life
Period
radioactivity
A(n) _____________ forms when the hollowed-out impression of a fossil organism becomes filled with minerals or sediment.
cast
mold
gene
index fossil
The age of an object in relation to the age of other objects.
Absolute Age
Relative Age
Index fossil
Trace fossil
The principle that a sedimentary rock layer is older than the layers above it and younger than the layers below it if the layers are not disturbed.
Law of Superposition
Law of Crosscutting Relationships
Principle of Lateral Continuity
Principle of Original Horizontality
What principle did James Hutton use to determine that Earth was much older than a few thousand years old?
superposition
uniformitarianism
conformitarianism
disconformitarianism
The numerical age, in years, of any object.
absolute age
relative age
space age
old age
Gaps in rock layers are called
unconformities
index fossils
half-lives
none of the above
Which type of fossil is this?
Mold
Cast
Preserved original remains
Trace
