History of Planet Earth
Flashcard
•
Science
•
4th Grade
•
Practice Problem
•
Hard
Wayground Content
FREE Resource
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a key bed?
Back
A layer of rock that scientists use to determine the time period in which it was formed.
2.
FLASHCARD QUESTION
Front
What is the most common type of fossil?
Back
Trace fossil.
3.
FLASHCARD QUESTION
Front
Which period is the most recent?
Back
Cretaceous period.
4.
FLASHCARD QUESTION
Front
What does 'sample' mean in scientific terms?
Back
A small amount of material used for observation.
5.
FLASHCARD QUESTION
Front
What type of rock do most fossils come from?
Back
Sedimentary rock.
6.
FLASHCARD QUESTION
Front
What is sedimentary rock?
Back
A type of rock formed by the accumulation of sediments.
7.
FLASHCARD QUESTION
Front
What is an index fossil?
Back
A fossil that is used to define and identify a particular time period.
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