Earth History Review
Flashcard
•
Science
•
8th Grade
•
Practice Problem
•
Hard
+6
Standards-aligned
Wayground Content
FREE Resource
Student preview
15 questions
Show all answers
1.
FLASHCARD QUESTION
Front
What does the fossil record indicate about life forms on Earth?
Back
Most life forms that existed on Earth are now extinct.
Tags
NGSS.HS-LS4-5
2.
FLASHCARD QUESTION
Front
What technological process is used to determine the age of the Earth?
Back
Radiometric dating of rocks in the Earth's crust.
Tags
NGSS.HS-ESS1-5
NGSS.HS-ESS1-6
3.
FLASHCARD QUESTION
Front
How old is the Earth estimated to be?
Back
4.6 billion years old.
Tags
NGSS.HS-ESS1-6
4.
FLASHCARD QUESTION
Front
What do air bubbles in ice cores tell us?
Back
They provide information about the atmosphere in the past.
Tags
NGSS.HS-ESS1-6
5.
FLASHCARD QUESTION
Front
If a radioactive sample has decayed to 25% of its original amount, how many half-lives have occurred?
Back
2 half-lives.
6.
FLASHCARD QUESTION
Front
What is radiometric dating?
Back
A method used to date materials by comparing the abundance of a radioactive isotope to its decay products.
Tags
NGSS.HS-PS1-8
7.
FLASHCARD QUESTION
Front
What is a half-life?
Back
The time required for half of a radioactive sample to decay.
Tags
NGSS.HS-PS1-8
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