Science
6th - 8th Grade
NGSS covered
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19 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
States that younger rocks lie above older rocks if the layers have not been disturbed
superposition
cross-cutting
unconformity
uniformitarianism
Answer explanation
The principle of superposition states that in undisturbed layers of rock, younger rocks are found above older rocks. This fundamental concept helps geologists determine the relative ages of rock layers.
Tags
NGSS.MS-ESS1-4
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Analyze the seashell found in the white layer. Which statement is true of the rock layer that contains this fossil?
It could also contain a fossil from the bottom layer.
It is older than the layers below it.
It is younger than the layers above it.
It is older than the layers above it.
Answer explanation
The correct statement is that the rock layer containing the seashell is older than the layers above it. This follows the principle of superposition, where younger layers are deposited on top of older layers.
Tags
NGSS.MS-ESS1-4
NGSS.MS-ESS2-3
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Scientists test a mummified corpse and find that it has 50% of its C14 left. How long ago did the mummy die?
17,190
11,460
22,920
5,730
Answer explanation
The half-life of C14 is approximately 5,730 years. If 50% of C14 remains, it indicates one half-life has passed, meaning the mummy died about 5,730 years ago.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the law of superposition?
The age of sedimentary rock not found in the original layers.
Metamorphic rock is younger than the nearby igneous rock.
Sedimentary rock in it's original position is older than layers above it.
Metamorphic rock is older because it was deposited to nearby sedimentary rock.
Answer explanation
The law of superposition states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom, and the layers above are progressively younger. Thus, sedimentary rock in its original position is older than layers above it.
Tags
NGSS.MS-ESS1-4
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Layer B on side #1 (left) is a match to which layer on side #2 (right)?
z
y
w
there is no match
Answer explanation
Layer B on side #1 corresponds to layer w on side #2, as they share similar characteristics or functions, making w the correct match.
Tags
NGSS.MS-ESS1-4
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Length of time for half the atoms of an isotope to decay
Isotope
Half-Life
Radiometric Dating
Absolute Dating
Answer explanation
The term 'Half-Life' refers to the length of time required for half of the atoms in a radioactive isotope to decay. This concept is fundamental in understanding radioactive decay processes.
Tags
NGSS.HS-PS1-8
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How does absolute age differ from relative age?
only absolute dating indicates which rock is older than another
only absolute dating finds the age in years
only relative dating finds the age in years
Answer explanation
Absolute age provides a specific age in years for a rock or fossil, while relative age only indicates whether one rock is older or younger than another. Thus, the correct choice is that only absolute dating finds the age in years.
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