What could the relative age of two rocks tell you about them?
a. One rock is 10,000 years old, and the other is 8,000 years old.
b. One rock is older than the other.
c. They both have fossils in them.
d. One rock is closer to the surface than the other.
What would a geologist do if he/she wanted to determine the age of rock layers at a given location using relative age?
a. Find some information on the approximate age of local landforms.
b. Find the relative age of one rock at the given location.
c. Find the relative and absolute ages of all rock layers at that location.
d. Find a fossil in a sedimentary rock layer nearby.
How does folding change rock layers?
a. Folding can alter the composition of rock layers.
b. Folding can change the position in which rock layers appear.
c. Folding always moves younger rock layers to the surface.
d. Folding does not change rock layers.
Sometimes, layers of rock are overturned so frequently that the youngest rock layer may appear at the bottom, which is reverse of what is ordinarily expected.
a. True
b. False
My answers: b, b, b, a
All of your answers are correct.
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For the question "What could the relative age of two rocks tell you about them?" your answer is correct.
a. One rock is 10,000 years old, and the other is 8,000 years old.
b. One rock is older than the other. (Correct)
c. They both have fossils in them.
d. One rock is closer to the surface than the other.
To determine the age of rock layers using relative age, a geologist would employ various techniques. Let's evaluate the options provided:
a. Find some information on the approximate age of local landforms.
b. Find the relative age of one rock at the given location. (Correct)
c. Find the relative and absolute ages of all rock layers at that location.
d. Find a fossil in a sedimentary rock layer nearby.
The correct answer is b. To determine relative age, a geologist would typically compare the rock layers to establish a relative sequence. This can involve identifying key fossils, which further helps establish the relative age of the rocks.
For the question "How does folding change rock layers?", your answer is incorrect. The correct answer is:
b. Folding can change the position in which rock layers appear.
Folding occurs when rocks are subjected to intense pressure or stress, leading to the bending or deformation of rock layers. This can cause the original position of the layers to change, resulting in a modified arrangement.
Finally, for the statement "Sometimes, layers of rock are overturned so frequently that the youngest rock layer may appear at the bottom, which is reverse of what is ordinarily expected", your answer is incorrect. The correct answer is:
b. False
This statement is false. In undisturbed rock layers, the oldest rock layer is generally found at the bottom, with successively younger layers stacked above it. This sequence adheres to the principle of superposition, which states that in a series of undisturbed sedimentary rocks, the oldest layers are at the bottom, and the youngest layers are on top.