Teste e grade A fully answered question and answer
Study the timeline.
Based on the timeline, about how many years ago could the oldest mammalian
organism have lived?
5 million years
200 million years
1.5 billion years
4.5 billion years - (correct answer)b
Which events are most likely if an index fossil is found in a layer at location 1, but the
layer and index fossil are not found at location 2 nearby, which is known to be the same
relative age? Check all that apply.
The layer never formed at location 2.
The locations were too close together.
The organism did not exist at location 2.
The missing layer at location 2 may have eroded.
The layers at location 2 formed much earlier than those at location 1. - (correct
answer)a c d
The image shows sedimentary rock layers.
According to the law of superposition, which layer is the oldest?
, 1
2
3
4 - (correct answer)d
Which method preserves an image of a leaf?
The leaf turns into rock over time.
Tree sap flows over the leaf and preserves it.
Sediment covers the leaf and leaves an imprint on the rock.
As the leaf decomposes, carbon from the leaf is left on the rock. - (correct answer)d
Which statement accurately describes a half-life?
A rock's size is determined by half-life.
All stable and unstable elements have a half-life.
An atom of an element becomes half its original size in a half-life.
A half-life is the time required for half of a radioactive element to decay. - (correct
answer)d
Which statement describes the law of superposition?
Sedimentary rocks were originally in horizontal layers.
In horizontal rock layers, each layer is younger than the one below it.
Rock layers must be in existence before something can happen to them.
Rocks that are not in horizontal layers were shifted by some geologic event. - (correct
answer)b
Study the timeline.
Based on the timeline, about how many years ago could the oldest mammalian
organism have lived?
5 million years
200 million years
1.5 billion years
4.5 billion years - (correct answer)b
Which events are most likely if an index fossil is found in a layer at location 1, but the
layer and index fossil are not found at location 2 nearby, which is known to be the same
relative age? Check all that apply.
The layer never formed at location 2.
The locations were too close together.
The organism did not exist at location 2.
The missing layer at location 2 may have eroded.
The layers at location 2 formed much earlier than those at location 1. - (correct
answer)a c d
The image shows sedimentary rock layers.
According to the law of superposition, which layer is the oldest?
, 1
2
3
4 - (correct answer)d
Which method preserves an image of a leaf?
The leaf turns into rock over time.
Tree sap flows over the leaf and preserves it.
Sediment covers the leaf and leaves an imprint on the rock.
As the leaf decomposes, carbon from the leaf is left on the rock. - (correct answer)d
Which statement accurately describes a half-life?
A rock's size is determined by half-life.
All stable and unstable elements have a half-life.
An atom of an element becomes half its original size in a half-life.
A half-life is the time required for half of a radioactive element to decay. - (correct
answer)d
Which statement describes the law of superposition?
Sedimentary rocks were originally in horizontal layers.
In horizontal rock layers, each layer is younger than the one below it.
Rock layers must be in existence before something can happen to them.
Rocks that are not in horizontal layers were shifted by some geologic event. - (correct
answer)b
