Scientists estimate that if index fossils were deposited during a certain time frame, then the entire rock layer was also deposited at the same time. A scientist finds Trophite fossils. According to the chart above, in what era and period was this rock layer deposited? (a)
8.E.2.2

Quiz
•
Science
•
8th Grade
•
Hard
Norman Mitchell
Used 2+ times
FREE Resource
60 questions
Show all answers
1.
DRAG AND DROP QUESTION
1 min • 1 pt
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Scientists discovered fossils of different organisms in some layers of rock. Organism 5 was discovered in the uppermost layer. The scientists wanted to determine if Organism 5 was related to other organisms found in older layers of rock. They compared physical traits and DNA similarities from all the fossils. Some of their results are shown in the table. Based on the table, which organism is MOST likely an ancestor of Organism 5?
Organism 4
Organism 1
Organism 2
Organism 3
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Scientists theorize that the ancient animal on the left is related to the modern animal on the right and has gone through many changes over time. How did the scientists conclude that the animal changed over time?
by examining fossil records
by learning about natural selection
by studying deposition of sediments
by observing different types of rock formations
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A scientist drew some diagrams of ancestors of elephants based on fossil evidence. Which is the BEST conclusion that can be made from comparing the diagrams?
Elephant species have changed over time.
Ancient elephants were better adapted than modern elephants.
Elephant habitats have remained the same over time.
Elephant fossil evidence is widespread and complete.
5.
DROPDOWN QUESTION
1 min • 1 pt
The picture shows an ammonite fossil on the left. On the right, it shows how the animal may have looked 160 million years ago. According to the ammonite’s characteristics, which modern animals would MOST likely be the relatives of ammonites? (a)
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
This photograph of a canyon wall shows several layers as indicated by the arrows. Which distinction between these rock layers is indicated by the relative positions of the rock layers in the canyon wall?
their rate of erosion
their composition
which types of organisms can live among them
which forces of erosion are acting on them
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The diagram shows the front limbs of four different members of the horse family, based on the fossil record. They are arranged from the oldest to the most recent. Which BEST describes how the front limbs of horses have changed over time?
The toes have reduced in number.
They have gained additional toes.
The bones have become stronger.
The bones have become shorter.
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