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WorksheetsHazel Point Earth History Inv. 4 Test Review
Total questions: 12
Worksheet time: 10mins
If you as the geologist were looking for early human fossils and mammals, rocks from what era would be most interesting to you?
cenozoic
mesozoic
paleozoic
precambrian
If you as the geologist were looking for dinosaur fossils, rocks from what era would be most interesting to you?
cenozoic
mesozoic
palezoic
precambrian
If you as the geologist were looking for trilobites, corals, brachiopods, early fish, and early amphibian fossils, rocks from what era would be most interesting to you?
cenozoic
mesozoic
paleozoic
precambrian
If you as the geologist were looking for evidence of life before the Paleozoic Era , rocks from what era would be most interesting to you?
cenozoic
mesozoic
paleozoic
precambrian
A span of time within an era is called?
generation
century
fossil record
period
A broad span of geological time based on the general type of life existing during that time is called?
period
century
era
generation
Periods and eras are not a set amount of time like a decade or a century, but instead they are based on?
the thickness of rock layers
really important events(changes) in life's organisms
who discovered them
how deep the layers of rock are
When scientists are talking about geologic time, what amount of time are they talking about?
400 million years ago to the beginning of human history
the beginning of human history to now
Earth's origin to the beginning of human history
Earth's origin to now
Geologists really rely on index fossils to do their job. What the most important use of index fossils for them?
They can be used as indicators for determining the age of the sediments used to form rocks.
They can be used as indicators for what kind of life existed long ago.
They can be used to provide evidence of the ingredients of sedimentary rocks.
They can be used to provide evidence of the principle of original horizontality.
What are some reasons that an organism that lived in ancient times may not have been discovered as a fossil? Mark 3 answers.
The fossil has not been found yet .
Scientists have not shared their notes with each other.
It may have already been exposed to the weather and eroded away already.
The organism was eaten by something or decomposed too fast and never got a chance to make a fossil.
Why do geologists use eras and periods instead of days, months, and years to divide geologic time into huge chunks? Mark the 2 best answers.
Eras and periods are more exciting to describe time then days, months, and years.
It isn't practical to use days and months since geologic time covers millions of years.
We don't know what happened on specific days, months, or years.
They don't really have to use eras and periods, but some scientists just choose to use them
Describe the sedimentary environment that eventually led to the formation of Gifford Shale. Mark 3 answers.
It formed in slow moving water like a swamp or marshland
It formed in fast moving water like in a swamp or marshland
Shell and trilobite fossils are found there proving it was under water
made from light sediments such as clay and silt
