GROWTH DEVELOPMENT CHILD
FORMATIVE ASSESSMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -Index fossils are fossils that are widespread but only existed for a short period of time. Index fossils help scientists to find the relative age of a rock layer and match it up with other rock layers. Living fossils are organisms that haven’t changed much in millions of years and are still alive today.
Detailed explanation-2: -A useful index fossil must be distinctive or easily recognizable, abundant, and have a wide geographic distribution and a short range through time. Index fossils are the basis for defining boundaries in the geologic time scale and for the correlation of strata.
Detailed explanation-3: -Types of Index Fossils Ammonites: The fossil of ancient marine animals is said to be known as an ammonite index fossil. During the Mesozoic era, they were common (245 to 65 million years ago ).
Detailed explanation-4: -They lived for a fairly short period of time. An index fossil allows a scientist to determine the age of the rock it is in.
Detailed explanation-5: -This common fossil has existed over a very long geological time and still lives today!