prep 2 , unit 3 , lesson 1 , part 2

When mud fills up the shell cavities and solidify, then shell decomposes......... is produced.

• a solid mold

• a cast

• a petrified wood

• an amber fossil

Is the cake considered as a solid mold, why?.........

• Yes, because it carries the same external details of the mold.

• Yes, because it carries the same internal details of the mold.

• No, because it carries the same internal and external details of the mold.

• No, because it doesn't carry any details of the mold.

To obtain a fossil of any organism, all the following can expect to be available for it except that it ...........

• has a hard skeleton.

• rapidly burying after death.

• has a medium protects it from.

• has a soft body.

Fossils are important for all the following except

• determination of sedimentary rocks age.

• studying the kinds of metals.

• petroleum exploration.

• figuring out the paleoenvironment.

Are the dinosaur's eggs considered as examples of petrified fossils?

• Yes, because minerals replace whose organic matter part by part.

• Yes, because they carry the internal details of the eggs.

• No, because they aren't considered as fossils.

• No, because they show the remains of dinosaur after its death.

What happened when minerals replaced the wood of the tree's stems and trunks, which are older than 35 million years?...........

• A complete body fossil has been formed.

• A petrified fossil has been formed.

• A trilobite fossil has been formed.

• A dinosaur tooth fossil has been formed.

.......... fossils are the fossils of organisms that had lived for a short period of time in the past and had a wide geographical range, then became extinct.

• Petrified

• Index

• Ferns

• Coral

Not all the fossils are considered as index fossils and that is because they are characterized by............

• long range of time and limited geographical range.

• short range of time and wide geographical range.

• long range of time and wide geographical range.

• short range of time and limited geographical range.

.........fossils are found in the limestone rocks of El-Mokattam mountain.

• Ferns

• Coral

• Nummulites

• Index

.............fossils indicate that the environment where they lived was a hot and rainy tropical environment.

• Ferns

• Coral

• Nummulites

• Archaeopteryx