grade 8 (Fossils)

………… is an example of microfossils.

…………….. is the first natural protectorate in Egypt.

El Mokattam mountain was a sea floor due to presence of ………… fossil.

…………… is replica of internal details of old living organism in sedimentary rocks.

Simple ecosystem is …………. by absence of one of its species.

An extinct bird in recent ages is …………..

……………. indicate the sequence of appearance of living organisms from simple to complicated.

Reptiles appear before …………

In petrification , …………… replace the wood material.

All the following are natural disasters that threaten living organisms except ……………