82. Reading Skills Comprehension: Geologists

Geologists

Read the passages given below and answer the questions that follow them:         

Scientists who study the rocks, minerals, landforms and the history of the earth can tell what kind of plants and animals lived on the earth a long time ago. These scientists are called geologists. One way that they are able to do this is by the study of fossils. Fossils may be the actual remains of plants or animals, impressions of them in rock, or the tracks of animals as they walked or crawled.

Most fossils are formed in the waters covering the continental shelves, in warm, shallow, inland seas, and in large swamps that covered large parts of the land in post geologic time. When the animals of these waters die, their remains are deposited on the floor of the water body where the fleshy part of the animal decays. The skeletal portion of the body is partially replaced by minerals and other sediments. If this takes place in just the right manner, a fossil is formed. Since rock sediments are involved in the formation of fossils, it is not surprising that one finds many fossils in sedimentary rock layers. Plant fossils are found in the areas that were once swamped. There are four principal kinds of fossils: original remains, replaced remains, moulds and casts, and impressions.

Word-Meaning: Geologists— scientists who study rocks, minerals and the history of earth  भूविज्ञानी Fossils— remains of plants or animals in rocks चट्टानों में  पोधो और पशुओ के अवशेष Shallow— not deep छिछले Swamps—marshes दलदल  Sediments-  deposits at the bottom,तलछट , अवशाद Moulds— frames, ढाचे

Questions                                                                              

1.What can geologists who study rocks, minerals and the history of earth tell?

2. Who are called geologists?

3. What happens to the remains when animals living in warm and shallow water die?

4. Why are many fossils found in sedimentary rock layers?

5. Find a word in the passage that means ‘imprints’.

Answers

1. The geologists can tell us what kinds of plants and animals lived on the earth long ago.

2. The scientists who study rocks, minerals and history of the earth are called geologists.

3. Their remains get deposited on the floor of the water body.

4. Because sediments are involved in the formation of fossils.

5. Impressions.

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