15. Why is earth called the "blue planet"?
16. What are constellations?
17. Who are historians?
18. What do you mean by the term 'tributaries'?
19. What are the different ways to find out about the past?
20. List the difference between manuscripts and inscriptions.
Answers
Answer:
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Explanation:
15 Earth is called blue planet due to presence of water on it..
16 A constellation is a name given to a group of stars in the sky that make up a certain pattern. ... There are 88 named constellations
17 historian is a person who studies and writes about the past and is regarded as an authority on it
18 Tributary is a small river that flows into a larger river
19The following are the ways to find out about the past:
Historical records: historical records such as inscriptions, travelogue, epics and other official documents etc. give us vital information about our past. 2. Monuments: monuments constructed by various rulers provide us with very significant information.
20.Manuscript and Inscription are the sources of historical knowledge. The manuscript is a handwritten or a manually typewritten document, whereas inscription is the writings on relatively hard surfaces such as stone or metal.
answer:
15.Planet Earth has been called the "Blue Planet" due to the abundant water on its surface. Here on Earth, we take liquid water for granted; after all, our bodies are mostly made of water. However, liquid water is a rare commodity in our solar system.
16.a group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure.
17.A historian is a person who studies and writes about the past and is regarded as an authority on it. ... If the individual is concerned with events preceding written history, the individual is a historian of prehistory. Some historians are recognized by publications or training and experience.
18.a stream that flows to a larger stream or other body of water. a person or nation that pays tribute in acknowledgment of subjugation or the like.
19.Historical records: historical records such as inscriptions, travelogue, epics and other official documents etc. give us vital information about our past. 2. Monuments: monuments constructed by various rulers provide us with very significant information
20.Manuscripts were usually written on palm leaf, or on the specially prepared bark of a tree known as the birch, which grows in the Himalayas, while inscriptions were engraved either on a stone surface or on bricks or metals.
these r the ans of above que