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The science that tries to understand past events is called ______.
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History is not written solely on the basis of ______.
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The calendar we use today is based on the ______.
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The period before the Common Era is known as the time ______.
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Answer the question in one sentence.
Which scientific methods are used to estimate the age of the layers of soil and the remains found in them?
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Answer the question in one sentence.
How is the first century of the Common Era written?
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What is meant by the unilinear division of time?
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What are the units of measuring time?
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Complete the chart given below.
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How were the sun and the planets in our solar system created?
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Find the names of the planets in the box below.
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Arrange the events given below in chronological order.
- Water bodies appeared on the earth’s surface.
- The sun and the planets revolving around it were created.
- Protozoa appeared in water.
- An enormous cloud of hot gases and dust was formed in space.
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Homo is a Latin word which means ______.
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The Neanderthals primarily lived in ______.
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Answer the question in one sentence.
Who is said to have first made tools like the hand-axe?
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Answer the question in one sentence.
What is heredity?
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Give reason for the following.
The Neanderthals became extinct.
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Give reason for the following.
Humans could produce subtle and varied types of sounds.
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Read the clues given below and find the words hidden in the box.

- Humans who stood upright.
- A sound that Neanderthals could make.
- Humans who used their hands.
- Homo sapiens sapiens began to grow this in fields.
- Pieces of stone used to make tools.
- It kept Homo erectus warm, although they could not make it.
- A country in which remains of Homo habilis were found.
- A way of preparing food that Neariderthals used.
- A tool made by Homo erectus.
- Homo sapiens could do this to make pictures.
- Humans could use their hands because they learnt to stand on two of these.
- The country in which remains of Neanderthals were first found.
- These were buried with them when Neanderthals died.
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How did man use the percussion technique?
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