Leonardo's all-round genius brought him face-to-face with problems of understanding the Earth. He saw the Earth undergoing endless change, largely occasioned by the forces of weather and water (both marine erosion of coasts and river erosion of hills). Solid land was constantly decaying into alluvial plains. The creation by rivers of their own valleys, which they then silted up, fascinated
Unit 4
him. Land loss was being compensated for by a steady rise of the continents from the sea (as erosion made them lighter, they were able to rise).
His awareness of the power of water enabled him to recognize fossils as organic remains buried in strata debris, and he pointed to the similarities between fossil and living specimens. He denied that fossils were due to the Flood and privately speculated on the high antiquity of the Earth.
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(CROSSWORD)
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UNIT 5 Rocks of Earth's Crust
A. .
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B. .
(Participle II). Igneous Rocks.
1. .
2. .
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MeUmorphic Rocks.
(Participle II)
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(Participle II) Past Indefinite, .. -:
to use used ()
to discuss discussed ()
to invite invited ()
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2.
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The mine was built many years ago.
It hasn't rained yet.
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The stolen picture was very soon found.
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Unit 5
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The engineers invited to the mine are good specialists.
When burnt, coal produced heat.
Metals do not melt until heated to a definite temperature.
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Having constructed the device in the laboratory,
the engineers tested it at the plant.
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