_____ is a long period of the tectonic history of the Earth several hundred million years long.: ответ на тест 628744 - Английский язык

_____ is a long period of the tectonic history of the Earth (several
hundred million years long).

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Dinosaurs lived on the earth for 135 million years. They appeared 200 million years ago, and they disappeared 65 million years ago. They were the largest animals ever to live on earth, and they ruled the earth for a very long period of time.
Dinosaurs lived in North America, in Africa, and in Europe. Many dinosaurs lived in the water, which helped to hold up their great weight. The early dinosaurs walked on two feet, and they ate meat. The later dinosaurs were larger and walked on four feet. Some of the later dinosaurs ate plants only.
Why did dinosaurs die out? Nobody knows for sure. Probably, a change in the weather made serious problems for them. The plant life and the weather changed. Perhaps the dinosaurs couldn’t change fast enough.
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Dinosaurs …

_____ is a system of points on the Earth’s surface created on the basis of geodetic measurements.

_____ is a device used for measurement of distances.

_____ is a method to define a position of some point on the Earth’s surface.

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Inorganic substances have a definite chemical composition.