• Гідрологія і Гідрометрія
• Господарське право
• Економіка будівництва
• Економіка природокористування
• Економічна теорія
• Земельне право
• Історія України
• Кримінально виконавче право
• Медична радіологія
• Методи аналізу
• Міжнародне приватне право
• Міжнародний маркетинг
• Основи екології
• Предмет Політологія
• Соціальне страхування
• Технічні засоби організації дорожнього руху
• Товарознавство продовольчих товарів

Could water exist on Mercury?

It would appear that Mercury could not support water in any form. It has very little atmosphere and is blazing hot during the day, but in 1991 scientists at Caltech bounced radio waves off Mercury and found an unusual bright return from the north pole. The apparent brightening at the north pole could be explained by ice on or just under the surface. But is it possible for Mercury to have ice? Because Mercury's rotation is almost perpendicular to its orbital plain, the north pole always sees the sun just above the horizon. The insides of craters would never be exposed to the Sun and scientists suspect that they would remain colder than -161 C. These freezing temperatures could trap water outgassed from the planet, or ices brought to the planet from cometary impacts. These ice deposits might be covered with a layer of dust and would still show bright radar returns.

TEXT 8

Читайте також:

1. A) can; B) could; C) can't; D) couldn't; E) be able to
2. B: Couldn’t you move?
3. Can (could)
4. D. Grammar Expansion: Suppositional meaning: Can, Could
5. It’s an animal, It has four legs, We don’t have one in school, It doesn’t usually live in water
6. Land’s waters.
7. Scan passage 2 and speak of the way how scientists utilize the existing knowledge in new scientific investigations. Give examples from the text and your own experience.
8. The cocktail you couldn't mix
9. The problem of fresh water
10. The world water resources
11. Use must not, need not, cannot, may not, dare not, could not, should not, ought not to fill the spaces in the following sentences and state the reason.

Переглядів: 656