Children's Encyclopedia1976 |
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Resultats 1 - 3 de 13.
Pàgina 13
... surface weigh only a sixth of what they do on earth . And this includes spacemen . A Very Hot World The spacemen had also to wear specially cooled suits . Without them they would have burned up in the fierce heat on the moon's surface ...
... surface weigh only a sixth of what they do on earth . And this includes spacemen . A Very Hot World The spacemen had also to wear specially cooled suits . Without them they would have burned up in the fierce heat on the moon's surface ...
Pàgina 14
... surface . Black Gold Oil , like coal , was formed a long , long time ago from the remains of animals and plants . These animals and plants lived in the seas and were buried in layers of sand and mud . After millions of years heat and ...
... surface . Black Gold Oil , like coal , was formed a long , long time ago from the remains of animals and plants . These animals and plants lived in the seas and were buried in layers of sand and mud . After millions of years heat and ...
Pàgina 18
... surface of the seas . Men are going deeper and deeper into the strange , dark depths . Skin divers ( 1 ) can go down more than 200 feet . Divers wearing helmets and with air pipes to the surface ( 2 ) can can reach below 500 feet ...
... surface of the seas . Men are going deeper and deeper into the strange , dark depths . Skin divers ( 1 ) can go down more than 200 feet . Divers wearing helmets and with air pipes to the surface ( 2 ) can can reach below 500 feet ...
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