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Plants Grew: WALDO H. HEINRICHS, JR., Author of "American Ambassador: Joseph C. Grew and the Development of the U. S. Diplomatic Tradition"
GREW, Nehemiah (1641-1712), English physician and plant anatomist, who made many discoveries concerning the structure of plants.
When asked what made it come out she thought for a while and thei. said that it came out because there was no gravity inside the circle, so the sound floated up. She obviously has some familiarity with the idea of gravity and weightlessness, but had incorrectly applied these ideas to a 'new' situation.
In another example where children are asked to give suggestions to explain phenomena that might be an example of an occurrence that could not be seen (Knaggs 1989, p. 27), Reception children were discussing plants and how they grow. When asked when he thought that plants grew, Donald said 'At night'.
While these spacecraft probed the immediate environment through which the earth travels, on Sept. 7, 1967, Biosatellite 2 lifted a variety of living organisms into space for 45 hours to record the effects of the combination of radiation and weightlessness. Pepper plants, deprived of the gravity that controls their direction of growth, displayed drooped stems and leaves. Wheat seedlings grew sidewise roots, and some grew faster than they do on earth. Embryos of frogs seemed to grow normally. Some kinds of jellylike amoebas, one-celled animals that reproduce by dividing in two, ate faster and divided more slowly in space than they do on earth. Most of the scientists who prepared the experiments said that it would probably require years to interpret all of the results. |
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