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building up built up having built up to be built up
on the high mountain. under the ocean water. in an airplane. on the surface of the moon,
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explaining the effects that the burning of fossil fuels might have on climate illustrating the effects of carbon dioxide on atmospheric radiation discussing effects that changes in the carbon dioxide level in the atmosphere might have on climate challenging hypothesis about the effects of water vapor and carbon dioxide on climate
had been built, was set up was built, was set up had been built, had been set up was built, had been set up
the functions of carbon dioxide and water the role of water in a growing plant the process of simple sugar formation the synthesis of water with carbon dioxide
to form sugars to derive energy from light to preserve water to combine carbon dioxide with water
forming sugars sustaining woody stems keeping green producing carbon dioxide
The mineral elements will not be absorbed by the plant unless they are dissolved in its root The woody stems contain more' water than the leaves Air existing around the leaf is found to be saturated Only part of the carbon dioxide in the plant is synthesized
much; the other much; any other more; the other more; any other
where what which in which
carbon monoxide oxygen carbon dioxide any gaseous substance
a plant efficiently utilizes most of the water it absorbs carbon dioxide is the essential substance needed for plant development a plant needs more water than is found in its composition the stronger the wind, the more the water vapor loss'
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building up built up having built up to be built up
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