问题描述：
i don't know how to do?the questions about science~help~
State the field of science for each of the following:
1.the making of artificial rain.
2.sources of petroleum.
3.the production of plastic from crude oil
4.the ability of penguins to live in very cold places.
5.the use of solar energy to generate electrical energy.
State the field of science for each of the following:
1.the making of artificial rain.
2.sources of petroleum.
3.the production of plastic from crude oil
4.the ability of penguins to live in very cold places.
5.the use of solar energy to generate electrical energy.
问题解答：
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