Science

when wind makes a wind tower's blades turn, there is a generator that makes electricity out of it.

Making observations

To state whether their hypothesis was supported by the data.

D) Number 2 because the experiment was repeated and the results were always the same

Ethanol comes from corn, we all know that. But the problem created by using ethanol as a biofuel is that it puts a greater demand on corn stocks which can and will go to the point where demand is much higher than supply. Corn is also grown as a foodstuff for humans and a feedstuff for livestock. So when you get a demand for ethanol AND a demand for corn as a food and feed, problems like availability for ethanol production become very difficult and more of an ethical and food issue than anything. Only so much corn can be grown every year and corn can be grown only in certain areas, so using ethanol as a biofuel alone is an inconceivable feat in itself. Other biofuels or alternative energy sources for vehicles must be conceived in order for corn to be freed up for use as food.

Biodiesel

The treated couch is the experimental.

green energy source

Empiricism .

analyzing the data.

science cannot answer philosophical questions

the cost of nuclear fuel was low - Apex

Collecting data

Making a prediction

The U.S. government increased its investment in researching alternative fuel sources.

Forming a hypothesis

Americans felt less safe after the accident at Three Mile Island. - APEX.

Forming a hypothesis

Using more air conditioning in the summer - apex