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In the early 1600s, a scientist planted a willow tree that weighed 5 pounds in 200 pounds of dry soil. He placed it outside and watered it for 5 years. At the end of that time, he observed that the tree had gained 164 pounds 3 ounces, while the soil had

lost just 2 ounces.

In the early 1600s a scientist planted a willow tree that weighed 5 pounds in 200 pounds of dry soil He placed it outside and

Answer :

Final answer:

Jan Baptist van Helmont’s experiment in the 17th century marked a significant advancement in understanding plant growth and led to the discovery of photosynthesis, by recognizing that water contributed to the increase in mass of a growing willow tree.

Explanation:

Jan Baptist van Helmont’s willow tree experiment in the 17th century played a fundamental role in challenging established beliefs about plant growth and the precursor understanding of photosynthesis. By planting a five-pound willow tree in 200 pounds of dry soil and watering it consistently with rainwater or distilled water over five years, van Helmont observed a significant increase in the tree’s weight (164 pounds 3 ounces), while the soil’s weight decreased by only two ounces. Van Helmont’s conclusion that the tree’s mass must come from the water he added was a critical step, although incomplete, as he did not consider the role of gases in the air, specifically carbon dioxide, in the growth process.

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Rewritten by : Barada

a. careful observation, measurements, and inferences from his data.

Which of the following best captures the main worry that the proposed pipeline would undoubtedly raise for many people?

Oil from this pipeline might harm the earth, water, and wildlife if it were to leak.

What was the pipeline's true purpose, anyway?

830,000 barrels in Alberta tar sands crude oil were planned to be transported daily to refineries along the Texas Gulf Coast.From the refineries, oil oil would primarily be shipped abroad rather than to American petrol stations.

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