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The scientific method is a logical approach to understanding the world. It starts with an observation, followed by a question. A testable explanation or hypothesis is then created. An experiment is …

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How do biologists follow up on these observations? How can you follow up on your own observations of the natural world? In this article, we’ll walk through the scientific method, a logical problem-solving …

You see that your favourite plant is wilting. You wonder why. Which step in the scientific method does this fall under?

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了解科学方法如何检验假设，探索生物学的科学本质。

In the earlier videos, Sal went through each step of multiplying by decimals. The video "Scientific Notation Example 2" shows how to do that, and then how to adjust the result to be real scientific …

Can you imagine if you had to do calculations with very, very small numbers? How would you handle all those zeros to the right of the decimal? Thank goodness for scientific notation! Created by Sal Khan …

Let's say step four is seeing if you can analyze the potential bias of a source, and I wanna be clear that all sources are biased. I think a common misconception is that if you're looking at a source, it's either …