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The Scientific Method

 

            
             the smallest unit of life is the cell.
             instructions for development are contained in DNA.
             collectively, all of the chemical processes in a cell are called metabolism.
             producers often obtain energy from the sun.
             homeostasis refers to the ability to maintain a constant internal environment.
             cells in domains archaea and eubacteria lack nucleii.
             plants are multicellular producers.
             an educated guess might be called a hypothesis.
             science is based on evidence.
             philosophy is not a step in the scientific method.
             an atom is the smallest unit of substance that retains the properties of the substance.
             electrons are negative.
             protons are positive.
             neutrons are neutral.
             an atom's nucleus may contain neutrons or protons (no electrons).
             water is a compound.
             a bond with unequal electron sharing is polar.
             Lesson Highlight: Topic 1 - The Scientific Method.
             The Scientific Method.
             Science is based on three principles. These principles establish the framework and limits of science. And they're very straightforward. The first principle is called common perception, and it means we share the same senses. From that idea, it follows all people are likely to agree when making the same observation. Easy enough, right? The second principle is called uniformity of time and space. It means, in part, that the laws of nature observable on Earth are the same everywhere in the universe (uniformity of space). In addition, it means that those laws have always been, and will always be, the way they are now (uniformity of time). That's not too bad either, I think. The last principle is called natural causation, and it means that you're not allowed to invoke any unknowable force as the cause of things. Obviously, these principles limit what science can address the tasks it can be expected to perform well. For example, science is not an effective approach to art or ethics or religion.
             Science is a great approach to solving problems. It can answer questions that haven't been answered before.


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