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  2. Döbereiner's triads - Wikipedia

    en.wikipedia.org/wiki/Döbereiner's_triads

    By 1829, Döbereiner had found other groups of three elements (hence "triads") whose physical properties were similarly related. [2] He also noted that some quantifiable properties of elements (e.g. atomic weight and density) in a triad followed a trend whereby the value of the middle element in the triad would be exactly or nearly predicted by taking the arithmetic mean of values for that ...

  3. Human skeletal changes due to bipedalism - Wikipedia

    en.wikipedia.org/wiki/Human_skeletal_changes_due...

    Increasing brain size has also been significant in human evolution. It began to increase approximately 2.4 million years ago, but modern levels of brain size were not attained until after 500,000 years ago. Zoological analyses have shown that the size of human brains is significantly larger than what anatomists would expect for their size. The ...

  4. Science - Wikipedia

    en.wikipedia.org/wiki/Science

    Science is a systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the universe. [1] [2] Modern science is typically divided into two or three major branches: [3] the natural sciences (e.g., physics, chemistry, and biology), which study the physical world; and the behavioural sciences (e.g., economics, psychology, and sociology ...

  5. Worksheet - Wikipedia

    en.wikipedia.org/wiki/Worksheet

    The form comes with two worksheets, one to calculate exemptions, and another to calculate the effects of other income (second job, spouse's job). The bottom number in each worksheet is used to fill out two if the lines in the main W4 form. The main form is filed with the employer, and the worksheets are discarded or held by the employee.

  6. James while John had had had had had had had had had had had ...

    en.wikipedia.org/wiki/James_while_John_had_had...

    The sentence can be given as a grammatical puzzle [7] [8] [9] or an item on a test, [1] [2] for which one must find the proper punctuation to give it meaning. Hans Reichenbach used a similar sentence ("John where Jack had...") in his 1947 book Elements of Symbolic Logic as an exercise for the reader, to illustrate the different levels of language, namely object language and metalanguage.

  7. Circular reasoning - Wikipedia

    en.wikipedia.org/wiki/Circular_reasoning

    [4] Circular reasoning is often of the form: "A is true because B is true; B is true because A is true." Circularity can be difficult to detect if it involves a longer chain of propositions. An example of circular reasoning is: "Alkaline water is healthy because it results in health benefits, and it has health benefits because it is healthy".

  8. Science, technology, society and environment education

    en.wikipedia.org/wiki/Science,_technology...

    Science, technology, society and environment (STSE) education, originates from the science technology and society (STS) movement in science education.This is an outlook on science education that emphasizes the teaching of scientific and technological developments in their cultural, economic, social and political contexts.

  9. List of superseded scientific theories - Wikipedia

    en.wikipedia.org/wiki/List_of_superseded...

    This list includes well-known general theories in science and pre-scientific natural philosophy and natural history that have since been superseded by other scientific theories. Many discarded explanations were once supported by a scientific consensus , but replaced after more empirical information became available that identified flaws and ...

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