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  2. Tyndall's bar breaker - Wikipedia

    en.wikipedia.org/wiki/Tyndall's_bar_breaker

    Realisation of Tyndall's bar breaker experiment ready to start. Tyndall's bar breaker is a physical demonstration experiment to demonstrate the forces created by thermal expansion and shrinkage. It was demonstrated 1867 by the Irish scientist John Tyndall in his Christmas lectures for a "juvenile auditory". [1] [2]

  3. Little Albert experiment - Wikipedia

    en.wikipedia.org/wiki/Little_Albert_experiment

    Little Albert experiment. The Little Albert experiment was an unethical study that mid-20th century psychologists interpret as evidence of classical conditioning in humans. The study is also claimed to be an example of stimulus generalization although reading the research report demonstrates that fear did not generalize by color or tactile ...

  4. Elephant's toothpaste - Wikipedia

    en.wikipedia.org/wiki/Elephant's_toothpaste

    Elephant's toothpaste. Elephant's toothpaste is a foamy substance caused by the rapid decomposition of hydrogen peroxide (H2O2) using potassium iodide (KI) or yeast and warm water as a catalyst. [1] How rapidly the reaction proceeds will depend on the concentration of hydrogen peroxide. [2][3][4]

  5. Scientific control - Wikipedia

    en.wikipedia.org/wiki/Scientific_control

    A scientific control is an experiment or observation designed to minimize the effects of variables other than the independent variable (i.e. confounding variables). [1] This increases the reliability of the results, often through a comparison between control measurements and the other measurements. Scientific controls are a part of the ...

  6. Stanford marshmallow experiment - Wikipedia

    en.wikipedia.org/.../Stanford_marshmallow_experiment

    The Stanford marshmallow experiment was a study on delayed gratification in 1970 led by psychologist Walter Mischel, a professor at Stanford University. [1] In this study, a child was offered a choice between one small but immediate reward, or two small rewards if they waited for a period of time. During this time, the researcher left the child ...

  7. John Tyndall - Wikipedia

    en.wikipedia.org/wiki/John_Tyndall

    Its primary feature is, as James Clerk Maxwell said in 1871, "the doctrines of the science [of heat] are forcibly impressed on the mind by well-chosen illustrative experiments." [ 58 ] Tyndall's three longest tutorials, namely Heat (1863), Sound (1867), and Light (1873), represented state-of-the-art experimental physics at the time they were ...

  8. Visual cliff - Wikipedia

    en.wikipedia.org/wiki/Visual_cliff

    Despite a physical surface covering the cliff, the child hesitates to move forward. The visual cliff is an apparatus created by psychologists Eleanor J. Gibson and Richard D. Walk at Cornell University to investigate depth perception in human and other animal species. It consists of a sturdy surface that is flat but has the appearance of a ...

  9. Rutherford scattering experiments - Wikipedia

    en.wikipedia.org/wiki/Rutherford_scattering...

    The Rutherford scattering experiments were a landmark series of experiments by which scientists learned that every atom has a nucleus where all of its positive charge and most of its mass is concentrated. They deduced this after measuring how an alpha particle beam is scattered when it strikes a thin metal foil.

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