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A presentation conveys information from a speaker to an audience. Presentations are typically demonstrations, introduction, lecture, or speech meant to inform, persuade, inspire, motivate, build goodwill, or present a new idea/product. [1] Presentations usually require preparation, organization, event planning, writing, use of visual aids ...
Chemical structure of 7-hydroxyphenoxazone, the chromophore of litmus components. Litmus is a water-soluble mixture of different dyes extracted from lichens. It is often absorbed onto filter paper to produce one of the oldest forms of pH indicator, used to test materials for acidity. In an acidic medium, blue litmus paper turns red, while in a ...
Recreation is an activity of leisure, leisure being discretionary time. [ 1 ] The "need to do something for recreation" is an essential element of human biology and psychology. [ 2 ] Recreational activities are often done for enjoyment, amusement, or pleasure and are considered to be " fun ".
A variation on the field trip is the "site-based program" or "site-school" model, where a class temporarily relocates to a non-school location for an entire week to take advantage of the resources on the site. As with a multi-day field trip, appropriate overnight camping or lodging arrangements are often made to accommodate the experience.
Chemical reaction. A thermite reaction using iron (III) oxide. The sparks flying outwards are globules of molten iron trailing smoke in their wake. A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another. [ 1 ] When chemical reactions occur, the atoms are rearranged and the ...
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Ecotourism is a form of nature-oriented tourism intended to contribute to the conservation of the natural environment, generally defined as being minimally impactful, and including providing both contributions to conservation and environmental education. [1] The definition sometimes also includes being financially beneficial to the host ...
The pair went on to perform several times together, including at the 2014 Grammy Awards and during Swift’s 1989 tour in 2015. ... Nike's new CEO talks 12-year deal with NBA, WNBA as the sports ...