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  2. List of Cambridge International Examinations Ordinary Level ...

    en.wikipedia.org/wiki/List_of_Cambridge...

    Science (Physics, Chemistry) — Yes — link: CIE 5125 Science (Physics, Biology) — Yes — link: CIE 5126 Science (Chemistry, Biology) — Yes — link: CIE 5129 Combined Science: Yes Yes Yes Cannot be combined with syllabuses 0608, 0610, 0620, 0625, 0652, 0653 & 0654 , 5054, 5070, 5090, 5096 & 5131 (O Level) link: CIE 5130 Additional ...

  3. Timeline of plesiosaur research - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_plesiosaur...

    A specimen of Trinacromerum was discovered in a roadside exposure of the Greenhorn Formation in Kansas. The specimen is now catalogued as KUVP 5070. [31] 1938. A large pliosaur skeleton was found on the banks of Russia's Volga River. However, the specimen was damaged during the excavation and only the skull and chest region were successfully ...

  4. AP Chemistry - Wikipedia

    en.wikipedia.org/wiki/AP_Chemistry

    The 2014 AP Chemistry exam was the first administration of a redesigned test as a result of a redesigning of the AP Chemistry course. The exam format is now different from the previous years, with 60 multiple choice questions (now with only four answer choices per question), 3 long free response questions, and 4 short free response questions.

  5. How to make sure texts and calls are encrypted after the FBI ...

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    The knit jacket that shoppers say is better than 'JCrew cardigans' is on sale for $34

  6. Corgi Puppy Mistakes Ornaments For Toy Balls During Her Very ...

    www.aol.com/corgi-puppy-mistakes-ornaments-toy...

    The little Corgi dog has already had a blast stealing wrapping paper tubes, attending the local holiday parade, and breaking into her family's stockings. She briefly scared her family after eating ...

  7. Are your plastic kitchen utensils toxic? An alarming study ...

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    Black plastic kitchen utensils. A December 2024 study in the journal Chemosphere incorrectly calculated the amount of potentially toxic flame retardants that could be present in some black plastic ...

  8. Analytical chemistry - Wikipedia

    en.wikipedia.org/wiki/Analytical_chemistry

    Analytical chemistry has been important since the early days of chemistry, providing methods for determining which elements and chemicals are present in the object in question. During this period, significant contributions to analytical chemistry included the development of systematic elemental analysis by Justus von Liebig and systematized ...

  9. Litmus - Wikipedia

    en.wikipedia.org/wiki/Litmus

    Litmus paper after being used. The main use of litmus is to test whether a solution is acidic or basic, as blue litmus paper turns red under acidic conditions, and red litmus paper turns blue under basic or alkaline conditions, with the color change occurring over the pH range 4.5–8.3 at 25 °C (77 °F). Neutral litmus paper is purple. [2]