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  2. Parts-per notation - Wikipedia

    en.wikipedia.org/wiki/Parts-per_notation

    In science and engineering, ... In time measurement it is equivalent to about 5 minutes out of a year; ... ppm, ppb, and ppt". [5]

  3. Fifth grade - Wikipedia

    en.wikipedia.org/wiki/Fifth_grade

    Fifth grade (also 5th Grade or Grade 5) is the fifth or sixth year of formal or compulsory education. In the United States, this is mostly the last grade of primary school, but for some states, it could be the first year of middle school. Primary school generally goes from Kindergarten and ends in fifth or sixth grade. Students in fifth grade ...

  4. Earth science - Wikipedia

    en.wikipedia.org/wiki/Earth_science

    Earth science or geoscience includes all fields of natural science related to the planet Earth. [1] This is a branch of science dealing with the physical, chemical, and biological complex constitutions and synergistic linkages of Earth's four spheres: the biosphere , hydrosphere / cryosphere , atmosphere , and geosphere (or lithosphere ).

  5. Word of the year - Wikipedia

    en.wikipedia.org/wiki/Word_of_the_year

    In addition, an Unwort des Jahres (Un-word of the year or Most Unpleasant Word of the Year) has been nominated since 1991, for a word or phrase in public speech deemed insulting or socially inappropriate (such as "Überfremdung"). [79] Similar selections are made each year since 1999 in Austria, 2002 in Liechtenstein, and 2003 in Switzerland.

  6. List of years in science - Wikipedia

    en.wikipedia.org/wiki/List_of_years_in_science

    0s: 1st century in science; 100s: 2nd century in science; 200s: 3rd century in science; 300s: 4th century in science; 400s: 5th century in science; 500s: 6th century in science; 600s: 7th century in science; 700s: 8th century in science; 800s: 9th century in science; 900s: 10th century in science; 1000s: 11th century in science; 1100s: 12th ...

  7. Key Stage 5 - Wikipedia

    en.wikipedia.org/wiki/Key_Stage_5

    Key Stage 5 is a label used to describe the two years of education for students aged 16–18 and at sixth form or college. In England, Wales and Northern Ireland, it is aligned with previous Key Stages in the National Curriculum .