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2. Fundamental interaction - Wikipedia

   en.wikipedia.org/wiki/Fundamental_interaction

   The gravitational and electromagnetic interactions produce long-range forces whose effects can be seen directly in everyday life. The strong and weak interactions produce forces at subatomic scales and govern nuclear interactions inside atoms. Some scientists hypothesize that a fifth force might exist, but these hypotheses remain speculative.

3. Fifth force - Wikipedia

   en.wikipedia.org/wiki/Fifth_force

   The above experiments search for a fifth force that is, like gravity, independent of the composition of an object, so all objects experience the force in proportion to their masses. Forces that depend on the composition of an object can be very sensitively tested by torsion balance experiments of a type invented by Loránd Eötvös.

4. List of primary education systems by country - Wikipedia

   en.wikipedia.org/wiki/List_of_primary_education...

   Subjects usually taken up include Communication Arts in Mother Tongue (until Grade 3), English (some private schools break this down into Language and Reading) and Filipino, Mathematics, Science, Social Studies (taught in Mother Tongue from Grade 1-Grade 3, Filipino in Grades 4-6), Music, Art, Physical Education and Health (collectively known ...

5. Life on the Genesee: Rochester students set sail, study science

   www.aol.com/life-genesee-rochester-students-set...

   Fifth-grader students from the Rochester City School District took a boat ride on the Genesee River to learn about life in and out of the water as part of their 5th-grade science curriculum.

6. Projectile motion - Wikipedia

   en.wikipedia.org/wiki/Projectile_motion

   Ballistics (from Ancient Greek βάλλειν bállein 'to throw') is the science of dynamics that deals with the flight, behavior and effects of projectiles, especially bullets, unguided bombs, rockets, or the like; the science or art of designing and accelerating projectiles so as to achieve a desired performance.

7. K–12 education in the United States - Wikipedia

   en.wikipedia.org/wiki/K–12_education_in_the...

   There are (as of 2001) about 3.6 million children in each grade in the United States. [8] A fifth-grade class in Paramus, New Jersey, c. 1957. Typically, the curriculum in public elementary education is determined by individual school districts or county school system. The school district selects curriculum guides and textbooks that reflect a ...