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Mass vs. Density
updated
Need a refresher?
The mole is equal to exactly 6.02214076 x 1023 and is a fixed numerical value of the Avogadro constant NA, when expressed in the unit mol−1 and is called the Avogadro number.
The mole, symbol mol, is the SI unit of amount of substance. One mole contains exactly 6.02214076×1023 elementary entities. The amount of substance, symbol n, of a system is a measure of the number of specified elementary entities. An elementary entity may be an atom, a molecule, an ion, an electron, any other particle or specified group of particles.
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Diffraction, coined by Francesco Maria Grimaldi in the 17th century, the term refers to the bending of waves around obstacles and openings. The term diffraction comes from the Latin diffringere, which means ‘to break into pieces’, and quite fittingly describes light breaking into different directions. Diffraction is quite different from a related term, refraction, which describes a change in direction, wavelength and speed of waves as they travel from one medium to another.
Learn more about diffraction and how to observe it yourself in our Science is Everywhere episode.
Phenomena-based teaching grounds scientific concepts in a context most students can relate to.
• Provide the vital understanding of ‘why’ a phenomenon occurs and make comprehensive engagement a priority for your lessons.
• Encourage autonomous learning by sparking questions, provoking discovery, and guiding investigations that will prepare them for future STEM education.
• Use cross-cutting concepts that all students have a reference for, simultaneously addressing equity across learning styles and abilities.
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Pavo is an all-in-one platform for school district science programs with 10,000 unique units of content. It is designed for districts, built for teachers, and loved by students! You'll enjoy hands-on experiences, customizable digital content, formative and summative assessments, multi-level analytics reporting, time-saving content searches, easy classroom organization, LTI & Google classroom compatibility, embedded safety instructions. PAVO is reaching every student at every level in all science disciplines.
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Bradley's Potassalicious Potassium Casserole:
A potato or two
Handful of beans
Spoonful of yogurt
One sliced banana
Some whole grains
Little bit of broccoli
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