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2. Diatomaceous earth - Wikipedia

   en.wikipedia.org/wiki/Diatomaceous_earth

   A sample of food-grade diatomaceous earth Scanning electron micrograph of diatomaceous earth. Diatomaceous earth (/ ˌ d aɪ. ə t ə ˈ m eɪ ʃ ə s / DY-ə-tə-MAY-shəs), diatomite (/ d aɪ ˈ æ t ə m aɪ t / dy-AT-ə-myte), celite or kieselgur/kieselguhr is a naturally occurring, soft, siliceous sedimentary rock that can be crumbled into a fine white to off-white powder.

3. Diatom - Wikipedia

   en.wikipedia.org/wiki/Diatom

   Diatom. For a molecule of two atoms, see Diatomic molecule. A diatom ( Neo-Latin diatoma) [a] is any member of a large group comprising several genera of algae, specifically microalgae, found in the oceans, waterways and soils of the world. Living diatoms make up a significant portion of the Earth's biomass: they generate about 20 to 50 percent ...

4. Diatom filter - Wikipedia

   en.wikipedia.org/wiki/Diatom_filter

   Diatom filter. Diatomaceous earth (DE) filtration is a special filtration process that removes particles from liquids as it passes through a layer of fossilized remains of microscopic water organism called diatoms. These diatoms are mined from diatomite deposits which are located along the Earth's surface as they have accumulated in sediment of ...

5. Frustule - Wikipedia

   en.wikipedia.org/wiki/Frustule

   Frustule. A frustule is the hard and porous cell wall or external layer of diatoms. The frustule is composed almost purely of silica, made from silicic acid, and is coated with a layer of organic substance, which was referred to in the early literature on diatoms as pectin, a fiber most commonly found in cell walls of plants. [1] [2] This layer ...

6. 37 Earth Day Activities for Kids - AOL

   www.aol.com/lifestyle/37-earth-day-activities...

   8. Power Down and Let Mother Nature Be Your Guide. Don Mason/Getty Images. Nature-inspired outings are a great way to get kids to put down their tablets and turn their attention to mother Earth ...

7. Celebrate Earth Day with These Fun Activities for Kids ... - AOL

   www.aol.com/celebrate-earth-day-fun-activities...

   Go on a scavenger hunt. Put together a tally of native plants and animals, then take a hike in a local state park and try to spot all the flora and fauna on your list. After all, Earth Day isn't ...