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Britannicas new platform provides content designed and written specifically for early learners.Creating a more engaging and fun learning experience for students,the activities in Britannica Fundamentals align with the content areas children learn in the classroom.Britannica Students - Encyclopedia BritannicaBritannica Kids,a safe and fact-checked online encyclopedia resource created to support learning and homework help for grades 6-8Encyclopædia Britannica,Inc.Corporate Sitein no event shall britannica,its directors,officers,shareholders,parents,subsidiaries,affiliates,agents and licensors,or content providers be liable (i) for any indirect,special,incidental,punitive,or consequential damages arising out of or related to the use,inability to use,performance or nonperformance of the services,even if
Light Waves - Key Terms Types Electromagnetic waves waves made of oscillating magnetic and electric fields,i.e.,radio waves,microwaves,infrared,visible light,ultraviolet,gamma rays and Obsidian Rock,Color,Composition, Uses BritannicaMar 02,2021·Britannica Explains In these videos,Britannica explains a variety of topics and answers frequently asked questions.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.Demystified Videos In Demystified,Britannica hasPlastic plastic Composition,Uses,Types, Facts Plastic definition,any of a group of synthetic or natural organic materials that may be shaped when soft and then hardened,including many types of resins,resinoids,polymers,cellulose derivatives,casein materials,and proteins used in place of other materials,as glass,wood,and metals,in construction and decoration,for making many
Britannica Kids has designed a safe and trusted site that allows kids to be just that kids.Let them loose to explore topics that pique their interest.And those homework assignments? Completed in a snap! All this and more from a trusted brand with nearly 250 years of experience creating reliable content Encyclopædia Britannica.Rhyolite Rock Properties,Composition,Formation,UsesRhyolite; Rhyolite is felsic igneous extrusive rock and it is a fine-grained and dominated by quartz (>20%) and alkali feldspar (>35%).Due to the high silica content,rhyolite lava is very viscous.It is often difficult to identify rhyolites without chemical analysis due to their glassy groundmasses.Many rhyolites consist mainly of glass,and are termed obsidian,or are partially devitrified Some results are removed in response to a notice of local law requirement.For more information,please see here.
Some results are removed in response to a notice of local law requirement.For more information,please see here.12345Nextsoil - Kids Britannica Kids Homework Help
Soil is a mixture of minerals and organic material that covers much of Earths surface.Minerals are bits of rock ,and organic material is the remains of living things that have died.Soil is not as solid as rock.It has many small spaces,called pores,that holdSome results are removed in response to a notice of local law requirement.For more information,please see here.Previous123456Nextmineral - Students Britannica Kids Homework HelpThe most abundant and important of these is apatite,a phosphate of calcium that contains fluorine.An impure form of apatite is the phosphate rock used in fertilizers.A complicated phosphate mineral is monazite,found in beach and river sands.It is a source of the rare-earth metal cerium,which is used in solid-state electronic devices.The gem turquoise is a basic hydrous phosphate of aluminum and steel.SubscriptionStep 1 Choose Your Membership Offer .Step 2 Create Your Account.Step 3 Billing Information
Step 1 Choose Your Membership Offer .Step 2 Create Your Account.Step 3 Billing InformationThe Polymers Degradable PlasticsExplore furtherPlastic Definition of Plastic by Merriam-Webstermerriam-websterPlastic - Wikipediaen.wikipediaPlastic Definition of Plastic at DictionarydictionaryHow Plastics Are Madeplastics.americanchemistryPlastics A simple introduction - Explain that StuffexplainthatstuffRecommended to you based on what's popular Feedbacksteel Composition,Properties,Types,Grades, Facts Steel,alloy of iron and carbon in which the carbon content ranges up to 2 percent (with a higher carbon content,the material is defined as cast iron).By far the most widely used material for building the worlds infrastructure and industries,it is used to fabricatebridge - Kids Britannica Kids Homework HelpA bridge is a structure that allows people and vehicles to cross over an open space.Bridges span,or stretch across,deep pits in the earth,bodies of water,and roads .
Coal Uses,Types,Pollution, Facts Britannica britannica. Coal is black or brownish-black,and has a composition that (including inherent moisture) consists of more than 50 percent by weight and more than 70 percent by volume of carbonaceous material.It is formed from plant remains that have been compacted,coal Coal Uses,Types,Pollution, Facts BritannicaCoal Uses,Types,Pollution, Facts Britannica britannica. Coal is readily combustible,black or brownish-black,and has a composition that,including inherent moisture,consists of more than 50 percent by weight and more than 70 percent by volume of carbonaceous material.DA feldspar Properties,Uses,Types, Facts BritannicaFeldspar,any of a group of aluminosilicate minerals that contain calcium,sodium,or potassium.Feldspars make up more than half of Earths crust,and professional literature about them constitutes a large percentage of the literature of mineralogy.Learn more about the properties and uses of feldspar
Frogs are small animals that can jump very well.Frogs are similar to toads .However,a frog has smooth skin and long legs.A toad has rough skin and shorter legs.granite Composition,Properties,Types, Uses BritannicaGranite,coarse- or medium-grained intrusive igneous rock that is rich in quartz and feldspar; it is the most common plutonic rock of the Earths crust,forming by the cooling of magma (silicate melt) at depth.Learn more about the properties and uses of granite in this article.marble Definition,Types,Uses, Facts BritannicaEncyclopædia Britannica,Inc. videos for this article.Marble,granular limestone or dolomite (i.e.,rock composed of calcium-magnesium carbonate) that has been recrystallized under the influence of heat,pressure,and aqueous solutions.Commercially,it includes all decorative calcium-rich rocks that can be polished,as well as certain serpentines (verd antiques).
Robert Glusic/Getty Images.Starches and sugars,the foods that plants make and store for their own growth,are also the fundamental nutrients that humans and other organisms need in order to live.In North America the chief food plants are cereal grains.(The word cereal comes from Ceres,the Roman goddess of agriculture.) Major cereal crops include corn (maize),wheat,oats,rice,barley plaster Definition,Uses,Types, Facts BritannicaPlaster,a pasty composition (as of lime or gypsum,water,and sand) that hardens on drying and is used for coating walls,ceilings,and partitions.Plaster was used as a medium of artistic expression until the 19th century.Learn more about plaster in this article.plastic - Kids Britannica Kids Homework HelpThere are about 50 main types of plastic.They have countless uses.Manufacturers often use plastics in place of more expensive materials.In nylon stockings,for example,plastic takes the place of silk.In vinyl house siding,plastic takes the place of wood.In many automobile body
polymer family and type density (g/cm 3) degree of crystallinity glass transition temperature (°C) crystal melting temperature (°C) deflection temperature at 1.8 MPa (°C) Thermoplastics; Carbon-chain; high-density polyethylene (HDPE) 0.950.97 high 120 137 low-density polyethylene (LDPE) 0.920.93 moderate 120 110 polypropylene (PP)plastic plastic Composition,Uses,Types, Facts A plastic is a material that can change its shape.Many things are made of plastics,usually because making them to the right shape is easy.There are many types of plastic.Some can be shaped only when they are freshly made; then they become hard.DA 58 PA 6 MOZ Rank 90.Plastic pollution facts and information - Environment plastic plastic Composition,Uses,Types, Facts A plastic is a material that can change its shape.Many things are made of plastics,usually because making them to the right shape is easy.There are many types of plastic.Some can be shaped only when they are freshly made; then they become hard.DA 6 PA 21 MOZ Rank 51 Up or Down Up.Plastic pollution facts and information - Environment
A plastic is a material that can change its shape.Many things are made of plastics,usually because making them to the right shape is easy.There are many types of plastic.Some can be shaped only when they are freshly made; then they become hard.DA 9 PA 97 MOZ Rank 35plastic plastic Composition,Uses,Types, Facts Plastic definition,any of a group of synthetic or natural organic materials that may be shaped when soft and then hardened,including many types of resins,resinoids,polymers,cellulose derivatives,casein materials,and proteins used in place of other materials,as glass,wood,and metals,in construction and decoration,for making many plastic plastic Composition,Uses,Types, Facts Plastic refers to the material used in a wide range of synthetic or semi-synthetic products that incorporate polymers as principal constituents.Plasticity (deformability) during the manufacturing process enables the moulding,extrusion,or compression of the material into solid objects of various sizes and shapes,making plastics adaptable to
The diagram depicts a cross section of three different kinds of mines,along with structural elements of the underground shaft and slope mines.The shaft mine has compartments for a skip hoist,elevators called cages,and service facilities such as ventilation ducts.In a slope mine,the miners also work at different levels,and the ore is sent to the surface in bucket hoists.silicone Definition,Composition,Properties,Uses, FactsSilicone,any of a diverse class of fluids,resins,or elastomers based on polymerized siloxanes,substances whose molecules consist of chains made of alternating silicon and oxygen atoms.Silicones have a wide range of commercial applications,from lubricating greases to biomedical implants.spice and herb Types,Uses, Facts BritannicaJan 24,2021·Spice and herb,parts of various plants cultivated for their aromatic,pungent,or otherwise desirable substances.Spices and herbs consist of rhizomes,bulbs,barks,flower buds,stigmas,fruits,seeds,and leaves.They are commonly divided into the categories of spices,spice seeds,and herbs.
It is widely used in manufacturing tarred ropes and twine and in impregnating hemp fibre for oakum.In pharmacy,it has some slight use as a component of some ointments and antiseptics.Distillates of pine-wood tar,particularly the creosote fraction,are used in metallurgy in the froth flotation processes.