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This 0 page Class Notes was uploaded by Bradley Brown DDS on Sunday November 1, 2015. The Class Notes belongs to FREF106 at Miami University taught by Staff in Fall. Since its upload, it has received 32 views. For similar materials see /class/233319/fref106-miami-university in French at Miami University.
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Date Created: 11/01/15
590011 3L Worms at Work f t To teach students that food scraps and yard trimmings Compost can be made into compost instead of being thrown away Vermicom posting Castings Decompose J Activity Description Bedding Organic Students will create a compost bin using worms and food scraps and monitor changes in the bin over time Setup l hour Followup l5 minutes to T hour on an occasional basis Computation Observationclassitication Motor skills 3 Materials Needed Large plastic bin about 8 to T6 inches deep with holes in the bottom for aeration Tray tor underneath the bin Two bricks or other large sturdy objects 9 to T4 pounds of neWspaper One bag of potting soil l pound of red worms Food scraps such as bread vegetables fruits eggshells grains coffee grounds tea bags Do NOT include meat bones mayonnaise tish peanut butter candy or nontood items Tarp or drop cloth Bucket or other carrying container Household gloves optional Copy of Vermicomposting Data Sheet for each student 909mmmaeaommmoocinnmueaommmoemmmaeaommmoocinnmueaommmoemmmaeaommmoocunmueaommmoea Sh the use of worms the need for and use of organic waste and other vocabulary words During the course of this lesson intorm students of good and bad foods to use in CO ter to compost than to throw food scraps away The Quest or Less Step 1 Explain to the class what compost is and how it is made refer to the Teacher Fact Step 2 Place bin on top of two bricks and put tray under bin Step 3 Have the students tear each sheet of newspaper lengthwise into strips that are l to 3 inches wide and place half of the pile in eet titled Composting on page l09 Discuss the bin Step 4 Have the students multiply the num ber of pounds of newspaper by 3 to determine the total amount of water needed a pint of mpostIng as well as the reason why It Is bet Wafer Weighs a pound and 0 gallon of Water Unit 2 Chapter 2 Composting 127 is 128 weighs 8 pounds Then add half of The waTer To The bin wiTh newspapers Step 5 Sprinkle Two handfuls of soil and The resT of The newspaper and waTer Have The sTu denTs mix The conTenTs well and disTribuTe evenly in The bin Step 6 Genle place The worms on Top of The bedding spreading Them evenly Keep The bin uncovered so The sTudenTs will see The worms moving down inTo The bedding To avoid lighT Step 7 Use The aTTached daTa sheeT To record all acTiviTies surrounding The worm bin including The daTe The bin was seT up The number of worms or pounds of worms added To The bin and The number of people conTribuTing food scraps number of people in The class For The remainder of sTeps for This acTiviTy have sTudenTs record The daTe and day food is added includ ing The Type of food and iTs weighT as well as The amounT of waTer added The composT bin should always remain moisT Step 8 Use food scraps ThaT you broughT from home or ThaT you asked sTudenTs To bring from home or save from school lunch and have sTudenTs add Them To The bin Food can be added daily weekly or monThly Do noT over load The sysTem bury food relaTively evenly amongsT The differenT quotploTsquot On The daTa sheeT insTrucT sTudenTs To keep Track of how much food They are providing The worms and where iT is placed see diagram on daTa sheeT Step 9 Place a sheeT of newspaper over The Top of The bin To prevenT flies from circulaTing near The area STore The bin in a cool place ouT of direcT sunlighT and keep The lid Tigthy shuT Step 10 Have sTudenTs check The bin Tre quenle as They add food scraps To see The changes ThaT occur ATTer a period of 3 To 6 monThs depending on The size of The conTainer mosT of The food and bedding will be Trans Tormed inTo worm casTings The nuTrienT rich wasTe maTerials ThaT worms excreTe Step 1 1 In order To harvesT The composT or humus for use if you choose To you musT change The bedding and Temporarily remove The worms Spread ouT a Tarp or drop cloTh in an open area and dump ouT The enTire conTenTs of Step 11 How To Harvest Compost Divide compost Scoop off the Put the castings into a materials into several material from The container to carry out to coneshaped piles top of the piles The garden larger on The bottom UniT 2 Charmer 2 ComposTing The QuesT Tor Less The bin Have sTudenTs help you divide The maTerials inTo several coneshaped piles larger on The boTTom so The worms will burrow inTo iT and avoid The lighT DirecT sTudenTs To scoop off The maTerial from The Tops of The piles and puT The casTings inTo a conTainer To carry ouT To The garden see illusTraTion on The previous page for help RepeaT This procedure unTil mosT of The composT is harvesTed Step 12 Have sTudenTs puT worms back in The bin along wiTh any uncomposTed food and old bedding Your class can sTarT a new sTock of bedding and add in any addiTional worms To begin The process again Step 13 CreaTe a garden in which To use The composT as a soil amendmenT or use The com posT on The schools beds or lawn NOTE OTher criTTers may make Their way inTo The composT bin Many are beneficial including mold bacTeria sow bugs beeTle miTes whiTe worms snails and slugs flies round worms and millipedes You do NOT wanT The following in your bin however flaT worms ground beeTles cenTipedes anTs and pseudo scorpions If you find any of These organisms sTarT over AssessmenT 1 Ask sTudenTs To define and describe decomposiTion 2 Ask sTudenTs why iT is beneficial To composT iTems insTead of Throwing Them away The Quesf for Less Ask The sTudenTs To make observaTions abouT The worm bin each week Do smaller pieces of food Tend To break down fasTer Than larger ones WhaT does The composT smell like WhaT organ isms do They noTice Are The worms mulTiplying Have sTudenTs Take The TemperaTure of The worm bin once a week To deTermine The vari aTions ThaT occur while food is composTed Use a ThermomeTer ThaT can measure up To l70 F Have The sTudenTs creaTe bar graphs showing The increase or decrease in Temper aTure over Time M LeT sTudenTs use a pH paper To TesT The acidi Ty of The worm bin once a week Does The pH change based on The foods ThaT are added Have The sTudenTs keep a record of The foods ThaT are added and The pH and charT a graph showing The correlaTion If The soil is Too acidic The worms may Try To leave The bin Try adding a liTTle lime A Give sTudenTs gloves To genle examine The criTTers inside The bin once a week You mighT also examine a sample of The soil under a microscope aT The beginning of composTing bacTeria are presenT ThaT help break down The food laTer larger organisms such as sow bugs and round worms play a larger role ObTain an idenTificaTion guide To inverTe braTes and insecTs and see how many you can idenTify Have sTudenTs draw The differenT kinds of criTTers and discuss The differences in each number of legs body parTs funcTion Unif 2 Chqpfeh 2 Composfing 129 H es g g 0 Student Handout Date bin was set up Name Vermicomposting Data Sheet Number 0 worms or pounds 0 worms added to bin Number 0 people contributing Food scraps on a regular basis Date Day Weight Type Amount Buried of ned 019 ood a water in site added added added Notes It you run out of spaces get an extra copy of this sheet from your teacher On the back of this paper draw the worm bin including its dimensions and assign plots to cer tain sections so you can track decomposition of food placed in each numbered area Harvest date 77 7 7 7 Total days777777777 Total weight of food buried 7 7 Weight of uneaten food leftover Average weight buried per day 7 7 7 Example p103 quotPier I 2 3 Flat Flt Plot 51 g 7 Plot 39 1 l 39 1 1 Plot I 39l l I 8 I 31 A I