Learning Resources LER 2420 manual

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Table of contents for the manual

  • Page 1

    LER 2420 © Learning Resources, Inc., Ve r non Hills, IL (U.S.A.) Learning Resources Ltd., King’s L ynn, Norfolk (U.K.) Please retain our address for future reference. Made in China. LPK 2420-TG U.S. Patent No. D379,315 U.K. Patent No. 2057016 T e acher ’ s Guide ! W ARNING: CHOKING HAZARD - Small parts. Not for children under 3 years. ADVERTEN[...]

  • Page 2

    Precision Sc hool Balance Y our Precision School Balance (LER 2420) will help students explore, develop, and extend their understanding of mathematical and scientific concepts including inequalities, mass, comparisons, the four operations, and order . T he Precision School Balance comes with a 10-piece gram set including tw o 1-gram masses, tw o 2-[...]

  • Page 3

    on one side of the balance and use masses to find out if an object has greater , lesser , or close to equal the mass in a unit weight. Equal Masses Once students ha ve explored measurements that are greater , lesser , or close to the actual mass, encourage them to find the actual mass. Introduce them to the calibration lines that sho w when the bal[...]

  • Page 4

    deux poids de 5 grammes, deux poids de 10 gr ammes, un poids de 20 gramme et un poids de 50 gr ammes, ainsi que ce manuel de quatre pages destiné aux enseignants. Éléments de la balance La Balance scolaire de précision présente de nombreuses caractéristiques qui facilitent son utilisation par les élèv es, tout en étant suffisamment exacte [...]

  • Page 5

    Équilibre des masses Une fois que les élèves ont découv ert que les objets ont un poids supérieur , inférieur ou proche de celui du poids utilisé de l’autre côté de la balance, incitez-les à trouver le poids réel. Montrez-leur les lignes de calibrage qui indiquent quand la balance est équilibrée. Demandez-leur: «Sur quelle ligne est[...]

  • Page 6

    Bestandteile der W aage Ihre Präzisionsschulw aage besitzt viele Eigenschaften, die die Anwendung für die Schüler erleic htern, dessen Genauigkeit jedoch präzise Messungen erlaubt. Dazu gehören: • Der Stabilisierknopf ermöglicht es Ihnen, sc hnelle un genaue Messungen vorzunehmen. Der Knopf stabilisiert den Waagebal ken und hindert die Scha[...]

  • Page 7

    10 7 Erklären Sie den besten W eg, einen Gegenstand zu wiegen. Führen Sie Beispiele an und lassen Sie die Schüler selbst den besten Weg herausfinden, das Gewic ht eines Gegenstandes zu bestimmen. Sie können ihre V ersuche mit den folgenden F ragen unterstützen: • Sollte man mit den kleinen Gewichten beginnen, um einen Gegenstand abzuwiegen? [...]

  • Page 8

    8 9 • Un botón de amortiguamiento que le permite hacer mediciones rápidas y precisas. Este botón estabiliza el brazo oscilante y evita que los platillos oscilen dur ante la medición. • Una guía de calibración que le permite poner a "cero" la balanza siempre que la balanza se muev a o se transporte. • Calibraciones marcadas par[...]