Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
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Αποτελέσματα 1 - 5 από τα 34.
Σελίδα xi
... copper obtained ? How are gold and silver found ? - What is 22 - carat gold ? men find precious stones ? What is coal ? our building stones ? Does man ever make stones ? Exercises . PART IV SCIENCE IN THE HOUSEHOLD How do What are 178 ...
... copper obtained ? How are gold and silver found ? - What is 22 - carat gold ? men find precious stones ? What is coal ? our building stones ? Does man ever make stones ? Exercises . PART IV SCIENCE IN THE HOUSEHOLD How do What are 178 ...
Σελίδα 6
... copper and washboards of zinc ; why clothes dry so rapidly on one day and so slowly on another day . There is ever so much more that we can find out in our homes , but let home be only the beginning of our field of study . Let us find ...
... copper and washboards of zinc ; why clothes dry so rapidly on one day and so slowly on another day . There is ever so much more that we can find out in our homes , but let home be only the beginning of our field of study . Let us find ...
Σελίδα 26
... copper , zinc , and lead smelters in which , by the aid of fire , these metals are prepared for our use ; the furnace fires that produce the steam of the locomotive and steam- ship . Then , too , we think of the joyous bonfire of our ...
... copper , zinc , and lead smelters in which , by the aid of fire , these metals are prepared for our use ; the furnace fires that produce the steam of the locomotive and steam- ship . Then , too , we think of the joyous bonfire of our ...
Σελίδα 41
... copper ? 7. Covering wood with an oxide protects it against fire . Why ? 8. Let an empty " tin " can rust without losing any material . Does the rusted can weigh less , or more , than the original can ? Why ? Burning Gas CHAPTER VI ...
... copper ? 7. Covering wood with an oxide protects it against fire . Why ? 8. Let an empty " tin " can rust without losing any material . Does the rusted can weigh less , or more , than the original can ? Why ? Burning Gas CHAPTER VI ...
Σελίδα 112
... copper were hung side by side , and it was possible to see distinctly that the copper ball moved over toward the lead ball . So we 112 CHAPTER XII Force and Energy • What holds the solar system together? Why does.
... copper were hung side by side , and it was possible to see distinctly that the copper ball moved over toward the lead ball . So we 112 CHAPTER XII Force and Energy • What holds the solar system together? Why does.
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Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
acid ammonia animals bacteria becomes blood body boiling bones bottle breathing bulb burning called candle carbon dioxide carry cause cells cerebrum changed cloth coal cold color cool copper covered digestive dish dry cell earth electric current epidermis evaporate feet fire flame force give glass grow heat hydrochloric acid hydrogen inside iron kerosene kerosene lamp lamp layers learned light rays limewater liquid lungs machine magnet manganese dioxide material melted metal milk moon mouth move muscles needle nerve nitrogen nonconductor object oxide oxygen pass phosphorus piece pipes plants pole potassium chlorate pounds pressure produce pull pump push rock rubbed sal ammoniac salt seeds skin soil solution starch steam stomata stove substances sugar sulphur sunlight surface temperature tissue trees tube vibrations warm weather weight wind wire wood yeast zinc
Δημοφιλή αποσπάσματα
Σελίδα 509 - Measures of Weight 10 milligrams (mg) =1 centigram eg 10 centigrams =1 decigram dg 10 decigrams =1 gram g 10 grams =1 dekagram Dg 10 dekagrams =1 hektogram Hg 10 hektograms =1 kilogram Kg...
Σελίδα 402 - THIS is the forest primeval. The murmuring pines and the hemlocks, Bearded with moss, and in garments green, indistinct in the twilight, Stand like Druids of old, with voices sad and prophetic, Stand like harpers hoar, with beards that rest on their bosoms...
Σελίδα 509 - Measures of Length 10 millimeters (mm.) . . . . =1 centimeter cm. 10 centimeters =1 decimeter dm: 10 decimeters =1 meter m. 10 meters =1 dekameter Dm. 10 dekameters =1 hektometer Hm. 10 hektometers =1 kilometer Km.
Σελίδα 509 - Area. 100 square millimeters (sq. mm.) =1 sq. centimeter (sq. cm.). 100 square centimeters = 1 sq. decimeter (sq. dm.). 100 square decimeters =1 sq. meter (sq. m.). 3. Cubic Measure, or Volume. The unit of volume is the liter, which is 1 cu. dm., or 1,000 cc 1,000 cubic millimeters (cu. mm.) = 1 cubic centimeter (cc). 1,000 cubic centimeters =1 cubic decimeter (cu. dm.). 1 cubic decimeter = 1 liter (1.). 10 liters =1 dekaliter (dl.). 10 dekaliters =1 hectoliter (hl.). 10 hectoliters = 1 kiloliter...
Σελίδα 105 - The known principal planets, in order of their distance from the Sun are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.
Σελίδα 339 - Levers are divided into three classes: in the first class, the fulcrum ' is between the power and the weight ; in the second class, the fulcrum is...
Σελίδα 86 - The wind arrows show the wind to be moving in a direction opposite to the movement of the hands of a watch (counterclockwise) when it is laid, face up, on the map.
Σελίδα 243 - ... north pole of one magnet will attract the south pole of another, and the south pole of one will attract the north of another ; but the north...
Σελίδα 53 - The oxygen is carried by the blood to all parts of the body...
Σελίδα 331 - In the second class of levers th'e fulcrum is at one end and the power at the other, with the weight between them.