Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
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Αποτελέσματα 1 - 5 από τα 78.
Σελίδα xiv
... XXX - - How does a sailboat use the wind ? Why do kites fly ? Why do airplanes rise ? - Why do windmills turn ? - How has man harnessed water ? How does the sewing machine lighten 343 - - work ? How does a How is cream xiv CONTENTS.
... XXX - - How does a sailboat use the wind ? Why do kites fly ? Why do airplanes rise ? - Why do windmills turn ? - How has man harnessed water ? How does the sewing machine lighten 343 - - work ? How does a How is cream xiv CONTENTS.
Σελίδα 14
... turn the bottle upside down in a pan of water . If the mouth of the bottle is under water , you can remove your hand without the water falling out . If you then blow air into the bottle through a bent tube , you can collect the air in ...
... turn the bottle upside down in a pan of water . If the mouth of the bottle is under water , you can remove your hand without the water falling out . If you then blow air into the bottle through a bent tube , you can collect the air in ...
Σελίδα 14
... turn the bottle upside down in a pan of water . If the mouth of the bottle is under " water , you can remove your hand without the water falling out . If you then blow air into the bottle through a bent tube , you can collect the air in ...
... turn the bottle upside down in a pan of water . If the mouth of the bottle is under " water , you can remove your hand without the water falling out . If you then blow air into the bottle through a bent tube , you can collect the air in ...
Σελίδα 21
... turn the vessel upside down , and remove your hand . Why does not the water fall out ? In what direction does the atmosphere exert pressure in this case ? ( c ) Hold a clean glass vial or other small - mouth bottle . between your lips ...
... turn the vessel upside down , and remove your hand . Why does not the water fall out ? In what direction does the atmosphere exert pressure in this case ? ( c ) Hold a clean glass vial or other small - mouth bottle . between your lips ...
Σελίδα 28
... turning a drill rapidly between his hands . was heated to the kindling tem- perature . Some barbarous peoples do this today ( see Fig . 16 ) . 23. How Does a Fire Burn ? -Watch a fire and see how the flame or glow travels from one part ...
... turning a drill rapidly between his hands . was heated to the kindling tem- perature . Some barbarous peoples do this today ( see Fig . 16 ) . 23. How Does a Fire Burn ? -Watch a fire and see how the flame or glow travels from one part ...
Περιεχόμενα
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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.