Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
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Σελίδα xi
... coal ? our building stones ? Does man ever make stones ? Exercises . PART IV SCIENCE IN THE HOUSEHOLD How do What are 178 CHAPTER XVIII Acids and Alkalies . 191 Do we use science in the home ? Where are acids found ? What makes a ...
... coal ? our building stones ? Does man ever make stones ? Exercises . PART IV SCIENCE IN THE HOUSEHOLD How do What are 178 CHAPTER XVIII Acids and Alkalies . 191 Do we use science in the home ? Where are acids found ? What makes a ...
Σελίδα 26
... coal mines and petroleum wells , of the great conflagrations that have swept over cities like Rome , London , Moscow , Chicago , Boston , and San Francisco . We ought also to think of the quiet fires of the home : a burning match ...
... coal mines and petroleum wells , of the great conflagrations that have swept over cities like Rome , London , Moscow , Chicago , Boston , and San Francisco . We ought also to think of the quiet fires of the home : a burning match ...
Σελίδα 27
... coals each evening for the next day's fire . If the coals " went out , " as they sometimes did , some one ( usually a child ) had to go out in the frosty morning to " borrow fire " of a neighbor . The glowing coals were carried in ...
... coals each evening for the next day's fire . If the coals " went out , " as they sometimes did , some one ( usually a child ) had to go out in the frosty morning to " borrow fire " of a neighbor . The glowing coals were carried in ...
Σελίδα 28
... it gives off heat ; a fourth , that there is usually some smoke . A fifth thing is that after solid fuels , like coal and wood , no longer burn with a flame , they burn with a glow . Finally , when the. 28 JUNIOR SCIENCE How does.
... it gives off heat ; a fourth , that there is usually some smoke . A fifth thing is that after solid fuels , like coal and wood , no longer burn with a flame , they burn with a glow . Finally , when the. 28 JUNIOR SCIENCE How does.
Σελίδα 29
John Charles Hessler. they burn with a glow . Finally , when the coal or wood is entirely through burning , gray ashes remain . Many substances do not seem to burn at all ; such are the iron of a stove and the bricks of a fireplace . Why ...
John Charles Hessler. they burn with a glow . Finally , when the coal or wood is entirely through burning , gray ashes remain . Many substances do not seem to burn at all ; such are the iron of a stove and the bricks of a fireplace . Why ...
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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.