Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
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Σελίδα iv
... have been kept constantly in mind . This statement applies both to the quantity of material selected and to its kind . The style of the book is simple . The section titles are nearly all queries ; many questions iv PREFACE.
... have been kept constantly in mind . This statement applies both to the quantity of material selected and to its kind . The style of the book is simple . The section titles are nearly all queries ; many questions iv PREFACE.
Σελίδα 27
... kind of rock ) with a short bar of steel and produced hot sparks . They caught the sparks in some tinder and thus set the tinder on fire . We often see such sparks when a horse's hoofs strike a stone pavement . The tinder consisted of ...
... kind of rock ) with a short bar of steel and produced hot sparks . They caught the sparks in some tinder and thus set the tinder on fire . We often see such sparks when a horse's hoofs strike a stone pavement . The tinder consisted of ...
Σελίδα 46
... we make an imitation of soda water . Let us put into a pop - bottle , or some other kind of bottle that we can stopper tightly , a tablespoonful of baking soda , enough water to half fill the bottle , and three 46 JUNIOR SCIENCE.
... we make an imitation of soda water . Let us put into a pop - bottle , or some other kind of bottle that we can stopper tightly , a tablespoonful of baking soda , enough water to half fill the bottle , and three 46 JUNIOR SCIENCE.
Σελίδα 78
... kind of gas . Its active gas is oxygen , which is used in burning and in respiration ; its inactive gas is chiefly nitrogen . Another gas that is present in the atmosphere is carbon dioxide ( cf. § 42 ) . Besides these gases there is ...
... kind of gas . Its active gas is oxygen , which is used in burning and in respiration ; its inactive gas is chiefly nitrogen . Another gas that is present in the atmosphere is carbon dioxide ( cf. § 42 ) . Besides these gases there is ...
Σελίδα 104
... kind of experience we have all our lives , unless we think out what is really happening . Besides the sun and the moon , there are several other heavenly bodies which do not remain in any constellation as the fixed stars do ; these are ...
... kind of experience we have all our lives , unless we think out what is really happening . Besides the sun and the moon , there are several other heavenly bodies which do not remain in any constellation as the fixed stars do ; these are ...
Περιεχόμενα
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Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
acid ammonia animals bacteria becomes birds blood body boiling bones bottle breathing bulb burning called candle carbon dioxide carry cause cells cerebrum changed cloth coal cold color cool copper covered dermis digestive earth eggs electric electric current epidermis feet fibers fire flame flowers force fruit give glass grow heat hydrochloric acid hydrogen insects inside iron larvæ layer learned leaves legumes light limewater liquid lungs machine magnet manganese dioxide material meat metal milk moon mouth muscles needle nerve nitrogen object organs oxide oxygen pass phosphorus piece pistil piston plants pole potassium chlorate pounds pressure produce pump push rays rock rubbed sal ammoniac salt seeds skin soil stamens starch steam stem stomata stove substances sugar sulphur sunlight surface temperature tissue trees tube 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.