Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
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Αποτελέσματα 1 - 5 από τα 63.
Σελίδα iii
... true of the fundamental sciences Physics and Chemistry . As a result , few of the young people who go to school ever study the physical sciences at all and these few only at the end of their student careers . To say that most students ...
... true of the fundamental sciences Physics and Chemistry . As a result , few of the young people who go to school ever study the physical sciences at all and these few only at the end of their student careers . To say that most students ...
Σελίδα iv
... true that he needs to BE TAUGHT Science ; it is more nearly true that he needs an opportunity to LEARN science and to put it to use . Science teaching , moreover , does not consist in getting a pupil to answer the teacher's questions ...
... true that he needs to BE TAUGHT Science ; it is more nearly true that he needs an opportunity to LEARN science and to put it to use . Science teaching , moreover , does not consist in getting a pupil to answer the teacher's questions ...
Σελίδα 13
... true . Air is in- visible to us , except when we see its quivering motion over a hot stove or on a hot day in summer . What man could not see , he found it hard to handle and to under- stand . Thus , when he used up some of the air , he ...
... true . Air is in- visible to us , except when we see its quivering motion over a hot stove or on a hot day in summer . What man could not see , he found it hard to handle and to under- stand . Thus , when he used up some of the air , he ...
Σελίδα 15
... true ? 66 99 If we wish to get the weight of a cupful of water ( Fig . 5 ) , we first weigh the empty cup ; then we fill the cup with water and get the weight of the cup and water together . By — FIG . 5. Scales for laboratory weighing ...
... true ? 66 99 If we wish to get the weight of a cupful of water ( Fig . 5 ) , we first weigh the empty cup ; then we fill the cup with water and get the weight of the cup and water together . By — FIG . 5. Scales for laboratory weighing ...
Σελίδα 21
... true of an ocean of air ? Let us perform a few ex- periments to find out . ( a ) Look back at § 9 , Fig . 4. Why does not the water fall out of the bottle that is set , upside down , in the pan of water ? ( b ) Fill a drinking glass or ...
... true of an ocean of air ? Let us perform a few ex- periments to find out . ( a ) Look back at § 9 , Fig . 4. Why does not the water fall out of the bottle that is set , upside down , in the pan of water ? ( b ) Fill a drinking glass or ...
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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.