Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
Αναζήτηση στο βιβλίο
Αποτελέσματα 1 - 5 από τα 61.
Σελίδα iv
... reason for it , and to know how to deal with it , not only the progress of the individual , but also the life of the nation depends . Science , which demands observa- tion and reasoning , therefore yields to no branch of knowledge the ...
... reason for it , and to know how to deal with it , not only the progress of the individual , but also the life of the nation depends . Science , which demands observa- tion and reasoning , therefore yields to no branch of knowledge the ...
Σελίδα v
... reasons for many things they are now doing , the teacher can arouse them to know the " why " and the " how " of the duties that await them here- after . The text consists of two divisions : Books I and II . Book I contains four Parts ...
... reasons for many things they are now doing , the teacher can arouse them to know the " why " and the " how " of the duties that await them here- after . The text consists of two divisions : Books I and II . Book I contains four Parts ...
Σελίδα 3
... reason for the many things that happen in this world of ours . To be sure , the answers they first gave would probably sound very foolish to us , but grad- ually men were able to give well - thought - out and com- mon - sense answers to ...
... reason for the many things that happen in this world of ours . To be sure , the answers they first gave would probably sound very foolish to us , but grad- ually men were able to give well - thought - out and com- mon - sense answers to ...
Σελίδα 6
... reasons , that is , the real , common - sense reasons , for what he does . 4. What is an Experiment ? You have already seen how much we can learn if we observe common objects and phenomena closely and think clearly about them . In ...
... reasons , that is , the real , common - sense reasons , for what he does . 4. What is an Experiment ? You have already seen how much we can learn if we observe common objects and phenomena closely and think clearly about them . In ...
Σελίδα 23
... 30 inches high weighs 14.7 pounds . This is the reason why we say that the air pressure on every square inch of surface is about 15 pounds . 19. Is the Atmosphere's Pressure Always the Same ? - PRESSURE OF THE ATMOSPHERE 23.
... 30 inches high weighs 14.7 pounds . This is the reason why we say that the air pressure on every square inch of surface is about 15 pounds . 19. Is the Atmosphere's Pressure Always the Same ? - PRESSURE OF THE ATMOSPHERE 23.
Περιεχόμενα
3 | |
5 | |
13 | |
21 | |
42 | |
52 | |
61 | |
95 | |
243 | |
260 | |
277 | |
313 | |
325 | |
343 | |
365 | |
404 | |
112 | |
127 | |
152 | |
163 | |
198 | |
204 | |
214 | |
222 | |
449 | |
474 | |
492 | |
508 | |
517 | |
523 | |
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.