Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
Αναζήτηση στο βιβλίο
Αποτελέσματα 1 - 5 από τα 71.
Σελίδα ix
... keep its heat ? - Why does perspiration cool the body ? Exercises . -- PAGE 71 CHAPTER X Weather What is the weather ? Of what is the atmosphere com- posed ? What causes dew and frost ? - How are clouds formed ? Why do we have rain ...
... keep its heat ? - Why does perspiration cool the body ? Exercises . -- PAGE 71 CHAPTER X Weather What is the weather ? Of what is the atmosphere com- posed ? What causes dew and frost ? - How are clouds formed ? Why do we have rain ...
Σελίδα 5
... . Think of all we could learn if we would keep our eyes open at home and on our way to and from school ! We do not even need to go into the country to learn about trees , shrubs , and weeds , about insects , BEGINNINGS OF SCIENCE 5 work?
... . Think of all we could learn if we would keep our eyes open at home and on our way to and from school ! We do not even need to go into the country to learn about trees , shrubs , and weeds , about insects , BEGINNINGS OF SCIENCE 5 work?
Σελίδα 18
... , or do other work under water ? We learned in the last section that if a vessel of air is pushed , mouth down- ward , under water , the pressure of the water compresses the air . If we are to keep the vessel 18 JUNIOR SCIENCE.
... , or do other work under water ? We learned in the last section that if a vessel of air is pushed , mouth down- ward , under water , the pressure of the water compresses the air . If we are to keep the vessel 18 JUNIOR SCIENCE.
Σελίδα 19
John Charles Hessler. the air . If we are to keep the vessel entirely full of air , we must force a supply of air ... keeps the water from rushing in and furnishes fresh air for the diver . The air is kept flowing , so that it bubbles out ...
John Charles Hessler. the air . If we are to keep the vessel entirely full of air , we must force a supply of air ... keeps the water from rushing in and furnishes fresh air for the diver . The air is kept flowing , so that it bubbles out ...
Σελίδα 31
... keep . If the yellow is used , it must be kept under water and cut under water , or it may take fire of itself and cause serious burns . For this reason , the piece cut off for use must be handled with forceps or tongs , never with the ...
... keep . If the yellow is used , it must be kept under water and cut under water , or it may take fire of itself and cause serious burns . For this reason , the piece cut off for use must be handled with forceps or tongs , never with the ...
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.