Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
Αναζήτηση στο βιβλίο
Αποτελέσματα 1 - 5 από τα 34.
Σελίδα 37
... solution . No heating is needed . The mixture bubbles , or foams , as the oxygen rises through the water . The oxygen pushes the air out of the bottle ; soon we have the bottle full of oxygen . - - 31. What is Oxygen Like ? We are ...
... solution . No heating is needed . The mixture bubbles , or foams , as the oxygen rises through the water . The oxygen pushes the air out of the bottle ; soon we have the bottle full of oxygen . - - 31. What is Oxygen Like ? We are ...
Σελίδα 47
... formed from the action of baking soda with an acid . The baking soda is dissolved in water and the solution is kept in a metal tank . A bottle of sulphuric acid is fastened in the upper part of the tank . When CARBON AND CARBON DIOXIDE 47.
... formed from the action of baking soda with an acid . The baking soda is dissolved in water and the solution is kept in a metal tank . A bottle of sulphuric acid is fastened in the upper part of the tank . When CARBON AND CARBON DIOXIDE 47.
Σελίδα 48
... solution 42. How Does Carbon Dioxide Get into the Air ? -Do you need any proof that there is carbon dioxide in the air ? Then set a shallow dish of limewater in the air in your schoolroom and watch it for an hour or two . It will become ...
... solution 42. How Does Carbon Dioxide Get into the Air ? -Do you need any proof that there is carbon dioxide in the air ? Then set a shallow dish of limewater in the air in your schoolroom and watch it for an hour or two . It will become ...
Σελίδα 131
... solution off . The zinc will then be covered with a thin , black coating of copper . If you now add the acid to the zinc , the two will act rapidly . When the mixture is foaming , apply a match to the mouth of the test tube . Be careful ...
... solution off . The zinc will then be covered with a thin , black coating of copper . If you now add the acid to the zinc , the two will act rapidly . When the mixture is foaming , apply a match to the mouth of the test tube . Be careful ...
Σελίδα 135
... solution stand in a shallow dish until the water evaporates . If you examine the FIG . 78 . - lumps of salt left , especially with a magnifying glass , you will find that they are cubes and that they are arranged in masses that are ...
... solution stand in a shallow dish until the water evaporates . If you examine the FIG . 78 . - lumps of salt left , especially with a magnifying glass , you will find that they are cubes and that they are arranged in masses that are ...
Περιεχόμενα
3 | |
13 | |
21 | |
36 | |
42 | |
52 | |
61 | |
75 | |
260 | |
277 | |
313 | |
325 | |
343 | |
365 | |
386 | |
404 | |
112 | |
127 | |
152 | |
163 | |
178 | |
191 | |
198 | |
243 | |
449 | |
474 | |
485 | |
497 | |
503 | |
513 | |
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.