Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
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Αποτελέσματα 1 - 5 από τα 65.
Σελίδα ix
... objects fly from the What is the density of water ? Can you stand an egg on end ? Why does a pendulum swing ? When has a body energy ? center ? Why do planets revolve around the sun ? — Is there any force in a water surface ? PAGE ...
... objects fly from the What is the density of water ? Can you stand an egg on end ? Why does a pendulum swing ? When has a body energy ? center ? Why do planets revolve around the sun ? — Is there any force in a water surface ? PAGE ...
Σελίδα xiii
... objects ? How does sunlight travel ? How does a mirror change light ? Why does an object have a shadow ? How does distance affect the brightness of light ? - 260 277 Can light be turned out of its course ? - xiii.
... objects ? How does sunlight travel ? How does a mirror change light ? Why does an object have a shadow ? How does distance affect the brightness of light ? - 260 277 Can light be turned out of its course ? - xiii.
Σελίδα xiv
... object have color ? How can we trap sunlight ? How does the eye see ? - Exercises and sum- mary . ―― CHAPTER XXVII Light in the House - How do we get sunlight into the house ? How have men lighted their houses at night ? How do kerosene ...
... object have color ? How can we trap sunlight ? How does the eye see ? - Exercises and sum- mary . ―― CHAPTER XXVII Light in the House - How do we get sunlight into the house ? How have men lighted their houses at night ? How do kerosene ...
Σελίδα 3
... objects you see and what happens to them . So far as we know , men have always wondered about the earth and the sky ; they seem always to have tried to find the reason for the many things that happen in this world of ours . To be sure ...
... objects you see and what happens to them . So far as we know , men have always wondered about the earth and the sky ; they seem always to have tried to find the reason for the many things that happen in this world of ours . To be sure ...
Σελίδα 5
... objects about us and the changes that take place in them . We must see them not only with FIG . 1. Franklin raising ... object , such as a fire , an eclipse , or the falling of a stone , a phenomenon ; the plural is phenomena . Think of ...
... objects about us and the changes that take place in them . We must see them not only with FIG . 1. Franklin raising ... object , such as a fire , an eclipse , or the falling of a stone , a phenomenon ; the plural is phenomena . Think of ...
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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.