Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
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Σελίδα xv
... shape ? What is the inside of a tree like ? What are sapwood and heartwood ? How are trees cut into lumber ? What are the uses of wood ? How is paper made ? What are the 386 404 enemies of our trees ? - What is a weed CONTENTS XV.
... shape ? What is the inside of a tree like ? What are sapwood and heartwood ? How are trees cut into lumber ? What are the uses of wood ? How is paper made ? What are the 386 404 enemies of our trees ? - What is a weed CONTENTS XV.
Σελίδα 17
... inside . Finally its pressure becomes great enough to force the cork out with a " pop . " We can see how the pressure of water compresses air , if we put a glass of air , upside down , under water . The deeper the water , FIG . 8. the ...
... inside . Finally its pressure becomes great enough to force the cork out with a " pop . " We can see how the pressure of water compresses air , if we put a glass of air , upside down , under water . The deeper the water , FIG . 8. the ...
Σελίδα 20
... inside space of a basketball holds of a cubic foot . How much does this volume of air weigh ? Suppose that three times this volume of air is packed into the ball , what does the air in the ball weigh ? CHAPTER III PRESSURE OF THE ...
... inside space of a basketball holds of a cubic foot . How much does this volume of air weigh ? Suppose that three times this volume of air is packed into the ball , what does the air in the ball weigh ? CHAPTER III PRESSURE OF THE ...
Σελίδα 21
... inside of your lips or cheek . What evidence do you get of the pressure of the atmosphere ? What happens when you pull the bottle away ? ( d ) Over the mouth of a clay pipe tie tightly a piece of thin sheet rubber and then , by suction ...
... inside of your lips or cheek . What evidence do you get of the pressure of the atmosphere ? What happens when you pull the bottle away ? ( d ) Over the mouth of a clay pipe tie tightly a piece of thin sheet rubber and then , by suction ...
Σελίδα 22
John Charles Hessler. The pressure of the air inside and outside the bag will then be the same . Now make the mouth of the bag small and remove the air by suction . Why does the bag collapse ? Can you tell why you can drink lemonade or ...
John Charles Hessler. The pressure of the air inside and outside the bag will then be the same . Now make the mouth of the bag small and remove the air by suction . Why does the bag collapse ? Can you tell why you can drink lemonade 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.