Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
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Σελίδα ix
... causes dew and frost ? - How are clouds formed ? Why do we have rain , snow , and hail ? - What is rainfall ? What are the winds ? What causes our great storms ? What is the weather service ? · Exercises . - PART III MATTER AND ENERGY ...
... causes dew and frost ? - How are clouds formed ? Why do we have rain , snow , and hail ? - What is rainfall ? What are the winds ? What causes our great storms ? What is the weather service ? · Exercises . - PART III MATTER AND ENERGY ...
Σελίδα x
... cause weathering ? How does the air aid weathering ? — How do water and ice cause - 127 141 152 163 weathering ? How is our soil formed ? What is X CONTENTS.
... cause weathering ? How does the air aid weathering ? — How do water and ice cause - 127 141 152 163 weathering ? How is our soil formed ? What is X CONTENTS.
Σελίδα xiv
... causes a sound ? an echo ? How do we hear ? What causes What is the difference between noise and tone ? What are the classes of musical instruments ? - How does a telephone carry sound ? - Exercises and summary . ― PAGE 299 313 CHAPTER ...
... causes a sound ? an echo ? How do we hear ? What causes What is the difference between noise and tone ? What are the classes of musical instruments ? - How does a telephone carry sound ? - Exercises and summary . ― PAGE 299 313 CHAPTER ...
Σελίδα xv
... cause motion ? - How does an engine run ? What makes an automobile run ? - Exercises and sum- mary . PART VI LIVING THINGS AND THEIR RELATION TO US CHAPTER XXXI The World of Plants How do plants live ? - What parts has a plant ? - How ...
... cause motion ? - How does an engine run ? What makes an automobile run ? - Exercises and sum- mary . PART VI LIVING THINGS AND THEIR RELATION TO US CHAPTER XXXI The World of Plants How do plants live ? - What parts has a plant ? - How ...
Σελίδα 4
... causes an eclipse of the sun , you might have been told that a great beast or spirit moves across the sky and blots out the sun ; afterwards men saw that an eclipse of the sun never occurs except at the time of new moon , " that is ...
... causes an eclipse of the sun , you might have been told that a great beast or spirit moves across the sky and blots out the sun ; afterwards men saw that an eclipse of the sun never occurs except at the time of new moon , " that is ...
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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.