Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
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Αποτελέσματα 1 - 5 από τα 53.
Σελίδα xv
... trees our friends ? How does a tree get its 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 our friends ? How does a tree get its 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 ...
Σελίδα xvi
John Charles Hessler. enemies of our trees ? - What is a weed ? for beauty ? — Can man improve upon and summary . CHAPTER XXXIV How can we plant nature ? — Exercises Animals of Importance to Man How many kinds of animals are there ...
John Charles Hessler. enemies of our trees ? - What is a weed ? for beauty ? — Can man improve upon and summary . CHAPTER XXXIV How can we plant nature ? — Exercises Animals of Importance to Man How many kinds of animals are there ...
Σελίδα 3
... trees shed their leaves , why plants produce seeds , why dew is formed , why milk sours , why yeast raises bread , why the moon grows and wanes , why the sun gives off heat ? Did you ever wonder what fire , sound , light , and ...
... trees shed their leaves , why plants produce seeds , why dew is formed , why milk sours , why yeast raises bread , why the moon grows and wanes , why the sun gives off heat ? Did you ever wonder what fire , sound , light , and ...
Σελίδα 5
... 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?
... 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 6
John Charles Hessler. trees , shrubs , and weeds , about insects , birds , rocks , clouds , and the wind , or how the ground is washed by the rain . Suppose we really " look into " the kitchen and find out what materials and tools are ...
John Charles Hessler. trees , shrubs , and weeds , about insects , birds , rocks , clouds , and the wind , or how the ground is washed by the rain . Suppose we really " look into " the kitchen and find out what materials and tools are ...
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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.