Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
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Σελίδα xv
... seeds begin growing ? What are leaves like ? leaves made of ? · plant climb ? work of roots ? What is the work of leaves ? What are stems and buds for ? Why do plants have flowers ? - What are - How does a - What is the How are seeds ...
... seeds begin growing ? What are leaves like ? leaves made of ? · plant climb ? work of roots ? What is the work of leaves ? What are stems and buds for ? Why do plants have flowers ? - What are - How does a - What is the How are seeds ...
Σελίδα 3
... 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 electricity are , why we have eclipses of the sun and ...
... 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 electricity are , why we have eclipses of the sun and ...
Σελίδα 40
... seed oil unites with the oxygen of the What gas remains ? air in the test tube . power . " The turpentine not only thins the paint , but assists in drying the oil . When paint dries , its linseed oil is oxidized by the air to a hard gum ...
... seed oil unites with the oxygen of the What gas remains ? air in the test tube . power . " The turpentine not only thins the paint , but assists in drying the oil . When paint dries , its linseed oil is oxidized by the air to a hard gum ...
Σελίδα 166
... seeds and fruit , all petrified . Often we find the im- prints of animals ; creatures with shells looking like those of snails and clams . In some rocks the imprints are ( Copyright by McIntosh Stereopticon Co. ) 1 FIG . 92. A fossil of ...
... seeds and fruit , all petrified . Often we find the im- prints of animals ; creatures with shells looking like those of snails and clams . In some rocks the imprints are ( Copyright by McIntosh Stereopticon Co. ) 1 FIG . 92. A fossil of ...
Σελίδα 168
... life has one way of defeating , or holding back , erosion . If you have a terrace in your yard , you have seen that grass seed is carefully sowed there until a firm sod results . If there isn't a firm sod. 168 JUNIOR SCIENCE.
... life has one way of defeating , or holding back , erosion . If you have a terrace in your yard , you have seen that grass seed is carefully sowed there until a firm sod results . If there isn't a firm sod. 168 JUNIOR SCIENCE.
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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.