Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
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Σελίδα xvii
... skin ? - How do hair and nails grow ? -- What is the work of the skin ? What is the value of bathing ? -Exercises and summary . ― ― PAGE 474 485 CHAPTER XXXIX Senses and Habits How can our organs work together ? the brain ? cord like ...
... skin ? - How do hair and nails grow ? -- What is the work of the skin ? What is the value of bathing ? -Exercises and summary . ― ― PAGE 474 485 CHAPTER XXXIX Senses and Habits How can our organs work together ? the brain ? cord like ...
Σελίδα 58
... skin evaporates too rapidly and leaves the skin parched and dry . The reason in this case is that on these days the air holds too little moisture and so takes it up from everything that con- tains it , including our skin and the linings ...
... skin evaporates too rapidly and leaves the skin parched and dry . The reason in this case is that on these days the air holds too little moisture and so takes it up from everything that con- tains it , including our skin and the linings ...
Σελίδα 67
... skin tell us something of temperature , but not accurately enough . If we want to keep a room warm to please an elderly person , we are likely to get it too warm for the children . The best temperature for the air of a house is said to ...
... skin tell us something of temperature , but not accurately enough . If we want to keep a room warm to please an elderly person , we are likely to get it too warm for the children . The best temperature for the air of a house is said to ...
Σελίδα 75
... skin , even when we do not know it . If we are very hot from exercise , the perspiration is formed more rapidly than it can evaporate and we have noticeable perspiration , " or or sweating . Heat is needed to produce evaporation of a ...
... skin , even when we do not know it . If we are very hot from exercise , the perspiration is formed more rapidly than it can evaporate and we have noticeable perspiration , " or or sweating . Heat is needed to produce evaporation of a ...
Σελίδα 193
... skin and clothing upon which they fall . Metals are also " eaten , " or etched , ” by acids . We have already learned that in making hydrogen ( cf. § 114 ) zinc 66 is used up , or eaten , by the acid , and disappears . Are copper and ...
... skin and clothing upon which they fall . Metals are also " eaten , " or etched , ” by acids . We have already learned that in making hydrogen ( cf. § 114 ) zinc 66 is used up , or eaten , by the acid , and disappears . Are copper and ...
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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.