Junior ScienceB.H. Sanborn, 1921 - 533 σελίδες |
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Αποτελέσματα 1 - 5 από τα 100.
Σελίδα ix
... body have weight ? In what direction does the earth pull ? Why does a body float ? Can a body move itself ? What is a force ? - Why do objects fly from the What is the density of water ? Can you stand an egg on end ? Why does a pendulum ...
... body have weight ? In what direction does the earth pull ? Why does a body float ? Can a body move itself ? What is a force ? - Why do objects fly from the What is the density of water ? Can you stand an egg on end ? Why does a pendulum ...
Σελίδα xvi
... BODIES AND HOW TO CARE FOR THEM The Structure of the Body CHAPTER XXXV What is the plan of the body ? What are cells made of ? - ---- What are living cells like ? What are bones like ? How do bones grow ? Why do we have joints ? What is ...
... BODIES AND HOW TO CARE FOR THEM The Structure of the Body CHAPTER XXXV What is the plan of the body ? What are cells made of ? - ---- What are living cells like ? What are bones like ? How do bones grow ? Why do we have joints ? What is ...
Σελίδα 25
... bodies is about 17 pounds to the square inch ; hence there is danger of hemorrhage , or bursting of the blood vessels ... body must support a pressure of 30,000 pounds . Why do you not feel so great a pressure ? 2. When the cover of a ...
... bodies is about 17 pounds to the square inch ; hence there is danger of hemorrhage , or bursting of the blood vessels ... body must support a pressure of 30,000 pounds . Why do you not feel so great a pressure ? 2. When the cover of a ...
Σελίδα 32
... body with the oxygen of the air . The burning body and the oxygen rush together so vigorously that heat and light are produced . The burning body sometimes disappears , as far as we can tell by our senses , but if we have the skill and ...
... body with the oxygen of the air . The burning body and the oxygen rush together so vigorously that heat and light are produced . The burning body sometimes disappears , as far as we can tell by our senses , but if we have the skill and ...
Σελίδα 52
... body and to remove carbon dioxide from the body . We must remember , too , that the oxygen we breathe does not stop in the lungs , but 52 CHAPTER VII The Air We Breathe 32 Why do we breathe? Why do we need ventilation?
... body and to remove carbon dioxide from the body . We must remember , too , that the oxygen we breathe does not stop in the lungs , but 52 CHAPTER VII The Air We Breathe 32 Why do we breathe? Why do we need ventilation?
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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.