Children's Encyclopedia1976 |
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Pàgina 26
... speed and skill . A lion must quietly stalk its victim without letting the hunted animal catch its scent . And it must close in swiftly for the kill . Everyone knows how difficult it is to catch a fly . Imagine how much more difficult ...
... speed and skill . A lion must quietly stalk its victim without letting the hunted animal catch its scent . And it must close in swiftly for the kill . Everyone knows how difficult it is to catch a fly . Imagine how much more difficult ...
Pàgina 57
... speed of the small one . Turning the Wheels Some cars have automatic transmission . This means that the engine changes gear itself when it reaches certain speeds . The driver does not have to change gear unless he wants to go backwards ...
... speed of the small one . Turning the Wheels Some cars have automatic transmission . This means that the engine changes gear itself when it reaches certain speeds . The driver does not have to change gear unless he wants to go backwards ...
Pàgina 59
... speed of sound . A great deal has happened in the years since the Wright brothers flew that first little hop . The German Otto Lilienthal learned about flying by making gliders . He hung below his early machines and controlled them by ...
... speed of sound . A great deal has happened in the years since the Wright brothers flew that first little hop . The German Otto Lilienthal learned about flying by making gliders . He hung below his early machines and controlled them by ...
Altres edicions - Mostra-ho tot
Frases i termes més freqüents
adult Aerotrain Africa Arctic areas armor atomic battle bigger birds body bomb bones brain breathe build built butterfly called carried cells cities coal colored crankshaft creatures crops cylinder deep desert dinosaurs earth eggs Egyptian plover electricity enemies engine feet fish flower forests galaxy gear Greeks ground grow heat hovercraft huge hunted insects inside jungle kinds knights land leaves light live look Louis Bleriot machine mammals miles millions Montgolfier brothers moon Mount Everest mountains move muscles nerves nest numbers oxygen picture piston plane pollen Prairie falcon railways rain reptiles river road rock Sahara Desert sailing sea anemone sea scorpions seeds shell ships shows skin South America South Pole space spacemen speed spider stars steam locomotives stone sun's sunlight surface tiny tractors trees turn wheels wind Wright brothers young