The New book of knowledge, Volum 11An illustrated encyclopedia containing over 9,000 articles on history, literature, art and music, geography, myths and legends, mathematics, science, hobbies, holidays and festivals, games, sports, crafts, medicine, law, government, industry, politics, and other topics. |
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Side 20
But instead of the oxygen we breathe, there was only carbon dioxide and some
water vapor. The composition of the atmosphere probably changed very little until
green plants began to grow in the freshwater pools and seas on the earth's ...
But instead of the oxygen we breathe, there was only carbon dioxide and some
water vapor. The composition of the atmosphere probably changed very little until
green plants began to grow in the freshwater pools and seas on the earth's ...
Side 44
The carbon and oxygen cycles begin in the atmosphere. Carbon is found in the
atmosphere in the form of the gas carbon dioxide. Plants use carbon dioxide from
the air in photosynthesis, and the carbon becomes part of the plants' cells.
The carbon and oxygen cycles begin in the atmosphere. Carbon is found in the
atmosphere in the form of the gas carbon dioxide. Plants use carbon dioxide from
the air in photosynthesis, and the carbon becomes part of the plants' cells.
Side 163
OXYGEN: A colorless gas. Oxygen is the most common element in the crust of
the earth, making up nearly half of it. ... Oxygen is an active element that
combines easily with many other substances to yield energy. Gasoline, coal,
paper, wood, ...
OXYGEN: A colorless gas. Oxygen is the most common element in the crust of
the earth, making up nearly half of it. ... Oxygen is an active element that
combines easily with many other substances to yield energy. Gasoline, coal,
paper, wood, ...
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19th century actinide series Africa Age of Exploration Akhenaten alternating current American ancient animals became began British building built called canal century changes charge chemical church cities coast coil crust developed earth earthquake East eclipse Ecuador eels eggs Egypt Eisenhower electric current electric motor electronic music electrons elements elephants elevator energy engine England English Equatorial Guinea ERBIUM Eskimos Ethiopia Europe European explosives fish flow France Greek heat important Indian Indian elephant industry iron islands kilometers kind king land language lanthanide learned light live magnet ment metal meters modern mountains move nations North ocean oxygen painted Parliament plants plate poems poet poles pollution produce promethium radio River rock Roman schools scientists Soviet Spain steam surface tion United uosipg voltage vote waves William wire wrote