earth science: exploring planet earth - part 8 of 35. earth science embraces broad areas of study. since ancient times, humans have tried to discover the secrets of earth. we have studied the motions of celestial bodies, made observations on volcanic acti - 1970 1979 個影片檔及 b 捲影像00:27
earth science: exploring planet earth - part 7 of 35. earth science embraces broad areas of study. since ancient times, humans have tried to discover the secrets of earth. we have studied the motions of celestial bodies, made observations on volcanic acti - 1970 1979 個影片檔及 b 捲影像00:33
earth science: exploring planet earth - part 6 of 35. earth science embraces broad areas of study. since ancient times, humans have tried to discover the secrets of earth. we have studied the motions of celestial bodies, made observations on volcanic acti - 1970 1979 個影片檔及 b 捲影像00:33
earth science: exploring planet earth - part 5 of 35. earth science embraces broad areas of study. since ancient times, humans have tried to discover the secrets of earth. we have studied the motions of celestial bodies, made observations on volcanic acti - 1970 1979 個影片檔及 b 捲影像00:27
earth science: exploring planet earth - part 4 of 35. earth science embraces broad areas of study. since ancient times, humans have tried to discover the secrets of earth. we have studied the motions of celestial bodies, made observations on volcanic acti - 1970 1979 個影片檔及 b 捲影像00:32
earth science: exploring planet earth - part 3 of 35. earth science embraces broad areas of study. since ancient times, humans have tried to discover the secrets of earth. we have studied the motions of celestial bodies, made observations on volcanic acti - 1970 1979 個影片檔及 b 捲影像00:26
earth science: exploring planet earth - part 2 of 35. earth science embraces broad areas of study. since ancient times, humans have tried to discover the secrets of earth. we have studied the motions of celestial bodies, made observations on volcanic acti - 1970 1979 個影片檔及 b 捲影像00:32
earth science: exploring planet earth - part 1 of 35. earth science embraces broad areas of study. since ancient times, humans have tried to discover the secrets of earth. we have studied the motions of celestial bodies, made observations on volcanic acti - 1970 1979 個影片檔及 b 捲影像00:32
minerals and rocks (2nd edition) - part 20 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from - 1970 1979 個影片檔及 b 捲影像00:31
minerals and rocks (2nd edition) - part 19 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from - 1970 1979 個影片檔及 b 捲影像00:35
minerals and rocks (2nd edition) - part 18 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from - 1970 1979 個影片檔及 b 捲影像00:32岩石, 美國
minerals and rocks (2nd edition) - part 17 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from - 1970 1979 個影片檔及 b 捲影像00:32
minerals and rocks (2nd edition) - part 16 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from - 1970 1979 個影片檔及 b 捲影像00:37
minerals and rocks (2nd edition) - part 15 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from - 1970 1979 個影片檔及 b 捲影像00:36
minerals and rocks (2nd edition) - part 14 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from - 1970 1979 個影片檔及 b 捲影像00:38
minerals and rocks (2nd edition) - part 13 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from - 1970 1979 個影片檔及 b 捲影像00:30
minerals and rocks (2nd edition) - part 12 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from - 1970 1979 個影片檔及 b 捲影像00:38
minerals and rocks (2nd edition) - part 11 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from - 1970 1979 個影片檔及 b 捲影像00:31
minerals and rocks (2nd edition) - part 10 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from - 1970 1979 個影片檔及 b 捲影像00:30
minerals and rocks (2nd edition) - part 9 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from w - 1970 1979 個影片檔及 b 捲影像00:32美國
minerals and rocks (2nd edition) - part 8 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from w - 1970 1979 個影片檔及 b 捲影像00:32
minerals and rocks (2nd edition) - part 7 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from w - 1970 1979 個影片檔及 b 捲影像00:36
minerals and rocks (2nd edition) - part 6 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from w - 1970 1979 個影片檔及 b 捲影像00:31
minerals and rocks (2nd edition) - part 5 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from w - 1970 1979 個影片檔及 b 捲影像00:27
minerals and rocks (2nd edition) - part 4 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from w - 1970 1979 個影片檔及 b 捲影像00:30
minerals and rocks (2nd edition) - part 3 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from w - 1970 1979 個影片檔及 b 捲影像00:32
minerals and rocks (2nd edition) - part 2 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from w - 1970 1979 個影片檔及 b 捲影像00:26
minerals and rocks (2nd edition) - part 1 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from w - 1970 1979 個影片檔及 b 捲影像00:23
minerals and rocks (2nd edition) - part 26 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from - 1970 1979 個影片檔及 b 捲影像00:34
minerals and rocks (2nd edition) - part 25 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from - 1970 1979 個影片檔及 b 捲影像00:35
minerals and rocks (2nd edition) - part 24 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from - 1970 1979 個影片檔及 b 捲影像00:28
minerals and rocks (2nd edition) - part 23 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from - 1970 1979 個影片檔及 b 捲影像00:29
minerals and rocks (2nd edition) - part 22 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from - 1970 1979 個影片檔及 b 捲影像00:39
minerals and rocks (2nd edition) - part 21 of 26. from the broad mountain ranges and the land we walk on, to the depths of the ocean, the basic material from which this planet is comprised is rock. and the tiny crystalline substances called minerals from - 1970 1979 個影片檔及 b 捲影像00:31貨倉
food - part 18 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking an - 1970 1979 個影片檔及 b 捲影像00:38美國
food - part 17 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking an - 1970 1979 個影片檔及 b 捲影像00:35
food - part 16 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking an - 1970 1979 個影片檔及 b 捲影像00:36
food - part 15 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking an - 1970 1979 個影片檔及 b 捲影像00:30
food - part 14 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking an - 1970 1979 個影片檔及 b 捲影像00:31
food - part 13 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking an - 1970 1979 個影片檔及 b 捲影像00:32
food - part 12 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking an - 1970 1979 個影片檔及 b 捲影像00:30逛街, 水果
food - part 11 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking an - 1970 1979 個影片檔及 b 捲影像00:31
food - part 10 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking an - 1970 1979 個影片檔及 b 捲影像00:30
food - part 9 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking ans - 1970 1979 個影片檔及 b 捲影像00:37
food - part 8 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking ans - 1970 1979 個影片檔及 b 捲影像00:31
food - part 7 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking ans - 1970 1979 個影片檔及 b 捲影像00:35
food - part 5 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking ans - 1970 1979 個影片檔及 b 捲影像00:29
food - part 6 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking ans - 1970 1979 個影片檔及 b 捲影像00:33
food - part 4 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking ans - 1970 1979 個影片檔及 b 捲影像00:31
food - part 3 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking ans - 1970 1979 個影片檔及 b 捲影像00:32
food - part 2 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking ans - 1970 1979 個影片檔及 b 捲影像00:32美國
food - part 1 of 18. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their physical environment, seeking ans - 1970 1979 個影片檔及 b 捲影像00:33
biology: exploring the living world - part 33 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:30
biology: exploring the living world - part 32 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:23
biology: exploring the living world - part 31 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:29
biology: exploring the living world - part 30 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:36猴子
biology: exploring the living world - part 29 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:35飛機, 美國
biology: exploring the living world - part 28 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:37
biology: exploring the living world - part 27 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:36
biology: exploring the living world - part 26 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:31
biology: exploring the living world - part 25 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:27
biology: exploring the living world - part 24 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:35
biology: exploring the living world - part 23 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:29
biology: exploring the living world - part 22 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:31響尾蛇類
biology: exploring the living world - part 21 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:29
biology: exploring the living world - part 20 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:31
biology: exploring the living world - part 19 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:27
biology: exploring the living world - part 18 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:17
biology: exploring the living world - part 17 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:31黃石國家公園
biology: exploring the living world - part 16 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:34黃石國家公園
biology: exploring the living world - part 15 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:34
biology: exploring the living world - part 14 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:35
biology: exploring the living world - part 13 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:30
biology: exploring the living world - part 12 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:33
biology: exploring the living world - part 11 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:30果蠅
biology: exploring the living world - part 10 of 33. this overview film from the encyclopaedia britannica education biology program will spark students' interest in the study of biology. the film examines the relationship between living things and their p - 1970 1979 個影片檔及 b 捲影像00:30
