L’espace - 3e
Repérage sur une sphère
Exercice 1 : Lire les coordonnées géographique d'une ville sur terre à partir des parallèles et méridiens
Sur le schéma ci-dessous, le point D symbolise la ville d'Erzincan (Turquie).
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On pourra faire pivoter la figure en cliquant dessus.
Légende
- Méridien d'origine Greenwich 0°
- Méridiens (espacés de 20°)
- Équateur 0°
- Parallèles (espacés de 20°)
- N : Pôle nord
- S : Pôle sud
- D : Ville d'Erzincan
Donner les coordonnées géographique de la ville d'Erzincan (Turquie).
Par exemple:
Par exemple:
- Pour la ville d'Orenbourg (Russie) on donnera une réponse de la forme \(\left(52° N; 55° E\right)\)
- Pour la ville de Karaman (Turquie) on donnera une réponse de la forme \(\left(37° N; 33° E\right)\)
Exercice 2 : Lire latitude ou longitude d'une ville sur terre à partir des angles
Sur le schéma ci-dessous, le point D symbolise la ville de Taitung City (Taïwan).
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On pourra faire pivoter la figure en cliquant dessus.
Légende
- Méridien d'origine Greenwich 0°
- Méridien du point D
- Équateur 0°
- Parallèle du point D
- N : Pôle nord
- S : Pôle sud
- C : Centre de la terre
- D : Ville de Taitung City
Sachant que \( \widehat{DCN} = 67 ° \), \( \widehat{ABD} = 121 ° \), \( \widehat{ECD} = 23 ° \) et \( \widehat{SCE} = 90 ° \), donner la longitude de la ville de Taitung City (Taïwan).
Exemples de format de réponses attendu : \(80°N\), \(60°S\), \(80°E\) ou \(20°O\)
Exemples de format de réponses attendu : \(80°N\), \(60°S\), \(80°E\) ou \(20°O\)
Exercice 3 : Calculer le rayon d'un parallèle
On assimile la Terre à une sphère de rayon \( 6\:400\:\text{km} \).
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On pourra faire pivoter la figure en cliquant dessus.
Légende
- Équateur 0°
- Parallèle passant par D
- N : Pôle nord
- S : Pôle sud
- D : Ville de Bibirevo
Déterminer le rayon du parallèle passant à Bibirevo de coordonnées (56° N, 38° E).
On arrondira donnera un résultat arrondi au \( km \).
On arrondira donnera un résultat arrondi au \( km \).
Exercice 4 : Lire latitude ou longitude d'une ville sur terre à partir des parallèles et méridiens
Sur le schéma ci-dessous, le point D symbolise la ville de Naucalpan de Juárez (Mexique).
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On pourra faire pivoter la figure en cliquant dessus.
Légende
- Méridien d'origine Greenwich 0°
- Méridiens (espacés de 20°)
- Équateur 0°
- Parallèles (espacés de 20°)
- N : Pôle nord
- S : Pôle sud
- D : Ville de Naucalpan de Juárez
Donner la longitude de la ville de Naucalpan de Juárez (Mexique).
Exemples de format de réponses attendu : \(80°N\), \(60°S\), \(80°E\) ou \(20°O\)
Exemples de format de réponses attendu : \(80°N\), \(60°S\), \(80°E\) ou \(20°O\)
Exercice 5 : Calculer la longueur de l'équateur ou d'un méridien à partir du rayon/diamètre de la planète
Sur une planète de diamètre \( 7\:000\:\text{km} \), on définit l'équateur de la même manière que sur Terre.
Quelle est la longueur de l'équateur de cette planète ?
On arrondira le résultat au kilomètre près, suivi de l'unité qui convient.
On arrondira le résultat au kilomètre près, suivi de l'unité qui convient.