Maîtrisez les mesures : conversions, périmètres et aires

Question 1 sur 10 10:00

[{"id":62832,"question":"Quelle unité est utilisée pour mesurer la masse d'un objet ?","option_a":"Mètre","option_b":"Litre","option_c":"Kilogramme","option_d":"Centimètre","option_e":"","option_f":"","bonne_reponse":"C","explication":"Le kilogramme (kg) est l'unité de base pour la masse dans le système métrique.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":62833,"question":"1 hectare équivaut à :","option_a":"100 m²","option_b":"1 000 m²","option_c":"10 000 m²","option_d":"100 000 m²","option_e":"","option_f":"","bonne_reponse":"C","explication":"1 hectare = 10 000 m², une unité courante pour mesurer les surfaces agricoles.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":62834,"question":"Vrai ou Faux ? Le périmètre d'un carré se calcule en multipliant le côté par 4.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"C'est exact : Périmètre = 4 × côté.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":62835,"question":"Quelle est la conversion correcte de 3,5 km en mètres ?","option_a":"35 m","option_b":"350 m","option_c":"3 500 m","option_d":"35 000 m","option_e":"","option_f":"","bonne_reponse":"C","explication":"1 km = 1 000 m, donc 3,5 km = 3 500 m.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":62836,"question":"Vrai ou Faux ? L'aire d'un rectangle se calcule en additionnant la longueur et la largeur.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"L'aire d'un rectangle = longueur × largeur (et non l'addition).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":62837,"question":"Quelle unité utilise-t-on pour mesurer la capacité d'une bouteille d'eau ?","option_a":"Gramme","option_b":"Litre","option_c":"Mètre","option_d":"Kilogramme","option_e":"","option_f":"","bonne_reponse":"B","explication":"Le litre (L) est l'unité de mesure de la capacité (volume).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":62838,"question":"Si une carte a une échelle de 1:50 000, à quelle distance réelle correspondent 2 cm sur la carte ?","option_a":"100 m","option_b":"1 km","option_c":"10 km","option_d":"100 km","option_e":"","option_f":"","bonne_reponse":"B","explication":"2 cm × 50 000 = 100 000 cm = 1 km (car 100 000 cm = 1 000 m = 1 km).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":62839,"question":"Vrai ou Faux ? 1 décimètre cube (dm³) équivaut à 1 litre.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"C'est vrai : 1 dm³ = 1 L, une conversion fondamentale en volume.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":62840,"question":"Quelle est l'aire d'un carré de 5 cm de côté ?","option_a":"10 cm²","option_b":"20 cm²","option_c":"25 cm²","option_d":"30 cm²","option_e":"","option_f":"","bonne_reponse":"C","explication":"Aire d'un carré = côté × côté = 5 cm × 5 cm = 25 cm².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":62841,"question":"Quelle conversion est incorrecte ?","option_a":"1 m = 100 cm","option_b":"1 L = 1 000 mL","option_c":"1 kg = 1 000 g","option_d":"1 km = 100 m","option_e":"","option_f":"","bonne_reponse":"D","explication":"1 km = 1 000 m (et non 100 m). Les autres conversions sont correctes.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]