Quiz — Ordre de grandeur et conversion d’unités.pdf

Question 1 sur 10 20:00

[{"id":13443,"question":"Quelle est l'ordre de grandeur de 0,0045 kg en grammes ?","option_a":"10⁻³ g","option_b":"10⁻² g","option_c":"10⁻¹ g","option_d":"10⁰ g","option_e":"","option_f":"","bonne_reponse":"a","explication":"0,0045 kg = 4,5 g. L'ordre de grandeur de 4,5 est 10⁰ (1), donc 10⁻¹ g est l'ordre de grandeur le plus proche.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"10⁻³ g\", \"b\": \"10⁻² g\", \"c\": \"10⁻¹ g\", \"d\": \"10⁰ g\"}}","_debug_options_count":4},{"id":13444,"question":"Convertir 3,6 km en mètres.","option_a":"36 m","option_b":"360 m","option_c":"3 600 m","option_d":"36 000 m","option_e":"","option_f":"","bonne_reponse":"c","explication":"1 km = 1 000 m. Donc 3,6 km = 3,6 × 1 000 = 3 600 m.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"36 m\", \"b\": \"360 m\", \"c\": \"3 600 m\", \"d\": \"36 000 m\"}}","_debug_options_count":4},{"id":13445,"question":"Vrai ou Faux ? 1 L = 1 dm³.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"1 litre est défini comme égal à 1 décimètre cube (dm³), donc l'affirmation est vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":13446,"question":"Quelle est la conversion correcte de 500 cm en mètres ?","option_a":"0,5 m","option_b":"5 m","option_c":"50 m","option_d":"0,05 m","option_e":"","option_f":"","bonne_reponse":"a","explication":"1 m = 100 cm. Donc 500 cm = 500 \/ 100 = 5 m. L'option 0,5 m est incorrecte.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"0,5 m\", \"b\": \"5 m\", \"c\": \"50 m\", \"d\": \"0,05 m\"}}","_debug_options_count":4},{"id":13447,"question":"Vrai ou Faux ? Pour convertir des grammes en kilogrammes, on multiplie par 1 000.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Pour convertir des grammes en kilogrammes, on divise par 1 000, car 1 kg = 1 000 g. Multiplier par 1 000 serait incorrect.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":13448,"question":"Quelle est l'unité de base du système international pour la masse ?","option_a":"Gramme","option_b":"Kilogramme","option_c":"Livre","option_d":"Tonne","option_e":"","option_f":"","bonne_reponse":"b","explication":"L'unité de base pour la masse dans le système international est le kilogramme (kg).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Gramme\", \"b\": \"Kilogramme\", \"c\": \"Livre\", \"d\": \"Tonne\"}}","_debug_options_count":4},{"id":13449,"question":"Convertir 2,5 heures en secondes.","option_a":"900 s","option_b":"1 500 s","option_c":"9 000 s","option_d":"90 000 s","option_e":"","option_f":"","bonne_reponse":"c","explication":"1 heure = 3 600 secondes. Donc 2,5 heures = 2,5 × 3 600 = 9 000 secondes.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"900 s\", \"b\": \"1 500 s\", \"c\": \"9 000 s\", \"d\": \"90 000 s\"}}","_debug_options_count":4},{"id":13450,"question":"Vrai ou Faux ? L'ordre de grandeur de 789 est 10³.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'ordre de grandeur de 789 est 10², car 789 est compris entre 10² (100) et 10³ (1 000), et plus proche de 10².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":13451,"question":"Quelle est la conversion correcte de 0,25 m en centimètres ?","option_a":"2,5 cm","option_b":"25 cm","option_c":"250 cm","option_d":"0,025 cm","option_e":"","option_f":"","bonne_reponse":"b","explication":"1 m = 100 cm. Donc 0,25 m = 0,25 × 100 = 25 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"2,5 cm\", \"b\": \"25 cm\", \"c\": \"250 cm\", \"d\": \"0,025 cm\"}}","_debug_options_count":4},{"id":13452,"question":"Vrai ou Faux ? Pour convertir des litres en mètres cubes, on multiplie par 0,001.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"1 m³ = 1 000 L. Donc pour convertir des litres en mètres cubes, on divise par 1 000 ou multiplie par 0,001. L'affirmation est vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4}]