Quiz — item 17 2015 Coma-éval f.pdf

Question 1 sur 10 20:00

[{"id":38140,"question":"Quelle est l'unité de mesure de l'intensité du courant électrique dans le système international ?","option_a":"Ampère (A)","option_b":"Volt (V)","option_c":"Ohm (Ω)","option_d":"Watt (W)","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'unité de mesure de l'intensité du courant électrique est l'ampère (A), du nom du physicien André-Marie Ampère.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Ampère (A)\", \"b\": \"Volt (V)\", \"c\": \"Ohm (Ω)\", \"d\": \"Watt (W)\"}}","_debug_options_count":4},{"id":38141,"question":"La photosynthèse permet aux plantes de produire du dioxygène à partir de dioxyde de carbone et d'eau.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La photosynthèse produit bien du dioxygène (O₂) en utilisant le dioxyde de carbone (CO₂) et l'eau (H₂O) en présence de lumière.","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":38142,"question":"Quel est le symbole chimique de l'élément oxygène ?","option_a":"Ox","option_b":"O","option_c":"Oy","option_d":"Og","option_e":"","option_f":"","bonne_reponse":"b","explication":"Le symbole chimique de l'oxygène est 'O', premier élément du groupe des chalcogènes.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Ox\", \"b\": \"O\", \"c\": \"Oy\", \"d\": \"Og\"}}","_debug_options_count":4},{"id":38143,"question":"La vitesse de la lumière dans le vide est d'environ :","option_a":"300 000 km\/s","option_b":"300 000 m\/s","option_c":"300 000 km\/h","option_d":"150 000 km\/s","option_e":"","option_f":"","bonne_reponse":"a","explication":"La vitesse de la lumière dans le vide est d'environ 300 000 kilomètres par seconde (3 × 10⁸ m\/s).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"300 000 km\/s\", \"b\": \"300 000 m\/s\", \"c\": \"300 000 km\/h\", \"d\": \"150","_debug_options_count":4},{"id":38144,"question":"Les mitochondries sont des organites cellulaires responsables de la respiration cellulaire.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Les mitochondries sont bien les 'centrales énergétiques' de la cellule, où se déroule la respiration cellulaire.","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":38145,"question":"Quel est le pH d'une solution neutre ?","option_a":"pH = 0","option_b":"pH = 7","option_c":"pH = 14","option_d":"pH = 10","option_e":"","option_f":"","bonne_reponse":"b","explication":"Une solution neutre a un pH de 7. En dessous, elle est acide ; au-dessus, basique.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"pH = 0\", \"b\": \"pH = 7\", \"c\": \"pH = 14\", \"d\": \"pH = 10\"}}","_debug_options_count":4},{"id":38146,"question":"La loi d'Ohm s'exprime par la formule :","option_a":"U = R × I","option_b":"P = U × I","option_c":"E = m × g × h","option_d":"F = m × a","option_e":"","option_f":"","bonne_reponse":"a","explication":"La loi d'Ohm s'écrit U = R × I, où U est la tension, R la résistance et I l'intensité du courant.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"U = R × I\", \"b\": \"P = U × I\", \"c\": \"E = m × g × h\", \"d\": \"F =","_debug_options_count":4},{"id":38147,"question":"Les gaz à effet de serre contribuent au réchauffement climatique.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Les gaz à effet de serre (comme le CO₂) piègent la chaleur dans l'atmosphère, augmentant ainsi les températures mondiales.","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":38148,"question":"Quel est le nom de la force qui maintient les planètes en orbite autour du Soleil ?","option_a":"Force magnétique","option_b":"Force gravitationnelle","option_c":"Force électrique","option_d":"Force nucléaire","option_e":"","option_f":"","bonne_reponse":"b","explication":"La force gravitationnelle, décrite par Newton, maintient les planètes en orbite autour du Soleil.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Force magnétique\", \"b\": \"Force gravitationnelle\", \"c\": \"Force é","_debug_options_count":4},{"id":38149,"question":"La molécule d'eau (H₂O) est composée de :","option_a":"2 atomes d'hydrogène et 1 atome d'oxygène","option_b":"1 atome d'hydrogène et 2 atomes d'oxygène","option_c":"2 atomes d'oxygène et 1 atome d'hydrogène","option_d":"1 atome de carbone et 2 atomes d'oxygène","option_e":"","option_f":"","bonne_reponse":"a","explication":"La molécule d'eau est composée de 2 atomes d'hydrogène (H) et 1 atome d'oxygène (O), d'où sa formule H₂O.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"2 atomes d'hydrogène et 1 atome d'oxygène\", \"b\": \"1 atome d'hyd","_debug_options_count":4}]