Quiz — correction serie 8 Sc 2020.pdf

Question 1 sur 10 20:00

[{"id":34570,"question":"Quel est l'unité de mesure de la force dans le système international ?","option_a":"Newton (N)","option_b":"Pascal (Pa)","option_c":"Joule (J)","option_d":"Watt (W)","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'unité de force dans le système international est le Newton (N), en hommage à Isaac Newton.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Newton (N)\", \"b\": \"Pascal (Pa)\", \"c\": \"Joule (J)\", \"d\": \"Watt (W)","_debug_options_count":4},{"id":34571,"question":"La tension électrique se mesure avec un voltmètre branché en série dans le circuit.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Un voltmètre se branche toujours en parallèle pour mesurer la tension aux bornes d'un dipôle.","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":34572,"question":"Quelle est la formule de la loi d'Ohm ?","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'exprime par 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":34573,"question":"Dans une réaction chimique, la masse totale des produits est toujours égale à la masse totale des réactifs.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"C'est le principe de conservation de la masse, énoncé par Lavoisier : rien ne se perd, rien ne se crée, tout se transforme.","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":34574,"question":"Quel gaz est produit lors de la photosynthèse ?","option_a":"Oxygène (O₂)","option_b":"Dioxyde de carbone (CO₂)","option_c":"Azote (N₂)","option_d":"Hydrogène (H₂)","option_e":"","option_f":"","bonne_reponse":"a","explication":"La photosynthèse produit de l'oxygène (O₂) à partir de dioxyde de carbone et d'eau, 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\": \"Oxygène (O₂)\", \"b\": \"Dioxyde de carbone (CO₂)\", \"c\": \"Azote ","_debug_options_count":4},{"id":34575,"question":"La vitesse de la lumière dans le vide est d'environ :","option_a":"300 000 km\/s","option_b":"30 000 km\/s","option_c":"3 000 km\/s","option_d":"300 km\/s","option_e":"","option_f":"","bonne_reponse":"a","explication":"La vitesse de la lumière dans le vide est une constante fondamentale égale à 299 792 458 m\/s, soit environ 300 000 km\/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\": \"30 000 km\/s\", \"c\": \"3 000 km\/s\", \"d\": \"300 k","_debug_options_count":4},{"id":34576,"question":"Un atome est principalement constitué de :","option_a":"Protons et neutrons","option_b":"Électrons et neutrons","option_c":"Protons et électrons","option_d":"Noyau et électrons","option_e":"","option_f":"","bonne_reponse":"d","explication":"Un atome est composé d'un noyau (protons et neutrons) autour duquel gravitent les électrons.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"d\", \"options\": {\"a\": \"Protons et neutrons\", \"b\": \"Électrons et neutrons\", \"c\": \"Proton","_debug_options_count":4},{"id":34577,"question":"La force gravitationnelle entre deux corps dépend de :","option_a":"Leur masse et la distance qui les sépare","option_b":"Leur vitesse et leur température","option_c":"Leur couleur et leur forme","option_d":"Leur charge électrique","option_e":"","option_f":"","bonne_reponse":"a","explication":"La force gravitationnelle est proportionnelle au produit des masses et inversement proportionnelle au carré de la distance (loi de Newton).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Leur masse et la distance qui les sépare\", \"b\": \"Leur vitesse et","_debug_options_count":4},{"id":34578,"question":"Le pH d'une solution acide est toujours inférieur à 7.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Un pH inférieur à 7 indique une solution acide, tandis qu'un pH supérieur à 7 indique une solution basique.","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":34579,"question":"Quelle est la formule chimique de l'eau ?","option_a":"H₂O","option_b":"CO₂","option_c":"O₂","option_d":"H₂SO₄","option_e":"","option_f":"","bonne_reponse":"a","explication":"La formule chimique de l'eau est H₂O, composée de deux atomes d'hydrogène et d'un atome d'oxygène.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"H₂O\", \"b\": \"CO₂\", \"c\": \"O₂\", \"d\": \"H₂SO₄\"}}","_debug_options_count":4}]