Quiz de révision : Sciences 4ème année secondaire

Question 1 sur 10 10:00

[{"id":75982,"question":"Quelle est la formule de la vitesse en mécanique ?","option_a":"v = d\/t","option_b":"v = t\/d","option_c":"v = m\/d","option_d":"v = F\/m","option_e":"","option_f":"","bonne_reponse":"A","explication":"La vitesse est définie comme la distance parcourue divisée par le temps écoulé : v = d\/t.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":75983,"question":"Un acide a un pH inférieur à 7.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":75984,"question":"Quelle est l'unité de mesure de la tension électrique ?","option_a":"Volt (V)","option_b":"Ampère (A)","option_c":"Ohm (Ω)","option_d":"Watt (W)","option_e":"","option_f":"","bonne_reponse":"A","explication":"La tension électrique se mesure en volts (V), symbole V.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":75985,"question":"La photosynthèse produit-elle de l'oxygène ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"La photosynthèse permet aux plantes de produire de l'oxygène à partir de dioxyde de carbone et d'énergie lumineuse.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":75986,"question":"Quelle est la loi d'Ohm ?","option_a":"U = R\/I","option_b":"U = R×I","option_c":"I = R×U","option_d":"R = U\/I","option_e":"","option_f":"","bonne_reponse":"B","explication":"La loi d'Ohm stipule que la tension U est égale au produit de la résistance R par l'intensité I : U = R×I.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":75987,"question":"Un écosystème est composé uniquement d'éléments vivants.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"Un écosystème inclut à la fois des éléments vivants (biotiques) et non vivants (abiotiques).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":75988,"question":"Quelle est la formule de la concentration molaire ?","option_a":"C = n\/V","option_b":"C = V\/n","option_c":"C = m\/V","option_d":"C = n×m","option_e":"","option_f":"","bonne_reponse":"A","explication":"La concentration molaire C est définie comme le nombre de moles n divisé par le volume V : C = n\/V.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":75989,"question":"La mitose produit-elle des cellules haploïdes ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"La mitose produit des cellules diploïdes identiques à la cellule mère, tandis que la méiose produit des cellules haploïdes.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":75990,"question":"Quelle est l'unité de mesure de l'énergie en physique ?","option_a":"Joule (J)","option_b":"Newton (N)","option_c":"Pascal (Pa)","option_d":"Watt (W)","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'énergie se mesure en joules (J) dans le système international.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":75991,"question":"Un gène est une portion d'ADN qui code pour une protéine.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Un gène est bien une séquence d'ADN qui contient l'information nécessaire à la synthèse d'une protéine.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]