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Question 1 sur 10 10:00

[{"id":74972,"question":"Quelle est la formule de la vitesse (v) en fonction de la distance (d) et du temps (t) ?","option_a":"v = d × t","option_b":"v = d \/ t","option_c":"v = t \/ d","option_d":"v = d + t","option_e":"","option_f":"","bonne_reponse":"B","explication":"La vitesse est calculée en divisant la distance parcourue par le temps mis pour la parcourir : v = d \/ t.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":74973,"question":"Un atome est composé de protons, neutrons et électrons. Vrai ou Faux ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Un atome est bien composé de protons (chargés positivement), neutrons (neutres) et électrons (chargés négativement).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":74974,"question":"Quel gaz est produit lors de la photosynthèse ?","option_a":"Oxygène (O₂)","option_b":"Dioxyde de carbone (CO₂)","option_c":"Hydrogène (H₂)","option_d":"Azote (N₂)","option_e":"","option_f":"","bonne_reponse":"A","explication":"La photosynthèse produit de l'oxygène (O₂) en plus du glucose, à partir de dioxyde de carbone et d'eau.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":74975,"question":"La force de frottement s'oppose toujours au mouvement d'un objet. Vrai ou Faux ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"La force de frottement s'oppose toujours au mouvement relatif entre deux surfaces en contact.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":74976,"question":"Quel est le symbole chimique de l'or ?","option_a":"Ag","option_b":"Au","option_c":"Fe","option_d":"Cu","option_e":"","option_f":"","bonne_reponse":"B","explication":"Le symbole chimique de l'or est Au, issu du latin 'Aurum'.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":74977,"question":"La Terre tourne autour du Soleil en 24 heures. Vrai ou Faux ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"La Terre met environ 365 jours (1 an) pour faire un tour complet autour du Soleil.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":74978,"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},{"id":74979,"question":"Les plantes vertes absorbent la lumière du Soleil pour produire de l'énergie. Vrai ou Faux ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Les plantes vertes utilisent la lumière du Soleil lors de la photosynthèse pour produire de l'énergie sous forme de glucose.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":74980,"question":"Quel est le nom de la force qui attire les objets vers le centre de la Terre ?","option_a":"Force magnétique","option_b":"Force de pesanteur","option_c":"Force électrique","option_d":"Force de frottement","option_e":"","option_f":"","bonne_reponse":"B","explication":"La force qui attire les objets vers le centre de la Terre est appelée force de pesanteur ou gravité.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":74981,"question":"Un mélange homogène est toujours liquide. Vrai ou Faux ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"Un mélange homogène peut être solide (ex : alliage), liquide (ex : eau salée) ou gazeux (ex : air).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]