Quiz Sciences : Testez vos connaissances en 4ème année secondaire

Question 1 sur 10 10:00

[{"id":19668,"question":"Quelle est la formule de la vitesse moyenne ?","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 moyenne se calcule en divisant la distance parcourue (d) par le temps écoulé (t).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":19669,"question":"L'énergie cinétique dépend uniquement de la masse d'un objet.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"L'énergie cinétique dépend à la fois de la masse et de la vitesse de l'objet.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":19670,"question":"Quel gaz est responsable de l'effet de serre ?","option_a":"Oxygène","option_b":"Dioxyde de carbone","option_c":"Azote","option_d":"Hydrogène","option_e":"","option_f":"","bonne_reponse":"B","explication":"Le dioxyde de carbone (CO₂) est le principal gaz à effet de serre.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":19671,"question":"La loi d'Ohm s'exprime par la formule :","option_a":"U = R × I","option_b":"U = I \/ R","option_c":"U = R \/ I","option_d":"U = I + R","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},{"id":19672,"question":"La photosynthèse produit de l'oxygène.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"La photosynthèse produit de l'oxygène à partir de dioxyde de carbone et d'eau, en présence de lumière.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":19673,"question":"Quelle est l'unité de mesure de la force ?","option_a":"Newton","option_b":"Joule","option_c":"Watt","option_d":"Pascal","option_e":"","option_f":"","bonne_reponse":"A","explication":"La force s'exprime en newtons (N) dans le système international.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":19674,"question":"La tension électrique se mesure en :","option_a":"Ampères","option_b":"Volts","option_c":"Ohms","option_d":"Watts","option_e":"","option_f":"","bonne_reponse":"B","explication":"La tension électrique se mesure en volts (V).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":19675,"question":"La gravité est une force attractive.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"La gravité est une force attractive qui agit entre deux masses.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":19676,"question":"Quel est le symbole chimique de l'eau ?","option_a":"O₂","option_b":"H₂O","option_c":"CO₂","option_d":"NaCl","option_e":"","option_f":"","bonne_reponse":"B","explication":"Le symbole chimique de l'eau est H₂O.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":19677,"question":"La résistance électrique se mesure en :","option_a":"Ampères","option_b":"Volts","option_c":"Ohms","option_d":"Watts","option_e":"","option_f":"","bonne_reponse":"C","explication":"La résistance électrique se mesure en ohms (Ω).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]