Science Quiz #1 – Test Your Knowledge of the Natural World Think you know your science? ⚗️ Try these 10 interesting multiple-choice questions covering biology, physics, and chemistry. Click “Show answer” after each question to see how well you did! What is the chemical symbol for water? A) H2 B) O2 C) H2O D) HO2 Show answer C) H2O Which part of the cell contains the genetic material (DNA)? A) Cytoplasm B) Nucleus C) Mitochondria D) Ribosome Show answer B) Nucleus What gas do humans exhale? A) Oxygen B) Nitrogen C) Carbon dioxide D) Hydrogen Show answer C) Carbon dioxide What planet is closest to the Sun? A) Venus B) Mercury C) Earth D) Mars Show answer B) Mercury Which vitamin is produced when the human skin is exposed to sunlight? A) Vitamin A B) Vitamin B C) Vitamin C D) Vitamin D Show answer D) Vitamin D What force keeps the planets in orbit around the Sun? A) Magnetism B) Gravity ...