This General Knowledge Trivia Is Teen-Tested, Brain-Approved

Mars is known as the Red Planet due to its reddish appearance, caused by iron oxide (rust) on its surface. The iron oxide gives the planet its distinctive color when viewed from Earth, making it easily recognizable and earning it the nickname "Red Planet".

The skin is the largest organ in the human body, covering an average of 20 square feet and weighing around 8 pounds. It serves as a protective barrier against external elements, regulates body temperature, and plays a crucial role in sensation and immune response. The skin is made up of multiple layers and structures, including hair follicles, sweat glands, and nerve endings, making it a complex and vital organ for overall health and well-being.

J.K. Rowling is the author of the Harry Potter series, which became a worldwide phenomenon. Her captivating storytelling and imaginative world-building have captured the hearts of readers of all ages, making Harry Potter one of the most beloved book series of all time.

Water is composed of two hydrogen atoms and one oxygen atom, hence the chemical symbol H₂O. The subscript "2" next to the hydrogen indicates that there are two hydrogen atoms in the molecule, while the "O" represents the oxygen atom. This chemical formula is used to represent the composition of water in a concise and standardized manner.

A leap year occurs every 4 years because the Earth's orbit around the sun takes approximately 365.24 days. To keep our calendar year synchronized with the astronomical year, an extra day is added to the calendar every four years. This extra day is February 29th, making that year a leap year with 366 days instead of the usual 365.

Paris is the capital of France. It is one of the most famous and iconic cities in the world, known for its rich history, culture, and landmarks such as the Eiffel Tower and Louvre Museum. Paris is also a major center for art, fashion, gastronomy, and commerce, making it a popular destination for tourists and a hub of international influence.

Da Vinci is credited with painting the Mona Lisa, one of the most famous and iconic works of art in the world. Leonardo da Vinci was a renowned Italian artist, inventor, and scientist during the Renaissance period. His artistic skill and attention to detail are evident in the masterpiece that is the Mona Lisa, which continues to captivate audiences with its enigmatic smile and intricate composition.

Diamond is considered the hardest natural substance on Earth due to its unique atomic structure. Each carbon atom in a diamond is bonded to four other carbon atoms in a tetrahedral structure, resulting in a strong and rigid three-dimensional network. This arrangement gives diamonds their exceptional hardness, making them resistant to scratching and maintaining their brilliance over time.

Plants absorb carbon dioxide from the atmosphere through tiny pores called stomata on their leaves. This process, known as photosynthesis, allows plants to convert carbon dioxide into oxygen and glucose, which they use as energy to grow and survive. Carbon dioxide is a crucial component for plant growth and is essential for the process of photosynthesis to occur.

The piano is a musical instrument that has keys for playing different notes, pedals for controlling sound and sustain, and strings that produce sound when struck by the keys. The keys are pressed to produce different pitches, the pedals are used to change the tone or sustain of the notes, and the strings vibrate to create sound when the keys are pressed.