Grade 6th General Knowledge Quiz: Test Your Smartness Today!

|Mars appears red because its surface materials contain abundant iron oxide, commonly called rust. Orbital spectrometers and rover analyses identify iron-bearing minerals that oxidized under ancient conditions; fine dust rich in these minerals is transported by global winds and coats plains and dunes, producing a persistent reddish hue when sunlight scatters. Comparative laboratory spectroscopy matches Martian spectra to known iron oxides, enabling quantitative estimates of oxide abundance. Remote sensing measurements combined with in situ soil chemistry provide converging evidence that iron oxidation is the primary cause of Mars’s red appearance. This distinctive coloration gives Mars its nickname, the Red Planet. |

H2O denotes water, a molecule with two hydrogen atoms covalently bonded to one oxygen atom. Atomic masses—approximately 1.008 for hydrogen and 16.00 for oxygen—sum to a molecular mass near 18.016 atomic mass units, so one mole of water has mass about 18.016 grams. Oxygen’s greater electronegativity creates a permanent dipole, producing strong intermolecular hydrogen bonds that elevate boiling and melting points relative to comparable small molecules. Quantitatively, hydrogen bonding increases cohesion, yields high specific heat capacity, and underpins water’s role as a universal solvent essential to biological and environmental systems. These properties enable water to sustain life globally on Earth |

Photosynthesis converts carbon dioxide and water into glucose and oxygen using sunlight energy, commonly represented by the balanced equation: 6 CO2 + 6 H2O → C6H12O6 + 6 O2. Carbon dioxide supplies the carbon atoms that become the backbone of glucose; stoichiometry shows six carbon dioxide molecules provide six carbon atoms to assemble one glucose molecule. Gas-exchange experiments and chlorophyll fluorescence measurements demonstrate CO2 uptake rates directly limit carbon fixation under non-light-limited conditions. Quantitatively, reducing atmospheric CO2 concentration reduces theoretical maximum carbon assimilation proportionally, altering growth rates and biomass accumulation over time. This centrality makes CO2 essential for plant life. |

Male penguins are known for their active involvement in parenting. After the female lays the egg, she transfers it to the male penguin, who then incubates it by keeping it warm on his feet. The male penguin stays with the egg while the female goes to hunt for food. Once the chick hatches, both parents take turns feeding and caring for it until it is old enough to fend for itself. This behavior is commonly observed in many penguin species, making the statement "A male penguin takes care of its young" true.

Jakarta is the correct answer because it has been the capital of Indonesia since the country’s independence in 1945. It lies on the northwest coast of Java, the world’s most populated island. Buenos Aires, though sometimes confused due to its global prominence, is the capital of Argentina. Manila is the capital of the Philippines, and Bangkok is the capital of Thailand. Jakarta serves as Indonesia’s economic, political, and cultural hub. With more than 10 million residents, its urban growth reflects Indonesia’s central role in Southeast Asia, making Jakarta’s identity as the nation’s capital historically and geopolitically well established.

Identifying the longest river requires defining a measurable source, a continuous main stem and the mouth; different choices change outcomes. Historically the Nile was cited as the longest because its chosen headwaters trace far into inland Africa; alternative measurements that select Amazon tributaries can lengthen that system, changing ranking. Satellite mapping and digital elevation models enable precise channel tracing and meander corrections; hydrologists sum segment lengths and apply geometric corrections for bends to compute total length. When comparing datasets, small changes in source selection or measurement resolution produce kilometre-scale differences that determine whether the Nile or Amazon ranks first. Precisely. |

Portuguese became Brazil’s primary language because Portugal established colonial control beginning in the early 1500s and implemented institutions—administration, church, and schooling—that used Portuguese as the language of record. Over successive centuries, these institutions expanded to cover a vast territory, converting diverse Indigenous and immigrant populations through education and legal systems. Language transmission occurred through family, school curricula, and centralized media; the cumulative effect is near-universal adoption across regions. Analytically, multiplying generations of institutional influence by national-level broadcasting and education explains how a single colonial language displaced local tongues to become Brazil’s dominant national language. This created linguistic cohesion across Brazil. |

The real name of Mother Teresa was Agnes.

Lake Baikal, located in Siberia, Russia, is both the deepest and largest freshwater lake by volume. It reaches a depth of 1,642 meters and contains approximately 20% of the world’s unfrozen freshwater. In contrast, Lake Victoria in Africa has a greater surface area but only about 80 meters average depth, making it shallow compared to Baikal. The Caspian Sea, though larger, is technically classified as a saltwater lake, not freshwater. The Great Lakes of North America, while vast, do not surpass Baikal’s volume or depth. Scientific measurements and geological data confirm Baikal’s unmatched global freshwater capacity.

Mount Vesuvius is located in Italy. This active volcano is situated on the Gulf of Naples, near the city of Naples. It is one of the most famous volcanoes in the world, known for its eruption in 79 AD that buried the ancient cities of Pompeii and Herculaneum under volcanic ash and debris. The location of Mount Vesuvius in Italy is well-known and documented in history and geography.