Moderate Category

The chemical element with the atomic number 1, and the simplest atom, is

• Helium
• Hydrogen
• Lithium
• Oxygen

The chemical compound that makes up table salt is

• CaCO3 (Calcium Carbonate)
• NaCl (Sodium Chloride)
• KOH (Potassium Hydroxide)
• H2SO4 (Sulfuric Acid)

The first artificial Earth satellite, launched by the Soviet Union in 1957, was called

• Explorer 1
• Sputnik 1
• Luna 1
• Vanguard 1

The theory of relativity, which revolutionized our understanding of gravity and space-time, was developed by which physicist?

• Isaac Newton
• Albert Einstein
• Stephen Hawking
• Galileo Galilei

The chemical element with the symbol "Au" is known for its bright yellow color and use in jewelry. What is the name of this element?

• Silver
• Copper
• Gold
• Platinum

Aquaponics is a method of growing plants that combines which two agricultural techniques?

• Crop rotation and hydroponics
• Monoculture and intercropping
• Plowing and terracing
• Herbicide use and organic farming

Photosynthesis, the process by which plants convert sunlight into energy, primarily occurs in which plant organ?

• Roots
• Stems
• Leaves
• Flowers

The scientific study of the Earth's atmosphere is known as

• Geology
• Oceanography
• Meteorology
• Hydrology

The world's most populous city, with over 37 million residents, is

• Tokyo
• Delhi
• Shanghai
• Sao Paulo

Quasars, some of the most luminous objects in the universe, are believed to be powered by what phenomenon?

• Nuclear fusion
• Asteroidal collisions
• Gravitational collapse of a star
• Chemical reactions on a planetary surface