Which of the following planets has the largest number of moons?
A Earth
B Mars
C Jupiter
D Saturn
Saturn has the largest number of known moons in the solar system — over 140 confirmed moons. Jupiter has slightly fewer, with around 95 known moons.
What is the chemical symbol for gold?
A Ag
B Au
C Gd
D Go
The symbol Au comes from the Latin word Aurum, meaning “shining dawn” or “glow of sunrise,” which refers to gold’s bright yellow color.
Which gas is essential for photosynthesis?
A Oxygen
B Nitrogen
C Carbon dioxide
D Hydrogen
Plants use carbon dioxide (CO₂), water, and sunlight to produce glucose and oxygen in photosynthesis. Oxygen is actually a byproduct of the process.
What part of the cell is known as the “powerhouse”?
A Nucleus
B Ribosome
C Mitochondria
D Golgi apparatus
The mitochondria generate energy for the cell by converting glucose into ATP (adenosine triphosphate) through cellular respiration, earning them the nickname “powerhouse of the cell.”
Sound travels fastest through which medium?
A Air
B Water
C Steel
D Vacuum
Sound travels fastest in solids because particles are tightly packed and transmit vibrations more efficiently. In steel, sound travels about 15 times faster than in air.