Science shapes everything around us, from the atoms in your body to the stars in the sky. This science quiz covers key concepts across biology, chemistry, physics, and astronomy. Whether you're a student, a science enthusiast, or just curious, these 10 questions will challenge what you know.
Q: Why are mitochondria called the powerhouse of the cell?
A: They produce ATP, the energy currency used by cells for all biological processes.
Mitochondria convert glucose and oxygen into ATP through a process called cellular respiration (oxidative phosphorylation). A single cell may contain hundreds to thousands of mitochondria.
Q: How does Newton's First Law apply in everyday life?
A: It explains why seatbelts are necessary and why objects slide when you brake suddenly.
When a car stops suddenly, your body continues forward due to inertia (Newton's First Law). A seatbelt provides the external force needed to change your body's motion along with the car.
Q: Who discovered DNA's double helix structure?
A: James Watson and Francis Crick in 1953, using X-ray data from Rosalind Franklin.
Watson and Crick published the double helix model in 1953. Rosalind Franklin's X-ray crystallography images (especially 'Photo 51') were crucial to the discovery, though she was not credited equally at the time.
Hydrogen is the most abundant element in the universe, making up about 73% of all visible matter.
DNA is made of nucleotides, each consisting of a sugar (deoxyribose), a phosphate group, and one of four nitrogen bases: adenine, thymine, guanine, or cytosine.
The Sun is approximately 4.6 billion years old.
Sound travels at approximately 343 meters per second (1,235 km/h) in dry air at 20°C.
As of 2024, there are 118 confirmed elements on the periodic table.