Space & the Universe

Q: How fast does light travel in vacuum?

300,000 km/s. Light travels at approximately 299,792 kilometers per second (about 300,000 km/s) through the vacuum of space, a fundamental constant denoted by the letter 'c' in physics. This speed is the cosmic speed limit—nothing with mass can travel faster. The precise value of the speed of light was established through countless experiments and is now defined as an exact value in the International System of Units.

Q: What is the name of the protein in red blood cells that carries oxygen?

Hemoglobin. Hemoglobin is the iron-containing protein responsible for binding and transporting oxygen throughout the body. Each hemoglobin molecule consists of four subunits, each containing an iron atom at its core, allowing it to bind reversibly to oxygen molecules in the lungs and release them to tissues that need them. The iron in hemoglobin is also what gives blood its characteristic red color, and this elegant protein is crucial to every aerobic organism's survival.

Q: Which type of animal is a seahorse?

Fish. Despite their unusual horse-like head and prehensile tail, seahorses are fish belonging to the family Syngnathidae. They possess all the defining characteristics of fish: gills for extracting oxygen from water, a swim bladder for buoyancy control, and fins for navigation. Their evolutionary adaptation to a specialized ecological niche in seagrass beds and coral reefs explains their morphological uniqueness compared to typical streamlined fish.

Q: Which disease is caused by a deficiency of vitamin C?

Scurvy. Scurvy results from prolonged vitamin C (ascorbic acid) deficiency, preventing the body's synthesis of collagen, a crucial structural protein. This leads to weakened connective tissues, bleeding gums, tooth loss, poor wound healing, and reopening of old wounds—devastating consequences for long-distance sailors with limited access to fresh produce. The disease was responsible for more naval deaths in the Age of Exploration than combat, until the adoption of citrus provisions proved effective prevention.

Q: What is the SI unit of electric current?

Ampere. The ampere, often abbreviated as 'amp' or represented by the symbol 'A,' is the International System of Units (SI) standard for measuring electric current. One ampere is defined as one coulomb of electric charge flowing past a point per second. Named after French physicist André-Marie Ampère, this unit quantifies the rate of electron flow through a conductor and forms the foundation for understanding electrical circuits and power systems.

Q: What is the scientific study of minerals specifically called?

Mineralogy. Mineralogy is the specialized Earth science discipline focused on minerals—naturally occurring, inorganic crystalline solids with definite chemical compositions. Mineralogists classify minerals by their crystal systems, physical properties, and chemical formulas. While geology is the broader study of Earth's composition and processes, and petrology examines rocks themselves, mineralogy provides the foundational knowledge for understanding Earth's mineral resources, gem formation, and crustal composition.

Q: What does DNA stand for?

Deoxyribonucleic acid. DNA stands for deoxyribonucleic acid, the complex polymer molecule that encodes genetic instructions for building and maintaining living organisms. The name reflects its chemical structure: 'deoxy' refers to the five-carbon sugar lacking one oxygen (deoxyribose), and 'nucleic acid' describes the phosphate-sugar backbone with nitrogenous bases. DNA molecules consist of two complementary strands wound in a double helix, containing sequences of four bases (adenine, cytosine, guanine, thymine) that form a genetic code. This molecular blueprint has remained largely unchanged for billions of years, serving as the basis of heredity across all life.

Q: What is the SI unit of electric current?

Ampere. The ampere (A), also called the amp, is the SI base unit of electric current, named after French physicist André-Marie Ampère. Electric current measures the flow of electrons through a conductor, defined as the amount of charge (in coulombs) passing a point per unit time. One ampere equals one coulomb of charge per second. This fundamental unit is essential in electrical engineering, physics, and circuit analysis. The magnitude of amperage determines heating effects in wires, the brightness of lights, and the power consumption of electrical devices.

Q: Which of these mammals is known for its inability to jump despite its size?

Elephant. Elephants cannot jump due to their skeletal anatomy and extreme body weight distribution. Their bones are structured for weight-bearing rather than explosive propulsion, and the muscle-to-body-mass ratio necessary for jumping at their scale is biomechanically impossible. While elephants can reach speeds of 25 mph in a gallop with all four feet briefly leaving the ground simultaneously, this sustained running differs fundamentally from the coordinated muscular effort required for true jumping.

Q: What is the only letter that does not appear on the periodic table of elements?

J. The letter 'J' is the only letter of the English alphabet that does not appear in any chemical element's symbol on the periodic table. This stems from historical conventions in element naming and the influence of Latin chemical nomenclature. When the periodic table was formalized in the late 1800s, element symbols were assigned based on scientific naming traditions. The absence of 'J' is a quirk of this historical process rather than any chemical principle. All other 25 letters of the alphabet appear at least once among the 118 element symbols.

Question 1

How fast does light travel in vacuum?

Accepted Answer

300,000 km/s

Answer

150,000 km/s

Answer

450,000 km/s

Answer

600,000 km/s

Question 2

What is the name of the protein in red blood cells that carries oxygen?

Accepted Answer

Hemoglobin

Answer

Myoglobin

Answer

Chlorophyll

Answer

Albumin

Question 3

Which type of animal is a seahorse?

Accepted Answer

Fish

Answer

Mollusk

Answer

Crustacean

Answer

Mammal

Question 4

Which disease is caused by a deficiency of vitamin C?

Accepted Answer

Scurvy

Answer

Beriberi

Answer

Pellagra

Answer

Rickets

Question 5

What is the SI unit of electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Watt

Question 6

What is the scientific study of minerals specifically called?

Accepted Answer

Mineralogy

Answer

Paleontology

Answer

Geology

Answer

Petrology

Question 7

What does DNA stand for?

Accepted Answer

Deoxyribonucleic acid

Answer

Diribonucleic acid

Answer

Deoxyribose nucleotide assay

Answer

Diadenine nucleic acid

Question 8

What is the SI unit of electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Watt

Question 9

Which of these mammals is known for its inability to jump despite its size?

Accepted Answer

Elephant

Answer

Hippopotamus

Answer

Rhinoceros

Answer

Sloth

Question 10

What is the only letter that does not appear on the periodic table of elements?

Accepted Answer

J

Answer

Q

Answer

X

Answer

Z

Quiz Author

Space & the Universe