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3 questions about Science
Question 1Who observed in 1928 the antibacterial effect of a mold causing penicillin?See the answer +
The answer
Alexander Fleming
In 1928, Alexander Fleming noticed that a mold contaminating a culture of staphylococci prevented bacteria from growing around it. He identified the fungus as belonging to the genus “Penicillium” and named the antibacterial substance penicillin. Fleming published his results, but failed to…
Read the full explanationQuestion 2Who formulated the law of universal gravitation?See the answer +
The answer
Isaac Newton
Isaac Newton forever changed our understanding of the universe by formulating the law of universal gravitation in his work "Philosophiæ Naturalis Principia Mathematica," published in 1687. This law explained why apples fall to the ground and how planets orbit around the Sun.…
Read the full explanationQuestion 3Which inventor helped make an electric incandescent lighting system commercially practical in the late 19th century?See the answer +
The answer
Thomas Edison
Thomas Edison did not create the first incandescent electric lamp. Several inventors had obtained light by heating a filament, and Joseph Swan at the same time developed a practical lamp in the United Kingdom. In the late 1870s, Edison's laboratory team improved…
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Questions to explore
- Who invented the first vaccine, marking a turning point in the fight against infectious diseases?See the answer
- Which scientist is known for formulating the laws of genetic heredity?See the answer
- Who developed the first theory of evolution by natural selection?See the answer
- Who is credited with the invention of the compound microscope?See the answer
- Who developed the theory of relativity, revolutionizing our understanding of space and time?See the answer
- What experiment, conducted by James Chadwick in 1932, led to the discovery of a new particle that revolutionized our understanding of the atom?See the answer
- What name is given to the band of constellations located along the ecliptic?See the answer
- What is the Milky Way?See the answer
- What is commonly called a “shooting star” in the night sky?See the answer