Tag: science & technology

A hygrometer is the scientific instrument specifically designed to measure relative humidity in the atmosphere. A barometer measures air pressure, while a thermometer measures temperature. 'Humidmeter' is not a standard scientific instrument.

Marie and Pierre Curie discovered radium in 1898 while studying pitchblende, a uranium-rich ore. Frederick Soddy worked on radioactive decay theory but did not discover radium. Michael Radium is not a known scientist, and Enrico Fermi was a nuclear physicist who came decades later.

Galileo discovered the isochronism of the pendulum in 1583 - that a pendulum's period depends only on its length, not the amplitude of swing. The telescope was his invention, not a discovery. Distoscope is not a real scientific instrument, and alarm clocks are unrelated to Galileo's work.

Aristotle is often called the father of biology for his systematic classification and study of over 500 animal species. Robert Hooke discovered cells but came much later (17th century). J.C. Bose worked on plant physiology in modern times, and Enrico Fermi was a nuclear physicist.

Oxygen has 8 protons in its nucleus, giving it atomic number 8. Carbon has atomic number 6, sulfur has 16, and germanium has 32. The atomic number defines an element and equals its proton count.

Proteins are polymers composed of amino acids linked by peptide bonds. Acetic acid is a simple organic acid. Gossypium hirsutum is the scientific name for cotton. Fats and vitamins are completely different classes of biomolecules.

An ammeter (from 'ampere-meter') measures electric current in amperes. Electromagnetic fields are measured by gaussmeters. Light intensity is measured by photometers or lux meters. Loudness is measured in decibels using sound level meters.

Insectivorous plants like the Venus flytrap derive nutrients by trapping and consuming insects. Option A is misspelled. 'Carnivorous' is technically correct but 'insectivorous' is the more precise scientific term. Petrosorous is not a real term.

Ichthyology is the study of fish (note: standard spelling includes 'h' after 't'). Ornithology studies birds, entomology studies insects, and herpetology studies reptiles and amphibians.

Osteology is the scientific study of bones, including their structure, function, development, and pathology. Entomology studies insects. Ornithology studies birds. Herpetology studies reptiles and amphibians.