scientist, discoveries & inventions MCQ section 2 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (b)

Seismography is the scientific measuring and recording of the shock and vibrations of earthquakes. The study of these records is known as seismology.

The instrument for automatically detecting and recording the intensity, direction, and duration of a movement of the ground, especially of an earthquake, is known as a seismograph.

Answer: (b)

Christian Neethling Barnard was a South African cardiac surgeon who performed the world’s first successful human-to-human heart transplant.

Following the first successful kidney transplant in 1953, in the United States, Barnard performed the first kidney transplant in South Africa in October 1967. Barnard experimented for several years with animal heart transplants.

More than 50 dogs received transplanted hearts. He performed the world’s first human heart transplant operation on 3 December 1967, in an operation assisted by his brother, Marius Barnard; the operation lasted nine hours and used a team of thirty people.

Answer: (d)

Answer: (d)

Answer: (b)

Radium, in the form of radium chloride, was discovered by Marie Curie and Pierre Curie in 1898. They extracted the radium compound from uraninite. In nature, radium is found in uranium ores in trace amounts as small as a seventh of a gram per ton of uraninite.