scientist, discoveries & inventions MCQ section 1 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (c)

Orology is the branch of physical geography dealing with mountains. It is a field of research that regionally concentrates on the Earth's surface's part covered by mountain landscapes.

Answer: (a)

Seismology is the study of earthquakes and seismic waves that move through and around the earth. The field also includes studies of earthquake environmental effects, such as tsunamis as well as diverse seismic sources such as volcanic, tectonic, oceanic, atmospheric, and artificial processes.

Answer: (d)

X-radiation (composed of X-rays) is a form of electromagnetic radiation.

X-rays have a wavelength in the range of 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3×1016 Hz to 3×1019 Hz) and energies in the range 100 eV to 100 keV. They are shorter in wavelength than UV rays and longer than gamma rays.

In many languages, X-radiation is called Röntgen radiation, after Wilhelm Röntgen, who is usually credited as its discoverer, and who had named it X-radiation to signify an unknown type of radiation.

Answer: (c)

Answer: (d)