1 Amphibians-Amphibians (class Amphibia) are a taxon of animals that include all tetrapods, four-legged vertebrates, that do not have amniotic eggs. 2  Fish-A fish is a water-dwelling vertebrate with gills. 3  Most are cold-blooded. 4  There are over 29,000 species of fish, making them the most diverse group of vertebrates.
The instrument used to measure earthquakes is called a seismometer, which measures the motions of the ground. The old term for this was a seismograph (where the equipment for measuring and plotting the data was combined unlike in the modern equipment where these functions are separate).
Seismogram âA real-time record of earthquake ground motion recorded by a seismograph. Seismograms are the records (paper copy or computer image) used to calculate the location and magnitude of an earthquake. . Seismograph âan instrument that records vibrations of the Earth, especially earthquakes. Seismograph generally refers to the seismometer and a recording device as a single unit.. See IRISâ Seismographs. Seismometerâ a sensitive instrument that can detect waves emitted by even the smallest earthquakes.