The Chinese people invented the Seismometer during the Han dynasty to help predict natural disasters. The Seismometer measured the motion of the ground, and things included of seismic waves such as, earthquakes, volcanoes, and other things that involve explosions that are generated by seismic waves.
Answer:
paleoecology
Explanation:
because because they study fossil of animals and plants. If it's an old rat's nest it will most likely contain fossils.
Great Britain, France, The United States and The Soviet Union
People who worked in factories lived together in small houses that were full to the brim and the idea was to go work while another sleeps, and then you sleep when others work.
Decibels measure intensity. If you whisper in an empty room it will measure between 0 and 1 db. This indicates the intensity of sound is minimal. This is considered the threshold of hearing.
A sound that measures 30 decibels is a 1000 times louder than the the threshold of hearing. An example of this is the noise of a regular computer produces between 20-40 dB.
