Seismometers are tools which measure motion in the ground including seismic waves generated by earthquakes, volcanoes, and other activities which might create seismic waves. Seismometers measure any movement of seismic activity in the earth and today this is done by electronic means whereby the machine measures any changes in seismic activity in the surrounding areas of the seismometer. The first seismometer is believed to have been invented by Zhang Heng of China's Han Dynasty in 132 AD.
Answer:
The waves travel across the ocean out of the area where the wind is blowing. Wave approaches the shore it touches bottom, and the base is slowed down, the water at the top of the wave moves faster, and causes the wave to break.
Explanation:
- The first three Chinese dynasties, the Xia, Shang and Zhou, are often referred as the '3 holy dynasties'.
- Qin Shi Huang, ruler of the Qin Dynasty became the first emperor of a unified China.
-The first dynasty established in China was the Xia Dynasty. Most of what is known about this early dynasty comes from legends.
The ozone is an important feature which blocks out the radiation
