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Choose the suitable word for the blank by clicking the correct answer.

1. (this is an easy one) A _____ is an equipment used to record the strength, duration and distance away of earthquakes.

   • monograph

   • retinoscope

   • telegraph

   • seismograph

   • stethoscope

2. _____ quakes are one of the general class of earthquakes which pose particular problems for scientists trying to develop ways to predict them.

   • Tectonic

   • Organic

   • Nitric

   • Artifcially produced

   • Volcanic

3. One of the clues that led to the prediction of this earthquake stated above was a chain of low-magnitude tremors, called _____.

   • preshock
   • forequake
   • foreshock
   • prequake
   • forecrash

4. There will be a great disturbance under an ocean as an strong earthquake occurs or a volcano erupts. As a result, a _____ is formed.

   • tsunami

   • tsarima

   • tsumani

   • tsorima

   • tsurima

5. A Chinese astronomer called _____ invented the oldest seismoscope.

   • Cheng Wo

   • Chang Wo

   • Zhang Hong

   • Chang Heng

   • Tsang Wo

6. Seismologists have found that major earthquakes are often preceded by certain measurable physical changes in the environment around the _____.

   • epicure

   • sun

   • lava

   • epicentre

   • larva

   　

7. _____, a scale that measures the energy released at the focus of a quake.

   • Richard Scale

   • River Scale

   • Richter Scale

   • Richer Scale

   • Rither Scale

8. The unit that is used to measure the greatness of an earthquake is called _____.

   • altitude

   • attitude

   • latitude

   • longitude

   • magnitude

   　

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last updated: 17/08/99。