高一英語Earthquakes教案
but all hope was not lost. the army sent 150,000 soldiers to help them. workers built shelters for survivors. slowly, the city began to breathe again.
section 2: background information on earthquakes
i. zhang heng
zhang heng (張衡) (78ad—139ad) was an astronomer, mathematician, artist and literary scholar（文學學者）in the eastern han dynasty of china.
born in today’s nangyang county, henan, he was a good writer at age 12. at the age of 16, he left home to pursue(從事) his studying the capital city. he spent at least 10 years of his youth in literary studies and writing. he published several well-recognized literary writings. he switched to(轉向) astronomy after age 30.
in the year 123 he corrected the calendar to bring it into line with the seasons.
in 132 zhang heng invented the first seismograph(地震儀) for measuring earthquakes. his device was in the shape of a cylinder(圓柱體) with eight dragon heads around the top, each with a ball in its mouth. around the bottom were eight frogs, each directly under a dragon head. when an earthquake occurred, a ball fell out of the dragon’s mouth into a frog’s mouth, making a noise. he also invented the odometer(里程表)
zhang heng was the first person in china to construct a rotating celestial globe.
in one of his publications he also proposed π= 730/232 (or about 3.1466) .
ii. earthquake survival tips
would you know what to do during a really big earthquake? experts have looked into matter carefully. it may be worth you while to look over the following tips they have for us.
if the ground begins shaking while you are driving, pull over and stay in your car. if you are in a building, try to get near a strong wall. the corner of the room or the space under a big doorway is the safest. as soon as the quake is over, check the gas pipe in the building. gas fires often result from earthquakes. these tips may prove to be lifesavers. we should, therefore, keep them in mind. remember to always hope for the best but prepare for the worst.
escape in the school
if it has an earthquake when having classes, the students should listen to the teacher’s instruction, protect their heads and hide under the desks.
if it has an earthquake when the students are in the sports ground, they can crouch on the spot and protect their heads with hands. be sure to keep away with high building and dangerous objects.
don’t go back to the classroom.
retreat in order after the earthquake.