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Our sun is actually an orange, dwarf star. Although it is not nearly the ....hottest ....(hot) star known, its surface temperature is about 10,000'F and that of its interior is thought to be in the range of 20,000,000'F. We ......commonly ..... (common) think of the sun as burning, yet it's too hot to burn and is composed of elemental gases.
The sun is 865,000 miles in diameter and has a mass one-third of a million times ......greater ....(great) than the Earth's. Scientists believe that it's two billion years old and, instead of cooling, is still getting hotter. Perhaps, within the next two billion years, it will reach a temperature of sufficient intensity to destroy the Earth.
The sun's corona is almost as hot as interior. Solar prominences-tongues of hot gas-leap outward a half million miles from the sun's surface at speeds reaching 250,000 miles an hour. ........Fortunately... (fortune) , these prominences do not travel the full ninety three million miles to earth, nor are their terrific temperatures transmitted through space. Some of the energy from these ..disturbances ....... (urban) does not reach our atmosphere, however, and is believed to cause changes in weather.Our sun is actually an orange, dwarf star. Although it is not nearly the hottest star known, its surface temperature is about 10,000'F and that of its interior is thought to be in the range of 20,000,000'F. We commonly think of the sun as burning, yet it's too hot to burn and is composed of elemental gases.
The sun is 865,000 miles in diameter and has a mass one-third of a million times greater than the Earth's. Scientists believe that it's two billion years old and, instead of cooling, is still getting hotter. Perhaps, within the next two billion years, it will reach a temperature of sufficient intensity to destroy the Earth.
Our sun is actually an orange, dwarf star. Although it is not nearly the hottest star known, its surface temperature is about 10,000'F and that of its interior is thought to be in the range of 20,000,000'F. We commonly think of the sun as burning, yet it's too hot to burn and is composed of elemental gases.
The sun is 865,000 miles in diameter and has a mass one-third of a million times greater than the Earth's. Scientists believe that it's two billion years old and, instead of cooling, is still getting hotter. Perhaps, within the next two billion years, it will reach a temperature of sufficient intensity to destroy the Earth.
The sun's corona is almost as hot as interior. Solar prominences-tongues of hot gas-leap outward a half million miles from the sun's surface at speeds reaching 250,000 miles an hour. Fortunately, these prominences do not travel the full ninety three million miles to earth, nor are their terrific temperatures transmitted through space. Some of the energy from these disurbances does not reach our atmosphere, however, and is believed to cause changes in weather.Our sun is actually an orange, dwarf star. Although it is not nearly the hottest star known, its surface temperature is about 10,000'F and that of its interior is thought to be in the range of 20,000,000'F. We commonly think of the sun as burning, yet it's too hot to burn and is composed of elemental gases.
The sun is 865,000 miles in diameter and has a mass one-third of a million times greater than the Earth's. Scientists believe that it's two billion years old and, instead of cooling, is still getting hotter. Perhaps, within the next two billion years, it will reach a temperature of sufficient intensity to destroy the Earth
A geyser is the result of underground water under the combined conditions of high temperatures and increased pressure beneath the surface of the each. Since temperatue rises approximately one degree F for every sixty feet under the earth’s surface, and pressure increases with depth, water that seeps down in crachs and fissures until it reaches very hot rocks in the earth’s interior becomes heated to a temperatue in excess of 290 degrees F. Because of the gressure, it shoots out of the surface in the form of steam and hot water. The result is a geyser.For the most part, geysers are located in three regions of the world : New Zealand, Iceland, and the Yellowstone National Park area of the United States. The most famous geyser in the world is Old Faithful in Yellowstone Park. Old Faithful erupts almost every hour, rising to a height of 125 to 170 feet and expelling more then ten thousand gallons during each eruption1.
1. In order for a geyser to erupt,.................
.A. Hot rocks must rise to the sufface of the earth
B. water must flow underground
C. it must be a warm day
D. the earth must not be rugged or broken
2. Old Faithful is located in.....................
A. New Zeland
B. Iceland
C. the united States
D.England
3. Old Faithful erupts......................
A. every 10 minutes
B. every 60 minutes
C. every 125 minutes
D. every 170 minutes
4. A geyser is...................
A. hot water and steam
B. cracks and fissures
C. hot rocks
D. great pressure
5. As depth increases,......................
.A. pressure increases but temperature does not
B. temperature increases but pressure does not
C. both pressure and temperature increase
D. neither pressure nor temperature increases
A geyser is the result of underground water under the combined conditions of high temperatures and increased pressure beneath the surface of the each. Since temperatue rises approximately one degree F for every sixty feet under the earth’s surface, and pressure increases with depth, water that seeps down in crachs and fissures until it reaches very hot rocks in the earth’s interior becomes heated to a temperatue in excess of 290 degrees F. Because of the gressure, it shoots out of the surface in the form of steam and hot water. The result is a geyser.For the most part, geysers are located in three regions of the world : New Zealand, Iceland, and the Yellowstone National Park area of the United States. The most famous geyser in the world is Old Faithful in Yellowstone Park. Old Faithful erupts almost every hour, rising to a height of 125 to 170 feet and expelling more then ten thousand gallons during each eruption1.
1. In order for a geyser to erupt,.................
.A. Hot rocks must rise to the sufface of the earth
B. water must flow underground
C. it must be a warm day
D. the earth must not be rugged or broken
2. Old Faithful is located in.....................
A. New Zeland
B. Iceland
C. the united States
D.England
3. Old Faithful erupts......................
A. every 10 minutes
B. every 60 minutes
C. every 125 minutes
D. every 170 minutes
4. A geyser is...................
A. hot water and steam
B. cracks and fissures
C. hot rocks
D. great pressure
5. As depth increases,......................
.A. pressure increases but temperature does not
B. temperature increases but pressure does not
C. both pressure and temperature increase
D. neither pressure nor temperature increases
IV.Read the passage. Decide which of the following statements is True(T), Palse(F) or No information(NI)
We are all destroying the Earth. The seas and rivers are too dirty to swim in it. These is so much smoke in the air that it's unhealthy to live in many of world's cities. We've cut down so many trees that there are now areas of wasteland all over the world. Farmers in many parts of Africa can not got grow enough to eat and in some Asian countries there is too little rice. Wild animals are quickly disappearing because we have killed too many. However, it isn't enough simply to talk about the problem. We must act before it's too late to do anything about it. Join us now. Save the Earth. This is too important to ignore
1.__F___ We can swim in the seas and rivers because they are not polluted now.
2.___F__ We are planting a lot of trees in areas of wasteland.
3.__T___ There isn’t rice enough to eat in many parts of Africa.
4.___T__ We are killing too many wild animals.
5.__F___ It’s not important to save the Earth.
6.___F__ It's pleasant to live in a lot of cities in the world now
7.___T__There are areas of wasteland now because many trees are cut down
8.__F___Rice can grow enough in many parts of Africa
9.___T__Animals are not as many now as they were a few years ago
10.__T__It's time to act if we want to save the Earth
1.on
2.cover
3.the
4.in
5.moving
6.for
7.have
8.describle
9.is
10 .and
I fill in the blank of the following passage with one suitable word.Write your answer on your answer sheet
there is much more water than land..ON.......the surface of the earth .The sea and oceans.....COVER....nearly four-fifths of the whole world , and only one-fifths of the whole world and only one fifth of....THE....... land. If you traveled over the earth .....IN....different directions you would have to spend much more of your time.......MOVING.....on water than on roads or railways .We sometimes forget that......FOR....every mile of land there is four miles of water
there is much water on the surface of our earth that we ..HAVE.......to use two words to describe. We use the word seas to...DESCRIBE..... those parts of water surface which...IS........ only a few hundreds of milea wide the word oceans to describe the huge ares of water which are thousands of miles wide.....AND.....very deep
There’s much more water than land on the (1) _surface__ of the earth. The seas and oceans cover nearly (2) _four-fifths__ of the whole world, and only one-fifth of (3) _its__ land. If you traveled over the earth in different directions, you would have to spend (4) __much_ more of your time (5) _moving__ on water that on roads or railways. We sometimes forget that for every mile of land (6) _there are__ four miles of water.
There’s so much water in the surface of our earth that we (7) __have_ to use two words to describe. We use the word SEAS (8) _describes__ those parts of water surface which (9) _is__ only few hundreds of mile, the word OCEANS to describe the huge area of water (10) _which__ are thousands of miles wide and very deep.
1. A. cover B. surface C. outer D. outside
2. A. four-fives B. four-fifth C. four fifths D. fourth-fifths
3. A. it is B. it’s C. its D. them are
4. A. many B. much C. few D. too
5. A. to move B. move C. moved D. moving
6. A. there are B. there is C. there has D. have
7. A. must B. should C. have D. would
8. A. describing B. describes C. describe D. to describe
9. A. is B. are C. has D. will be
10. A. that’s B. which C. where D. whose
There’s much more water than land on the (1) ___ of the earth. The seas and oceans cover nearly (2) ___ of the whole world, and only one-fifth of (3) ___ land. If you traveled over the earth in different directions, you would have to spend (4) ___ more of your time (5) ___ on water that on roads or railways. We sometimes forget that for every mile of land (6) ___ four miles of water.
There’s so much water in the surface of our earth that we (7) ___ to use two words to describe. We use the word SEAS (8) ___ those parts of water surface which (9) ___ only few hundreds of mile, the word OCEANS to describe the huge area of water (10) ___ are thousands of miles wide and very deep.
1. A. cover B. surface C. outer D. outside
2. A. four-fives B. four-fifth C. four fifths D. fourth-fifths
3. A. it is B. it’s C. its D. them are
4. A. many B. much C. few D. too
5. A. to move B. move C. moved D. moving
6. A. there are B. there is C. there has D. have
7. A. must B. should C. have D. would
8. A. describing B. describes C. describe D. to describe
9. A. is B. are C. has D. will be
10. A. that’s B. which C. where D. whose