Red Alert: Volcanoes

Volcanoes can be fun to learn about. It can be neat to watch them erupt. But if you live near a volcano, you know that they are dangerous! An eruption can like an explosion. Rock and lava can throw up into the air. Streams of red hot lava quickly run down from the peak of the volcano. The air is filled with deadly gases. These things can put many lives in danger. Scientists have learned that there are many things that they can study to help them tell when an eruption might happen. They can study the movements of the ground. When a volcano is about to erupt, the ground will often move just like it does during an earthquake. Scientists can also measure the gases that come out of a volcano. Most volcanoes emit gases all of the time. More gases are let out as the volcano gets closer to erupting. They can also study the way the land and water around the volcano. Scientists can read these signs and warn people of danger. They may not realize it, but their work helps to keep people safe!

1. Read the passage and choose the best answer A, B,Cor D toeach question below. 1. In the passage, a volcanic eruption is compared as .

A.an explosion

B.an exploration

C.a bomb

D.a danger

2. can come out from a volcanic eruption.

A. Rock

B.Lava

C.Gases

D.All above

3. can study many things to predict when an eruption might happen.

A.Economists

B.Scientists

C.People

D.Biologists

4. There are ways for studying to estimate the time an eruption might happen.

A. 1

B. 2

C. 3

D. 4

5. When an eruption is going to happen, .

A.the ground moves as it does during an earthquake.

B.the gases don't come out of it more than usual.

C.only the water around it changes.

D.the ground moves slowly and weakly.

 Choose the word or phrase that best fits the blank space in the following passage:

        A volcano is an opening in the earth’s surface through (1)___________ lava, hot, gases and rock fragments erupt. (2) ________ an opening occurs when melted rock from deep within the earth blasts through the surface. Most volcanoes are a top mountains, particularly cone-shaped mountains. The mountains themselves are also called volcanoes.

        Eruptions of volcanic mountains are spectacular sights. In some eruptions, huge fiery clouds rise over the mountain, and growing rivers of lava flow down (3) _________ sides. In other eruptions, red- hot ash and cinders shoot out the mountaintop, and large chunks of hot rockare blasted (4) ________ into the air. A few eruptions are so ( 5) _________ that they blow the mountain apart.

     Some eruptions occur on volcanic islands. Such islands are the tops of volcanic mountains that have been built (6) __________ from the ocean floor by repeated eruptions. Other

eruptions occur along narrow cracks in the ocean floor.

     1/ A. which             B. that                   C. where                     D. when

     2/ A. So                   B. Such                 C. That                       D. Many

     3/ A. its                   B. it                       C. their                       D. theirs

     4/ A. high               B. low                    C. below                     D. above

     5/ A. gentle             B. violent              C. terrible                   D. awful

     6/ A. up                  B. on                      C. into                        D. onto

: Some volcanoes are always ( 1 ) . . . . . . . . . . . . . . . . They are called active volcanoes . Mount Etna in Italy is an active ( 2 ) Sorine volcanoes have not erupted since prehistoric times . These are ( 3 ) . . . . . . extinct volcanoes . Most of the Hawaiian Islands are extinct volcanoes . These volcanoes ( 4 ) . . . . . . . . . . . . . . have a hot spot under them . They ( 5 ) . . . . . . . . . . . . . . . erupt anymore . .
Some volcanoes have not erupted for a long time , ( 6 ) . . . . . . . . . . . they could erupt again . These are called dormant volcanoes . Scientists try to figure out ( 7 ) . . . . . . . . . . . . volcanoes will erupt . Studying volcanoes is hard and dangerous work . Scientists drill into volcanoes . They ( 8 ) . maps of the inside of the volcanoes . They use satellites to study volcanoes ( 9 ) . . . . . … . . . . . space . Scientists have been able to predict . a few eruptions . But it is not ( 10 ) . . … . . . to tell what a volcano might do .
1 . A . erupting B . running C . going. D . firing
2 . A . mountain B . volcano C river D . hill
3 . A . named B . thought C . called D . said
4 . A . any longer B . any more C . not more D. No longer
5 . A . won ' t B . cannot C . should not D . may not
6 . A . and B . or C . but D. so
7 , A . where B . why C . that D. when
8 . A . do B . create C . build D. make
9 . A . in B . from C.into D. out of
10 . A . easy B . difficult C . able D. good

Complete the facts. Write ONE word in each gap.

1.   Volcanoes can be under the earth or under the __________.

2.   __________ volcanoes can erupt again.

3.   When a volcano erupts, you can see __________ from far away.

4.   When a volcano erupts, __________ can destroy whole towns.

5.   The last time Mount __________ erupted was in 1944.

6.   Surtsey is an __________ that was formed by a submarine volcano.

7.   If a supervolcano erupted, our __________ would change.

8.   __________ volcanoes are the only ones that are not dangerous.

nữa nek

Part 4: Read the passage and choose a word from the box. Write the correct word next to the number. There is one example.

My life (0) __changed__ after I had my first smartphone.

rises ash liquid

hole underground across

There are volcanoes all over the earth. They can be on land, (1) ___________, or under the sea. They can be dormant, which means they may erupt again, or they can be extinct, which means they will not erupt again. There are different types of volcanoes and some are more dangerous than others. Volcanoes become dangerous when they erupt.

Volcanoes erupt when red-hot rock, called magma, (2) ___________ from inside in the earth and comes out of a (3) ___________ in the ground. Some of it flies into the air, along with black (4) ___________. You can see this from many kilometers away. When the rock comes out of the hole, it is called lava, and it is so hot it is (5) ___________. It can move (6) ___________ the land. Lava can destroy trees, roads and homes.

lightning / Eruption  /volcano/ landslide/ avalanche/ /flood/ Sandstorm/ drought /earthquake/ typhoon/

1.I saw on TV that yesterday there was an …………………. on an island in the Pacific and hot lava came down the volcano.

 2. My little sister is afraid of ……………….……., so when there is a bad storm she always hides

3. Last Sunday we wanted to go skiing, but we couldn’t because in the mountains there was an......

 4. All people in the village rushed into the public shelteres as soon as the ………….………. erupted

5. Several people were going along when suddenly there was a ……………………. crashing down the hillside and blocked the road in front of them.

6. Tankers full of water were sent, but it was too late to save many of the animals and crops there. The …………………….….made the whole area lik

7. When the …………….. happened last year, the river overflowed in several places and huge areas of farming were several meters under water. Boats were being used to rescue people in nearby villagese a vast desert.