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1. The passage says that about five hundred volcanoes_____.
A. will erupt this year B. are still active C. are located under water D. have been discovered
2. Most of the active volcanoes are located in_____.
A. the Pacific Ocean B. South America C. the Atlan Ocean D. the western United States
3. Which of the following is NOT true?
A. Volcanoes are found in belts or chains. B. The earth’s crust is weak along mountain ranges. C. Hot rock escapes during volcano eruption. D. Volcanoes can be found in the ocean basins.
4. The Hawaiian Islands were built by volcanoes that_____.
A. began erupting under water B. formed a mountain range under water
C. finally reached the surface of the ocean D. both A and C
5. The best title for this selection may be_____.
A. How the Hawaiian Islands Were Built B. At the Bottom of the Ocean
C. The Earth’s Volcanoes D. Why Volcanoes Erupt
1. By the 1930s, more than 282 million acres of farmland _______ in America by erosion.
A. damaged B. was damaged C. were damaged D. damages
2. The community house _______ after massive destruction of the earthquake now.
A. was rebuilt B. is being rebuilt C. has rebuilt D. is rebuilt
3. People living around the volcano ______ for one hour.
A. has evacuated B. have evacuated
C. have been evacuated D. has been evacuated
4. The air ________ if people build more factories here.
A. polluted B. will polluted C. will be polluted D. pollute
5. More trees ____ every year to protect the environmental.
A. are planted B. planted C. were planted D. will be planted
Read and put the headings into the correct paragraphs.
(There is one extra)
1. Effect on health of humans
2. Effect on growth of plants
3. Decreased soil fertility
4. Toxic dust
5. Changes in temperature
6. Changes in soil structure
Effects of Soil Pollution
1. : Considering how soil is the reason we are
able to sustain ourselves, the contamination of it has major consequences on our
health. Crops and plants grown on polluted soil absorb much of the pollution and
then pass these on to us. This could explain the sudden surge in small and terminal
illnesses.
Effect on health of humans
2. : The ecological balance of any system gets
affected due to the widespread contamination of the soil. Most plants are unable to
adapt when the chemistry of the soil changes so radically in a short period of time.
Fungi and bacteria found in the soil that bind it together begin to decline, which
creates an additional problem of soil erosion.
Effect on growth of plants
3. : The toxic chemicals present in the soil can
decrease soil fertility and therefore decrease in the soil yield. The contaminated soil
is then used to produce fruits and vegetables which lacks quality nutrients and may
contain some poisonous substance to cause serious health problems in people
consuming them.
Decreased soil fertility
4. : The emission of toxic and foul gases from
landfills pollutes the environment and causes serious effects on health of some
people. The unpleasant smell causes inconvenience to other people.
Toxic Dust
5. : The death of many soil organisms (e.g.
earthworms) in the soil can lead to alteration in soil structure. Apart from that, it
could also force other predators to move to other places in search of food.