What is the text mainly about?

Pertanyaan

Read the following text to answer questions number 5 to 10.


   Acid rain is rain that is highly acidic because of sulfur oxides, nitrogen oxides, and other air pollutants dissolved in it. Normal rain is slightly acidic, with a pH of 6. Acid rain may have a pH value as low as 2.8.

    Acid rain can severely damage both plant and animal life. Certain lakes, for example, have lost all fish and plant life because of acid rain.

    Acid rain comes from sulfur in coal and oil. When they burn, they make sulfur dioxide (SO2 ). Most sulfur leaves factory chimneys as the gaseous sulfur dioxide (SO2 ) and most nitrogen are also emitted as one of the nitrogen oxides (NO or NO2 ), both of which are gasses. The gasses may be dry deposited–absorbed directly by the land, by lakes or by the surface vegetation. If they are in the atmosphere for anytime, the gasses will oxidize (gain an oxygen atom) and go into solution as acids. Sulphuric acid (H2 SO4 ) and the nitrogen oxides will become nitric acid (HNO3 ). The acids usually dissolve in cloud droplets and may travel great distances before being precipitated as acid rain.

  Catalysts such as hydrogen peroxide, ozone, and ammonium help promote the formation of acids in clouds. More ammonium (NH4 ) can be formed when some of the acids are partially neutralized by airborne ammonia (NH3 ). Acidification increases with the number of active hydrogen (H+) ions dissolved in acid. Hydrocarbons emitted by, for example, car exhausts will react in sunlight with nitrogen oxides to produce ozone. Although it is invaluable in the atmosphere, low-level ozone causes respiratory problems and also hastens the formation of acid rain. When acid rain falls on the ground it dissolves and liberates heavy metals and aluminum (Al). When it is washed into lakes, aluminum irritates the outer surfaces of many fish. As acid rain falls or drains into the lake the pH of the lake falls. Forests suffer the effect of acid rain through damage to leaves, through the loss of vital nutrients, and through the increased amounts of toxic metals liberated by acid, which damage roots and soil microorganisms.

 What is the text mainly about?

  1. The definition of acid rain.

  2. The process of acid rain.

  3. The effect of acid rain.

  4. Acid rain.

  5. Rain.

B. Syamsul

Master Teacher

Mahasiswa/Alumni Universitas PGRI Ronggolawe Tuban

Jawaban terverifikasi

Pembahasan

Teks di atas berbentuk Explanation Text yang bertujuan menjelaskan proses terbentuknya suatu proses dan memiliki tiga struktur yaitu:

1. General Statement (Pernyataan Umum):Berisi tentang informasi umum mengenai topik yang akan dibahas dalam teks.

2. Explanation: Berisi serangkaian kejadian-kejadian (sequence of events) dari suatu proses yang merupakan topik dari teks.

3. Closing: Bagian closing atau penutup bersifat pilihan atau tidak harus ada pada teks ini. Bagian ini dapat berisi informasi        tambahan atau opini penulis mengenai topik yang dibahas.

    Sementara itu, pertanyaan di atas menanyakan tentang topik dari Explanation Text di atas dan berdasarkan struktur di atas, untuk mencari topiknya, kita bisa melihat pada bagian General Statement (Pernyataan Umum) yang terletak pada paragraf pertama yang berbunyi "Acid rain is rain that is highly acidic because of sulfur oxides, nitrogen oxides, and other air pollutants dissolved in it". Arti dari kalimat itu sendiri adalah " Hujan asam adalah hujan yang mengandung zat asam yang tinggi karena sulfur dioksida, nitrogen oksida, dan zat pencemar udara yang lain terlarut di dalamnya". Dari sini, bisa kita ketahui bahwa topik dari Explanation Text di atas adalah hujan asam atau "acid rain".

Jadi, jawaban yang benar adalah D.

 

 

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