More ammonium (NH₄) can be formed when some of the acids are partially neutralized by airborne ammonia (NH₃). Catalysts such as hydrogen peroxide, ozone, and ammonium help promote the formation of acid in clouds. The acids usually dissolve in cloud droplets and may travel great distances before being precipitated as acid rain. Sulfuric acid (H₂SO₄) and the nitrogen oxides will become nitric acid (HNO₃). If they are in the atmosphere for anytime, the glasses will oxidize (gain an oxygen atom) and go into solution as acids. The gasses may be dry deposited-absorbed directly by the land, by lakes or by the surface vegetation. Most sulfur leaves factory chimneys as the gaseous sulfur dioxide (SO₂) and most nitrogen oxides (NO ᴏr NO₂), both of which are gasses. When they burn, they make sulfur dioxide (SO₂). Certain lakes, for example, have lost all fish and plant life because of acid rain.Īcid rain comes from sulfur in coal and oil.
Acid rain may have a pH value as low as 2.8.Īcid rain can severely damage both plant and animal life. Normal rain is slightly acidic, with a pH of 6. The underlined word above has the same meaning with….Īcid rain is rain that is highly acidic because of sulfur oxides, nitrogen oxides, and other air pollutants dissolved in it. “Here, the food is mixed with the juices secreted by the cells”. “Human body is made up of countless millions of cells.” (Paragraph 1)ĥ. the better we digest the food we eat, the healthier we will be.Ĥ. everybody must conduct the processes of digestive system well.Į. the digestive system is needed if we are eating the food instantly.ĭ. no one concerned with the process of digestive system for their health.Ĭ. a good process of digestive system will help our body becoming healthier.ī. The food we take must be changed into substances carried in the blood to the placesĪ. The food is mixed with the juice secreted by the cells in the stomachĮ. The food is directly swallowed through esophagus into the stomachĭ. The food must be digested first through the processĬ. The food changes into acids absorbed by the willī. There are soon absorbed by the villi (microscopic branch projections from the intestine walls) walls and passed into the bloodstream.Ī. In a few hours, the food changes into acids. All the time the muscular walls of the intestine are squeezing, mixed and moving the food onwards. Then the food enters the small intestine.
Here, the food is mixed with the juices secreted by the cells in the stomach for several hours. Saliva contains digestive juice which moisten the food, so it can be swallowed easily.įrom the mouth, food passes through the esophagus (the food passage) into the stomach. The food we eat is broken up into small pieces by the action of teeth, mixed with saliva, a juice secreted by glands in the mouth. The first digestive process takes places in the mouth. However, the food that we take must be changed into substance that can be carried in the blood to the places where they are needed, this process is called digestion. Food is needed to build up new cells and replace the worn out cells. Human body is made up of countless millions of cells. Answer the questions by crossing (x) a, b, c, d, or e in front of the right answer! Inggris kelas xi semester genap kurtilas dilengkapi kunci jawaban.Ī. Ada sekitar 35 butir soal (20 PG + 15 essay) ulangan akhir semester genap atau penilaian akhir tahun yang bisa Anda pelajari secara online, sebelum menghadapi ujian kenaikan kelas yang sebenarnya.īerikut dibawah ini soal UAS B.
Inggris kurikulum 2013 SMA/MA/SMK/MAK/Sederajat edisi revisi, mulai dari Bab 1, yang berisikan soal tentang informal letter serta expression related to the informal letter sampai dengan Bab 4, Explanation text dan passive voice. Contoh Soal UAS/PAT Bahasa Inggris Kelas XI Semester 2 K13 Beserta Jawaban berisikan soal-soal b.
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