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Grade 8 - Unit 7 - Getting started
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8. The sight of too many telephone poles, advertising billboards, overhead power lines, or shop signs may case ……………………
visual pollution
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4. Too much use of electric lights in cities may cause …………..
light pollution
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1. When ……………............. happens, the water temperature in streams, rivers, lakes, or oceans changes.
thermal pollution
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2. ……………………. occurs when the atmosphere contains gases, dust, or fumes in harmful amounts.
air pollution
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3. When radiation goes into the land, air or water, it is called ………………………
radioactive pollution
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6. ………………………… happens when human activities destroy the Earth’s surface.
Land / Soil pollution
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5.………………….. is the contamination of lakes, rivers, oceans, or groundwater, usually by human activities.
Water pollution
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7. …………..…… occurs because there are too many loud sounds in the environment.
Noise pollution
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