Kuis Pencemaran Udara Kelas VII Semester Genap

Reboisasi adalah penanaman kembali lahan-lahan yang gundul. Dalam konteks ini, reboisasi adalah proses mengembalikan vegetasi dan pohon-pohon di lahan yang sebelumnya telah kehilangan tutupan vegetasi.

Asap kendaraan adalah zat yang menyebabkan pencemaran udara. Kendaraan bermotor menghasilkan emisi gas buang yang mengandung berbagai zat berbahaya seperti karbon monoksida, nitrogen dioksida, dan partikel-partikel halus. Emisi ini dapat mencemari udara dan menyebabkan berbagai masalah kesehatan seperti iritasi mata dan saluran pernapasan, serta meningkatkan risiko penyakit pernapasan dan kardiovaskular. Oleh karena itu, asap kendaraan merupakan salah satu penyumbang utama pencemaran udara.

Membakar sampah yang sudah menumpuk dapat mencemari lingkungan karena proses pembakaran akan menghasilkan emisi gas beracun dan polutan udara. Sampah yang dibakar juga dapat menghasilkan asap yang mengandung zat-zat berbahaya dan dapat mencemari udara, tanah, dan air. Selain itu, pembakaran sampah juga dapat menyebabkan kerusakan pada lapisan ozon dan menyumbang pada perubahan iklim global. Oleh karena itu, membakar sampah yang sudah menumpuk tidaklah ramah lingkungan dan dapat mencemari lingkungan.

The polwan in the story fainted because she had been working at the busy traffic intersection for five consecutive days without using a nose mask. The intersection is heavily congested with motor vehicles, including motorcycles, buses, and trucks, as well as a nearby operating factory. This leads to poor air quality, and Agus even covers his nose when passing through the intersection. Therefore, it can be inferred that the polwan fainted due to a lack of oxygen in the polluted air she was exposed to during her duty.

The correct answer suggests that the policewoman should cover her nose with a nose mask to prevent herself from fainting while regulating traffic at a red light intersection. This implies that there might be unpleasant smells or pollutants in the air that could affect her health. By covering her nose with a mask, she can filter the air and reduce the risk of fainting.

The correct answer is "mengurangi karbondioksida" which means "reduce carbon dioxide" in English. Reboisasi, or reforestation, refers to the process of planting trees in areas where they have been cut down or destroyed. Trees play a crucial role in reducing carbon dioxide levels in the atmosphere through the process of photosynthesis. They absorb carbon dioxide and release oxygen, helping to mitigate the effects of air pollution and climate change. Therefore, reforestation programs aim to increase the number of trees and ultimately reduce carbon dioxide levels in the environment.

The correct answer is "keberadaannya di tempat yang tidak tepat". This answer suggests that a substance is considered a pollutant when it is present in a location where it is not supposed to be. This implies that the substance can have negative effects on the environment or living organisms in that particular location.

The main cause of global warming is carbon dioxide. Carbon dioxide is a greenhouse gas that is released into the atmosphere through human activities such as burning fossil fuels, deforestation, and industrial processes. When carbon dioxide is released into the atmosphere, it traps heat from the sun and prevents it from escaping back into space, leading to an increase in the Earth's temperature. This phenomenon, known as the greenhouse effect, is the primary driver of global warming.

CFC (chlorofluorocarbon) is the correct answer because it is a type of pollutant that contributes to the destruction of the ozone layer in the atmosphere. CFCs are synthetic compounds commonly used in aerosol propellants, refrigerants, and foam-blowing agents. When released into the atmosphere, CFCs can rise to the stratosphere and break down ozone molecules, leading to the thinning of the ozone layer. This thinning allows more harmful ultraviolet (UV) radiation from the sun to reach the Earth's surface, which can have detrimental effects on human health and the environment.

Melonggarkan pakaian adalah pertolongan pertama yang dapat kita berikan untuk menolong polwan agar cepat siuman. Ketika seseorang kehilangan kesadaran atau pingsan, melonggarkan pakaian yang ketat atau mengganggu pernapasan dapat membantu memastikan aliran udara yang cukup ke tubuh dan membantu pemulihan kesadaran. Dengan melonggarkan pakaian, kita dapat mengurangi tekanan pada tubuh dan memfasilitasi proses pernapasan yang lebih baik.

Hujan asam dapat terjadi sebagai akibat pembuangan limbah asap dari pabrik maupun kendaraan yang mengandung sulfur oksida. Sulfur oksida merupakan salah satu gas yang dihasilkan oleh pembakaran bahan bakar fosil yang mengandung sulfur, seperti batu bara dan minyak bumi. Ketika sulfur oksida teroksidasi dan bereaksi dengan air di atmosfer, akan membentuk asam sulfat yang kemudian jatuh ke bumi sebagai hujan asam. Hujan asam memiliki dampak negatif terhadap lingkungan, termasuk kerusakan pada tanaman, air, dan bangunan.

The correct answer is "uji emisi" (emission testing). Emission testing is a measure taken to address air pollution by assessing the amount of pollutants released into the air by vehicles, industries, or other sources. This testing helps to identify the sources of pollution and ensure that they comply with emission standards and regulations. By conducting emission tests, authorities can enforce measures to reduce pollution and improve air quality.

One of the ways to prevent air pollution is by stopping the production of goods that can damage the ozone layer. This is because certain products, such as those containing chlorofluorocarbons (CFCs), can contribute to the depletion of the ozone layer, which in turn leads to increased levels of harmful ultraviolet radiation reaching the Earth's surface. By halting the production of such goods, we can reduce the release of these harmful substances into the atmosphere and minimize the damage to the ozone layer, ultimately helping to prevent air pollution.