Remedial Uh2 IPA Kelas Xi

Gas dari aktivitas gunung merapi adalah contoh sumber polusi yang terjadi secara alami. Aktivitas gunung merapi seperti letusan vulkanik menghasilkan gas-gas beracun seperti sulfur dioksida, karbon dioksida, dan gas-gas lainnya. Ketika gas-gas ini dilepaskan ke atmosfer, mereka dapat mencemari udara dan menjadi sumber polusi udara alami.

The correct answer is desibel. Desibel is the unit used to measure the level of sound intensity or loudness. It is a logarithmic scale that compares the sound pressure level to a reference level. The higher the decibel value, the louder the sound. Other units like meter, kilogram, joule, and Celsius are not applicable for measuring sound intensity.

The correct answer is "polutan". The passage states that the substances contained in factory smoke and vehicle exhaust can cause pollution. "Polutan" is the Indonesian word for pollutant, which refers to substances that cause pollution.

The given correct answer is "efek rumah kaca". This refers to the phenomenon where certain gases in the atmosphere trap the heat from the sun, causing an increase in the Earth's temperature. This is a well-known concept in climate science and is considered one of the main factors contributing to global warming. The other options mentioned in the question, such as "penipisan lapisan ozon" (ozone layer depletion) and "pemanasan global" (global warming), are related to the overall issue of climate change, but specifically, the term "efek rumah kaca" refers to the specific process of heat trapping by greenhouse gases.

Materi partikulat yang berupa partikel cair disebut kabut. Kabut adalah fenomena ketika partikel-partikel air terdispersi dalam udara dan membentuk awan rendah yang dekat dengan permukaan bumi. Kabut biasanya terjadi saat kelembaban udara tinggi dan suhu udara rendah, sehingga partikel-partikel air dapat terkondensasi dan membentuk kabut.

Ozon adalah senyawa yang dapat berperan sebagai pelindung bumi dari sinar UV matahari karena terdapat di lapisan ozon di atmosfer, yang berfungsi untuk menyerap radiasi UV berbahaya sebelum mencapai permukaan bumi. Namun, ozon juga dapat menjadi polutan jika dihasilkan oleh aktivitas manusia, seperti emisi gas buang dari kendaraan bermotor dan industri.

Hujan asam terjadi sebagai dampak dari pencemaran yang disebabkan oleh sulfur dioksida dan nitrogen oksida. Ketika sulfur dioksida dan nitrogen oksida dilepaskan ke atmosfer oleh aktivitas manusia, seperti pembakaran bahan bakar fosil, industri, dan kendaraan bermotor, mereka bereaksi dengan uap air dan oksigen di udara untuk membentuk asam sulfat dan asam nitrat. Kemudian, asam ini jatuh ke tanah dalam bentuk hujan, salju, embun, atau kabut, yang dapat merusak lingkungan, tanaman, dan bangunan.

Suara mesin diesel memiliki tingkat kebisingan yang cukup tinggi, yaitu sekitar ±80 dB. Suara mesin diesel dapat menjadi penyebab kebisingan yang mengganggu karena suara yang dihasilkannya cukup keras dan berulang-ulang. Suara mesin diesel sering terdengar di area industri atau tempat-tempat yang menggunakan mesin diesel seperti kapal atau truk.

The correct answer is "lubang ozon". The use of CFC in various cooling products has been reduced because this gas can cause damage to the ozone layer.

The pollutants sulfur trioxide and ozone are considered secondary pollutants because they are not directly emitted into the atmosphere. Instead, they are formed through chemical reactions involving primary pollutants such as sulfur dioxide and nitrogen oxides. Therefore, the correct answer is 3 and 4.

Sulfur trioksida adalah polutan primer karena terbentuk langsung dari sumber polusi seperti pembakaran batubara dan minyak bumi. Karbon monoksida, karbon dioksida, sulfur dioksida, dan nitrogen dioksida juga termasuk polutan primer karena mereka juga terbentuk langsung dari sumber polusi seperti kendaraan bermotor dan industri.

The correct answer is nitrogen oksida, karbon dioksida, sulfur dioksida. Nitrogen oksida, karbon dioksida, dan sulfur dioksida adalah polutan dari lingkungan kerja industri yang dapat menyebabkan terjadinya pencemaran udara. Nitrogen oksida dihasilkan dari pembakaran bahan bakar fosil, karbon dioksida adalah gas rumah kaca yang dihasilkan dari aktivitas manusia seperti pembakaran bahan bakar fosil dan deforestasi, sedangkan sulfur dioksida dihasilkan dari pembakaran bahan bakar fosil yang mengandung belerang. Semua polutan ini dapat berkontribusi terhadap penurunan kualitas udara dan berdampak negatif pada kesehatan manusia dan lingkungan.

The given correct answer, "menulikan," is the most appropriate choice to describe the level of noise pollution caused by thunder, tractor engines, and textile machinery. "Menulikan" means "deafening" or "very loud" in Indonesian, which accurately reflects the high level of noise produced by these sources.

One of the physical indicators of air pollution is the presence of a strong odor. Air pollution can release various pollutants into the air, such as chemicals, smoke, or gases, which can produce unpleasant smells. These odors can indicate the presence of harmful substances in the air and can be a sign of poor air quality. Therefore, the option "bau" (odor) is a physical indicator of air pollution.

The given image can help us determine the level of air pollution based on chemical indicators. Chemical indicators are substances that change color or undergo a chemical reaction in the presence of certain pollutants. By using chemical indicators, we can analyze the composition of the air and identify the presence of harmful substances such as carbon monoxide, sulfur dioxide, or nitrogen oxides. This information can then be used to assess the quality of the air and take appropriate measures to reduce pollution.

Based on the student's observation, it can be inferred that the level of pollution they observed is low.

The correct answer is pemanasan global. Pemanasan global refers to the increase in the average temperature of the Earth's atmosphere and oceans over time. This phenomenon is primarily caused by the release of greenhouse gases, such as carbon dioxide, into the atmosphere from human activities like burning fossil fuels. These gases trap heat from the sun, leading to a rise in temperatures worldwide. The effects of pemanasan global include melting ice caps, rising sea levels, extreme weather events, and disruptions to ecosystems.

The correct answer states that pollution leads to a decrease in the quality of the environment and human beings. This is a valid explanation because pollution refers to the introduction of harmful substances or contaminants into the environment, which can have negative effects on both the natural surroundings and human health. The presence of pollutants in the air, water, or soil can lead to various environmental problems and health issues, causing a decline in the overall quality of the environment and human well-being.

The explanation for the given correct answer is that carbon monoxide (CO) has a higher affinity for hemoglobin in the blood compared to oxygen (O2). When carbon monoxide is inhaled, it binds strongly to hemoglobin, reducing the amount of oxygen that can bind to it. This leads to a decrease in the oxygen-carrying capacity of the blood, resulting in oxygen deprivation to the body's tissues and organs. This can lead to symptoms such as dizziness, loss of consciousness, and even death. Therefore, the statement "hemoglobin darah lebih banyak mengikat karbon monoksida dari pada oksigen" is correct.

The correct answer is "

The correct answer is "Smog". The term "asbut" is derived from the English word "smog", which refers to a type of air pollution that is a combination of smoke and fog. Smog is typically caused by the emission of pollutants from vehicles, industrial processes, and other sources, which react with sunlight to form harmful compounds. It is often characterized by a hazy appearance and can have negative effects on human health and the environment.

Karbondioksida yang terdapat di muka bumi terutama berasal dari respirasi dan pembakaran. Respirasi adalah proses di mana organisme menghasilkan energi dengan mengoksidasi makanan, menghasilkan karbondioksida sebagai produk sampingan. Pembakaran, di sisi lain, adalah proses oksidasi bahan bakar seperti kayu, batu bara, atau minyak, yang juga menghasilkan karbondioksida. Keduanya merupakan sumber utama karbondioksida di atmosfer bumi.