Ulangan Harian IPA Xi

The correct answer is "Berinterkasi saling membutuhkan dengan tumbuhan dan hewan". This answer is supported by the statement "Manusia adalah bagian dari lingkungan hidup" which implies that humans are part of the environment. The statement also suggests that creating a good environment requires interaction and mutual dependence with plants and animals. Therefore, it can be inferred that humans need to interact and depend on plants and animals for a good environment.

The given answer states that a substance is not considered a pollutant if it does not cause any health problems. This means that all the other conditions mentioned in the question (being in the wrong place, excessive amount, wrong time, and disrupting environmental balance) are criteria for something to be classified as a pollutant.

The accumulation of garbage due to high population density in an area can lead to the occurrence of diarrhea.

The correct answer is "Pembakaran bahan bakar yang menghasilkan CO2" because it is stated in the question that one of the factors causing the increase in air temperature is the burning of fuel that produces CO2.

The passage mentions that uncontrolled and heavy motor vehicle traffic in urban areas can have negative effects on the environment. It specifically mentions that the smoke emitted from these vehicles can blacken tree trunks. Additionally, it states that domestic waste such as plastic, glass, and cans can cause pollution. Therefore, the correct answer is "Udara dan tanah" (Air and soil), as the passage suggests that both air and soil can be affected by the mentioned pollution sources.

The correct answer is "Meningkatkan kadar O2 di udara" (Increasing the level of O2 in the air). The creation of city parks essentially aims to increase the level of oxygen in the air. Trees and plants in parks produce oxygen through photosynthesis, which helps to improve air quality and combat air pollution.

The increase in carbon dioxide (CO2) in the air leads to the occurrence of the greenhouse effect. This happens because CO2 is a greenhouse gas that traps heat in the atmosphere, preventing it from escaping into space. As a result, the temperature of the Earth's surface and lower atmosphere increases, causing global warming and climate change. The greenhouse effect is a significant environmental issue that has various impacts on ecosystems, weather patterns, and human activities.

Eutrofikasi adalah proses peningkatan konsentrasi nutrien seperti nitrogen dan fosfor di dalam air atau tanah yang dapat menyebabkan pertumbuhan alga yang berlebihan. Pada kondisi air atau tanah yang tercemar oleh polusi udara, nutrien seperti nitrogen dan fosfor dapat terbawa oleh hujan asam atau partikel polutan dan masuk ke dalam ekosistem. Peningkatan nutrien ini dapat memicu pertumbuhan alga yang berlebihan, mengganggu pertumbuhan tanaman dan meningkatkan risiko serangan penyakit pada tanaman.

The correct answer is "Naiknya suhu atmosfer karena pencemaran air oleh CO2, NO2, dan SO2." This is because the greenhouse effect refers to the trapping of heat in the Earth's atmosphere due to the presence of greenhouse gases such as carbon dioxide (CO2), nitrogen dioxide (NO2), and sulfur dioxide (SO2). These gases absorb and re-emit infrared radiation, causing an increase in atmospheric temperature.

The correct answer is "Airnya jernih dan tidak berwarna" because clear and colorless water is an indication that it is not polluted. If the water is contaminated, it may appear murky or have a strange color.