Beacon Online Quiz Season 4

In rural areas, biogas can be generated from organic waste materials such as animal manure or crop residues. This biogas can then be used for lighting and cooking purposes. The process involves the decomposition of organic matter in an anaerobic environment, which produces methane gas. This methane gas can be captured and stored in a biogas digester, and then used as a renewable energy source. Biogas is a sustainable and environmentally friendly option for rural communities, as it reduces reliance on traditional fossil fuels and helps to mitigate greenhouse gas emissions.

The correct answer is Steam engine. This can be inferred from the fact that the other three options (Kerosene engine, Diesel engine, and Petrol engine) are all types of internal combustion engines, whereas a steam engine is an external combustion engine that uses steam to generate power.

Hydroelectric power plants do not contribute to pollution because they generate electricity by harnessing the energy of flowing or falling water. Unlike thermal power plants, which burn fossil fuels and release harmful emissions, or nuclear power plants, which produce radioactive waste, hydroelectric power plants have a minimal environmental impact. They do not emit greenhouse gases or air pollutants, and they do not produce hazardous waste. Additionally, they have a long lifespan and can provide a reliable and renewable source of energy.

Rabindranath Tagore is the correct answer because he was the first Indian to receive the Nobel Prize in Literature in 1913. Tagore was a renowned poet, writer, and philosopher, known for his beautiful and lyrical works. His collection of poems, Gitanjali (Song Offerings), was the primary reason for his Nobel Prize win. Tagore's literary contributions not only brought recognition to Indian literature but also highlighted the rich cultural heritage of India on a global platform.

The depletion of Earth's ozone layer leads to an increased amount of ultraviolet (UV) radiation reaching the Earth's surface. UV radiation can have harmful effects on living organisms, including humans. It can cause skin cancer, cataracts, and weakened immune systems. Additionally, UV radiation can also damage ecosystems, including marine life and plant growth. Therefore, the increased amount of UV radiation reaching the Earth's surface is the harm caused by the depletion of the ozone layer.

The correct answer is 1770 because it is the only option provided that falls within a reasonable timeframe for the creation of something. The other options (1660, 1880, and 1550) are either too early or too late to be plausible answers.

The Philippines is the correct answer because it is the world's second-largest producer of geothermal energy. Geothermal energy is a renewable energy source that harnesses the heat from the Earth's core to generate electricity. The Philippines has a large number of geothermal power plants and has been actively investing in geothermal energy for several decades. This has allowed them to become a leading producer of geothermal energy globally, second only to the United States.

Incandescent bulbs are known for their inefficiency in converting electricity into light. Instead, a significant amount of the power consumed by these bulbs is converted into heat. The given answer of 80% suggests that 80% of the power consumed by incandescent bulbs is wasted in the form of heat. This aligns with the common knowledge that these bulbs are highly inefficient and produce a substantial amount of heat compared to the light they emit.

Hydrogen is the substance commonly used as a fuel in a fuel cell. Fuel cells are devices that convert chemical energy directly into mechanical energy. Hydrogen is an ideal fuel for fuel cells because it is abundant, can be produced from renewable sources, and produces only water as a byproduct when it reacts with oxygen in the fuel cell. This makes hydrogen a clean and efficient fuel option for generating mechanical energy in fuel cells.

The earth pin in a three-pin plug is made longer and thicker to ensure that it makes contact with the socket before the other two pins. This is important for safety reasons, as the earth connection is designed to provide a path for electrical current to flow into the ground in the event of a fault. By being the first to connect and last to disconnect, the earth pin helps to protect against electric shocks and prevent damage to electrical equipment.

Dot matrix is considered to be the first computer printer because it was the first type of printer that was widely available for personal computers. It used a matrix of small pins to strike an inked ribbon and create characters on paper. This type of printer was popular in the 1980s and early 1990s before being replaced by inkjet and laser printers.

Slash and burn is not an important characteristic of the Green revolution because it refers to a traditional method of farming where vegetation is cut down and burned to clear land for cultivation. The Green revolution, on the other hand, focused on mechanized agriculture, hybrid seeds, and monoculture to increase agricultural productivity and efficiency. Slash and burn is not aligned with the modern techniques and goals of the Green revolution, making it the correct answer.

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The burning of fossil fuels releases greenhouse gases such as carbon dioxide, which contributes to the formation of smog, acid precipitation, and the increased production of greenhouse gases. However, it does not directly contribute to the loss of the ozone layer. The depletion of the ozone layer is primarily caused by the release of certain chemicals called ozone-depleting substances, such as chlorofluorocarbons (CFCs), which are used in aerosol propellants and refrigerants.

Australia has the highest per capita carbon emissions among the given countries. This means that on average, each person in Australia emits more carbon dioxide into the atmosphere compared to individuals in China, Russia, or India. This could be due to various factors such as Australia's heavy reliance on coal for energy production, its large mining industry, and its relatively high standard of living.