Which of the following is a renewable source of energy?
Sunlight
Identifying Renewable Energy Sources
Understanding different types of energy sources is crucial for environmental studies and general science. Energy sources are broadly classified into two categories: renewable and non-renewable.
What is Renewable Energy?
Renewable energy comes from sources that are naturally replenished on a human timescale. These sources include sunlight, wind, rain, tides, waves, and geothermal heat. They are considered sustainable because they will not run out.
What is Non-Renewable Energy?
Non-renewable energy comes from sources that are finite and will eventually be depleted. These include fossil fuels like coal, petroleum, and natural gas, as well as nuclear energy derived from uranium.
Analyzing the Options
Let's examine each option provided in the question:
- Petroleum: Petroleum is a fossil fuel formed over millions of years from organic matter. It is a finite resource and is consumed much faster than it is naturally formed. Therefore, petroleum is a non-renewable source of energy.
- Coal: Coal is also a fossil fuel, primarily composed of carbonized plant matter. Like petroleum, it takes millions of years to form and is being consumed at a rate far exceeding its formation. Thus, coal is a non-renewable source of energy.
- Sunlight: Sunlight is energy emitted by the sun in the form of solar radiation. The sun is expected to continue emitting energy for billions of years, making solar energy, derived from sunlight, a virtually inexhaustible resource on a human timescale. Therefore, sunlight is a renewable source of energy.
- Fossil fuels: This option is a general term that includes coal, petroleum, and natural gas. As discussed, all fossil fuels are finite resources and are classified as non-renewable sources of energy.
Conclusion: Identifying the Renewable Source
Based on the analysis, sunlight is the only option among those listed that is a naturally replenished resource and considered a renewable source of energy.
Revision Table: Renewable vs. Non-Renewable Energy
| Energy Type | Characteristics | Examples | Availability |
|---|---|---|---|
| Renewable Energy | Naturally replenished on a human timescale | Sunlight, Wind, Hydropower, Geothermal, Biomass | Sustainable, generally inexhaustible |
| Non-Renewable Energy | Finite resources, takes millions of years to form | Coal, Petroleum, Natural Gas, Nuclear (from Uranium) | Depletable, will eventually run out |
Additional Information on Renewable Energy Sources
Exploring other renewable energy sources can provide a broader understanding:
- Wind Energy: Captured using wind turbines, harnesses the kinetic energy of moving air.
- Hydropower: Generated from the energy of moving water, typically from rivers or dams.
- Geothermal Energy: Uses the heat from within the Earth's core.
- Biomass Energy: Derived from organic materials such as plants, crops, and waste.
These renewable sources play a vital role in reducing reliance on fossil fuels and mitigating climate change by producing fewer greenhouse gas emissions.
Important Questions from Renewable
Given below are two statements:
Statement I: Passive solar systems pump a heat absorbing medium rather than storing heat in stationary medium.
Statement II: Solar energy can produce high temperatures even in the range of 1000°C or more.
In the light of the above statements, choose the most appropriate answer from the options given below:
Which of the following materials is used as a moderator in nuclear power reactors?
In a nuclear fusion reactor based on deuterium + tritium fuel, the proportion of these isotopes of hydrogen in the fuel is as
The power output (P) from an ideal magnetohydrodynamic power generating plant varies with the strength of magnetic field (B) as.
Which of the following is a disadvantage of most of the renewable energy sources?
