Question

The original source of energy that powers both wind energy and hydropower is... A. Precipitation B. Rotation of the Earth C. The sun D. Gravity E. Radioactive decav within the Earth's mantle

Short answer

C. The sun

Step-by-step solution

Understand Wind Energy

Wind energy is created when the sun's heat causes temperature differences in the atmosphere. This uneven heating causes air movement, creating wind.

Understand Hydropower

Hydropower is generated by the water cycle. The sun heats water in rivers and lakes, causing evaporation. This water vapor forms clouds and precipitates back to Earth as rain, filling rivers and lakes again, which can be used to turn turbines.

Identify the Source

Both wind energy and hydropower ultimately depend on the sun. The sun’s energy drives the processes that create wind and water cycles.

Verify the Answer

The correct answer must be the origin of both energy sources. Hence, the correct answer to the question is 'C. The sun'.

Key concepts

wind energy education

Wind energy is a vital renewable resource that we can harness to generate electricity. It all begins with the sun's heat, which causes uneven heating of the Earth's surface.
This temperature difference creates various pressure zones in the atmosphere. When air moves from high-pressure areas to low-pressure areas, wind is formed.
This moving air can then be captured by wind turbines to produce electricity.
Wind energy is clean and doesn't produce harmful emissions, making it a great alternative to fossil fuels.

hydropower basics

Hydropower is another key renewable energy source. It relies on the water cycle, which is driven by the sun’s energy.
When the sun heats up water in rivers, lakes, and oceans, it evaporates and forms clouds. These clouds can travel long distances before releasing their water as precipitation.
This precipitation fills rivers and reservoirs, creating a continuous flow of water.
Hydropower plants use this moving water to turn turbines, generating electricity.
This process is sustainable and helps reduce our reliance on non-renewable energy sources.

solar energy impact

Solar energy has a profound impact on our environment and energy systems.
By harnessing the sun's rays, we can generate electricity using photovoltaic (PV) panels or solar thermal systems.
Solar energy is abundant and available almost everywhere, reducing the need for fossil fuels.
As a result, it helps decrease greenhouse gas emissions and mitigates climate change.
Additionally, solar power can be used in remote areas without access to the grid, providing clean energy for all.

water cycle and energy

The water cycle is crucial for hydropower. The process begins with the evaporation of water, driven by the sun's heat.
The water vapor rises into the atmosphere and cools to form clouds.
Eventually, this water falls back to Earth as precipitation, such as rain or snow.
This cycle is continuous, ensuring a steady supply of water for hydropower plants.
Understanding the water cycle is essential for efficiently managing water resources and maximizing energy production.

atmospheric processes

Atmospheric processes play a significant role in renewable energy.
The movement of air masses, driven by temperature differences caused by the sun, creates wind energy.
Similarly, these processes are responsible for the water cycle, which is essential for generating hydropower.
By studying atmospheric processes, we can better predict weather patterns and optimize the placement of renewable energy systems like wind and hydropower plants.
This knowledge helps us harness these energy sources more efficiently and sustainably.