Multiple Choice
Where does the energy that powers the water cycle primarily come from?
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9. Photosynthesis
Introduction to Photosynthesis
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In the context of photosynthesis, where does the energy that drives the water cycle on Earth primarily come from?
A
The Moon's gravitational pull
B
Chemical energy from plants
C
The Sun
D
Geothermal heat from Earth's core
Verified step by step guidance1
Understand the context of photosynthesis: Photosynthesis is the process by which plants, algae, and some bacteria convert light energy into chemical energy stored in glucose molecules. This process is driven by energy from the Sun.
Recognize the role of the Sun in Earth's water cycle: The Sun provides the energy necessary for evaporation, which is a key step in the water cycle. Solar energy heats water in oceans, lakes, and rivers, causing it to evaporate into the atmosphere.
Eliminate incorrect options: The Moon's gravitational pull influences tides but does not provide energy for the water cycle. Chemical energy from plants is a result of photosynthesis but does not drive the water cycle. Geothermal heat from Earth's core contributes to localized phenomena like hot springs but is not the primary energy source for the water cycle.
Connect photosynthesis and the water cycle: Photosynthesis relies on sunlight, and the water cycle is also driven by solar energy. Both processes are interconnected through the movement of water and energy in ecosystems.
Conclude that the Sun is the primary energy source: The Sun's energy drives both photosynthesis and the water cycle, making it the correct answer to the question.
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