Question

Sun is the source of all the energy in the world​

Answer 1

Answer:

The energy of the sun is the original source of most of the energy found on earth. We get solar heat energy from the sun, and sunlight can also be used to produce electricity from solar (photovoltaic) cells. The sun heats the earth's surface and the Earth heats the air above it, causing wind.

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Answer 2

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The sun warms the planet, drives the hydrologic cycle, and makes life on Earth possible. The amount of sunlight received on Earth's surface is affected by the reflectivity of the surface, the angle of the sun, the output of the sun, and the cyclic variations of Earth's orbit around the sun.

This principle is related to Energy Literacy

Principle 2: Physical processes on Earth are the result of energy flow through the Earth system.

How the amount of energy emitted from the sun (sun's luminosity) changes over time.

Why recent climate warming has not been caused by increases in the sun's energy output.

In addition to the axial tilt, factors that come into play in people's mental models include the belief that Earth orbits the sun in an elongated elliptical path; confusion about the relative size, motion, and distance of the earth from the sun; how light travels; the length of Earth's revolution around the sun; and even the period of rotation. One strategy to mitigate this common misconception is to ensure that the "reasons for the seasons" are adequately addressed in high school, when students have sufficient background in geometry and physics to grasp the concepts (McCaffrey & Buhr, 2008).

Temperature vs Solar Activity

A persistent misconception is that our recent climate warming is due to changes in the sun's incoming energy, rather than increases of greenhouse emissions. This can be addressed by examining records of solar output and comparing them to global temperature records. The data clearly shows that the sun's irradiance is not correlated with Earth's temperature.

Excellent explanations for this can be found at Skeptical Science: Sun and Climate: Moving in Opposite Directions and with a graphic from Bloomberg: What's Really Warming the World? This engaging graph is made with NASA data and model output.

Integrating Solutions - The science concepts that relate to solar radiation can be expanded to include solar energy engineering and technology, including solar ovens, passive solar design, solar thermal energy and solar electricity. This can help raise awareness for alternatives to the use of fossil fuel and create a forum for discussions about solutions to climate change that our society can adopt.

Teaching materials from the CLEAN collection

Albedo Effect

This figure shows how white ice reflects sunlight while darker ocean water absorbs sunlight. This is called albedo, or reflectivity.[reuse info]

Middle school

Feeling adventuresome? Amazing Albedo is a hands-on activity that involves measuring the temperature of different colored surfaces.

The Climate: A Balancing Act applet allows students to adjust parameters that affect Earth's energy balance: incoming solar radiation, the albedo effect, the greenhouse effect, and outgoing radiation.

Students can learn how orbital cycles and ice ages are well correlated with the Milankovitch Cycles Climate Applet.

This Seasons Interactive visualization tool can become the basis for open-ended exploration of how solar radiation varies with location and season.

The Solar Influence: Climate Change video from the National Academies can help reinforce the evidence that solar activity is not causing global warming.

References

What's the Sun's Role in Climate Change? - NASA offers an readable yet authoritative look at why solar activity, solar cycles, and sunspots are not related to today's climate warming. NASA has a related post that debunks the myth of an impending ice age.

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