Q:

Why is the sun important?

A:

Humans, animals and plants on Earth need the sun because it provides most of the energy required to survive in this solar system. Earth would be a very cold and lifeless planet if it did not get its light and heat from the sun. Similarly, the Earth's stays in orbit because of the gravitational pull of the sun.

Plants also need the sun's energy for the photosynthesis process used to manufacture food and oxygen. While a plant is an autotroph that make its own nutrients, animals and humans are heterotrophs that depend on autotrophs or other heterotrophs for food. Without food and oxygen animals and humans could not live on Earth.

Humans also need sunlight to manufacture vitamin D. This vitamin is necessary for the absorption of calcium that is important for strong bones and overall health.


Is this answer helpful?

Similar Questions

  • Q:

    What is the name of the star in our solar system?

    A:

    The star that shares the solar system with the Earth is the Sun. It is the star around which all the planets in the system revolve. According to About.com, the Sun weighs almost 99.86 percent of the total mass in the solar system.

    Full Answer >
    Filed Under:
  • Q:

    What is the third planet from the sun?

    A:

    Earth is the third planet in the solar system. Earth orbits the sun at a distance of roughly 93 million miles and is the only known planet capable of supporting life.

    Full Answer >
    Filed Under:
  • Q:

    What are the physical properties of the sun?

    A:

    The Sun is a star that comprises 99.8 percent of the total mass of the solar system, and it is made up of 92.1 percent hydrogen and 7.8 percent helium. It is almost a perfect sphere with a diameter of approximately 864,336 miles, which is more than 100 times that of the Earth.

    Full Answer >
    Filed Under:
  • Q:

    What is the temperature of the sun?

    A:

    The surface temperature of the sun is about 5,800 kelvins. The temperature at the core of the sun is at least 15,000,000 kelvins. Most of the sun's constituent particles at the surface are gaseous atoms, as no liquid or solid can exist at such high temperatures.

    Full Answer >
    Filed Under:

Explore