Why is the Sun important for life on the Earth for Class 4?

It radiates light and heat, or solar energy, which makes it possible for life to exist on Earth. Plants need sunlight to grow. Without heat from the sun, Earth would freeze. There would be no winds, ocean currents, or clouds to transport water.

What will Earth be like in a billion years?

In about one billion years, the solar luminosity will be 10\% higher than at present. This will cause the atmosphere to become a “moist greenhouse”, resulting in a runaway evaporation of the oceans. As a likely consequence, plate tectonics will come to an end, and with them the entire carbon cycle.

Will Earth be able to sustain life if it remained in its position and the Sun was a massive star?

Jagadheep: No, the Earth will not be able to support life if the Sun becomes a giant star. Giant stars have large radii as their name implies. The Sun’s luminosity and radius have been increasing since it started life and will continue to gradually increase in this manner for another 4.5 billion years or so.

Do we need the sun to survive?

The sun is the source of all heat and light energy on Earth. This organic matter contains energy that was first produced by the sun. Humans get our energy from the food we eat, and all of that food is derived from the energy of the sun. So, we need the sun to survive.

What will happen if the sun stops shining?

With no sunlight, photosynthesis would stop, but that would only kill some of the plants—there are some larger trees that can survive for decades without it. Within a few days, however, the temperatures would begin to drop, and any humans left on the planet’s surface would die soon after.

What are the things needed in order for a planet to support life?

What Are the Factors that Make the Planet Habitable?

• It has to be a comfortable distance away from a star (Habitable Zone)
• The stars around it have to be ‘stable’.
• It should not have a very low mass.
• It must rotate on its axis and revolve.
• It should have a molten core.
• It should hold an atmosphere.