Nuclear Fusion In the Sun - Solar System Series

The video explains the Sun's massive gravitational field, which keeps planets in orbit. It delves into nuclear fusion, a process occurring in stars' cores under extreme pressure and heat, where hydrogen nuclei fuse to form helium, releasing vast energy. This energy sustains life on Earth. The Sun's fusion reactions are self-sustaining, and with over 92% hydrogen, it can continue for another 5 billion years.

What role does the Sun's gravitational field play in the solar system?

• It causes the planets to collide with each other.

• It repels the planets away from the Sun.

• It causes the planets to orbit around the Sun.

• It has no effect on the planets.

What is the primary element involved in the Sun's nuclear fusion process?

• Hydrogen

• Carbon

• Helium

• Oxygen

What happens to the matter during nuclear fusion in the Sun?

• It is completely destroyed.

• It turns into dark matter.

• It is converted into energy.

• It remains unchanged.

How long is the Sun expected to continue its nuclear fusion reactions?

• 5 billion years

• 1 billion years

• 10 billion years

• 500 million years

What percentage of the Sun is currently made up of hydrogen?

• 99%

• 50%

• 75%

• 92%