How are nebulae and stars related? Select the three correct answers.(2 points)
Responses
Stars are pulled toward nebulae.
Stars form from nebulae.
Nebulae form from stars.
Nebulae are found inside stars.
Stars explode to form nebulae.
Nebulae explode to form stars.
The correct answers are:
- Stars form from nebulae.
- Nebulae form from stars.
- Stars explode to form nebulae.
The three correct answers are:
1. Stars form from nebulae.
2. Nebulae form from stars.
3. Stars explode to form nebulae.
The correct answers are:
1. Stars form from nebulae.
2. Nebulae form from stars.
3. Stars explode to form nebulae.
To understand the relationship between nebulae and stars, it is important to first define what these terms represent. A nebula is a vast cloud of gas and dust in space, while a star is a massive, luminous ball of plasma that emits energy through nuclear fusion.
1. Stars form from nebulae: Nebulae play a crucial role in star formation. A nebula is a region in space where the gas and dust particles can gravitationally collapse under their own weight. As the particles come together, they start to heat up and form a protostar. Over time, as more and more matter falls onto the protostar, it grows in size and density until the core becomes hot enough to ignite nuclear fusion, thus becoming a star.
2. Nebulae form from stars: Nebulae can also form from stars during various stages of their evolution. When a massive star exhausts its nuclear fuel, its core collapses under gravity, resulting in a supernova explosion. The explosion ejects outer layers of the star into space, creating a new nebula known as a supernova remnant. These nebulae can have various shapes, including spherical or elongated, depending on the type of explosion and the characteristics of the star.
3. Stars explode to form nebulae: As mentioned briefly in the previous point, when a massive star reaches the end of its life, it undergoes a supernova explosion. This explosion releases an enormous amount of energy and material into surrounding space, creating a nebula. The expelled material enriches the interstellar medium with heavy elements, including those necessary for the formation of new stars and planetary systems.
Therefore, the correct answers to the question are:
1. Stars form from nebulae.
2. Nebulae form from stars.
3. Stars explode to form nebulae.