9. what role did gravity play in planet formation?
it pushed planets away from the sun it destroyed planetesimals
it helped objects attract and combine it stopped collisions from happening

10. why is earth described as unique?
it is the largest planet it has rigid and molten layers
it has rings it is made only of gas

part 2: answer the following questions in complete sentences
1. describe our solar system including what is the central object & the different things that orbit around it.

2. how does a nebula become a star?

3. how were the rocky planets formed in our solar system?

4. why are the smaller rocky terrestrial planets closer to the sun than the larger gas giants?

5. describe the formation of the solar system if there was no gravity.

Question

9. what role did gravity play in planet formation?
it pushed planets away from the sun	it destroyed planetesimals
it helped objects attract and combine	it stopped collisions from happening

10. why is earth described as unique?
it is the largest planet	it has rigid and molten layers
it has rings	it is made only of gas

part 2: answer the following questions in complete sentences
1. describe our solar system including what is the central object & the different things that orbit around it.

2. how does a nebula become a star?

3. how were the rocky planets formed in our solar system?

4. why are the smaller rocky terrestrial planets closer to the sun than the larger gas giants?

5. describe the formation of the solar system if there was no gravity.

Accepted Answer

### Multiple Choice Questions
# Brief Explanations:
For question 9, gravity's core role in planet formation is pulling space debris and small objects together to form larger bodies. For question 10, Earth's unique structure includes both rigid crust/upper mantle and molten inner layers, unlike gas giants or planets with rings.
# Answer:
9. It helped objects attract and combine
10. It has rigid and molten layers

---

### Part 2: Short Answer Questions
# Brief Explanations:
1. Outlines the solar system's central object and orbiting bodies.
2. Explains the gravitational collapse and heating process of nebula to star.
3. Details the accretion of rocky material for terrestrial planets.
4. Links solar heat and solar wind to the separation of planet types by distance from the Sun.
5. Explains that gravity is required to pull material together to form any solar system bodies.
# Answer:
1. Our solar system is centered on the Sun, a hot, glowing star made of plasma. Orbiting the Sun are eight planets (four rocky terrestrial planets close to the Sun and four gas/ice giants farther out), along with dwarf planets, moons, asteroids (mostly in the asteroid belt between Mars and Jupiter), comets, and small space debris.
2. A nebula, a cloud of gas and dust in space, begins to collapse under its own gravity. As the cloud shrinks, it spins faster, heats up, and becomes denser. The central region becomes hot and dense enough for hydrogen atoms to fuse into helium, creating a star; the remaining material forms a disk that can become planets or other solar system objects.
3. Rocky planets formed from the solid, rocky debris (like dust, rock fragments, and planetesimals) in the inner solar system. Gravity pulled this rocky material together, causing collisions and accretion that gradually built up larger and larger bodies until the four terrestrial planets (Mercury, Venus, Earth, Mars) formed.
4. Close to the Sun, temperatures are extremely high, which light, volatile materials like hydrogen and helium could not condense; only dense, rocky materials could solidify. The solar wind also blew the lighter gases outward from the inner solar system. Farther out, temperatures were cool enough for volatile materials to condense and accumulate into the large gas and ice giants.
5. If there was no gravity, the cloud of gas and dust that would form our solar system would never collapse or clump together. No central star (the Sun) would form, and there would be no force to pull debris into planets, moons, or other solar system bodies. The gas and dust would remain spread out and dispersed in space, with no organized solar system structure.

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

Multiple Choice Questions

Answer:

Part 2: Short Answer Questions