Question

Fill in the blank. An object can be broken up by a planet's gravity once it passes the _______. The Jovian planets are composed primarily of _______ and helium. Hydrogen and helium don't exist in Earth's _______ because the terrestrial planets of Mercury, Venus, Earth, and Mars couldn't exert a strong gravitational pull on hydrogen and helium gas within the nebula. _______ is the planet closest to the sun, has almost no atmosphere, and what little atmosphere exists is constantly getting blown away by solar wind. The atmosphere of _______ is very hot and dense, comprised of approximately 95 percent carbon dioxide, and the surface is composed of molten bedrock. Respond to the following based on your reading. Briefly describe why an object might break up under the force of gravity as it approaches a planet. What happens if the planet is very dense? What if the planet is less dense? Briefly explain why the Jovian planets formed farther away from the sun than the terrestrial planets.

Answer 1

Answer:

1. Roche limit

2. hydrogen

3. atmosphere

4. Mercury

5. Venus

6. When an object passes the Roche limit, the strength of gravity on the object increases. If the density of the planet is higher, then the object can break up farther away from the planet. If the density is lower, then the Roche limit is located closer to the planet.

7. Farther out in the solar system, beyond the frost line, hydrogen was at a low enough temperature that it could condense. This allowed hydrogen to accumulate under gravity, eventually forming the Jovian planets.

Explanation: