What can trigger the collapse of a molecular cloud quizlet?
What can cause a molecular cloud to collapse? Collisions with other molecular clouds, space winds, gravitational interaction with other nearby stars, the explosion of a nearby star or the cloud can collapse under its own weight.
What are reasons that gravity is important to star and planet formation?
Which of the following are reasons that gravity is important to star and planet formation? Gravity causes the cloud to collapse. Once bodies are large enough, gravity pulls them together to make even larger bodies.
How do clumps grow into planetesimals?
Clumps grow into planetesimals by: colliding with other clumps. -This series of colliding with other clumps helped form the planets we see today.
How would you explain the difference in cratering between these two pictures?
How would you explain the difference in cratering between these two pictures? The surface on the right has experienced more recent volcanism or erosion than the surface to the left. The two surfaces have had the same number of impacts, but volcanism or erosion has erased the marks in the image on the right.
Why doesn’t gravity immediately cause the collapse of all interstellar clouds?
When gas is compressed it becomes warmer. Therefore, if interstellar gas, even dense gas, begins to fragment and collapse due to gravity, the heating due to compression will make the fragments tend to resist further collapse. Without a way to get rid of this heat, the pressure will stop the collapse.
What are two events that might trigger a molecular cloud to begin collapsing?
A shock wave will cause the molecular cloud to collapse. The shock wave could either be from a violent event, like a supernova, or the stellar winds from young stars compressing the gas around them. What is the source of energy in a protostar?
What role does gravity play in the formation of stars?
As gravity compresses the core of a protostar, the temperature goes higher and higher. Eventually the temperature is high enough that the star starts fusing hydrogen into helium. When the outward pressure produced by the heating of the gas by fusion energy balances gravity, a stable star is formed.
What role does gravity play in the formation and motion of objects in space?
Every object in space exerts a gravitational pull on every other, and so gravity influences the paths taken by everything traveling through space. It is the glue that holds together entire galaxies. It keeps planets in orbit. It makes it possible to use human-made satellites and to go to and return from the Moon.
How did the Oort cloud form?
In short, gravity from the planets shoved many icy planetesimals away from the Sun, and gravity from the galaxy likely caused them to settle in the borderlands of the solar system, where the planets couldn’t perturb them anymore. And they became what we now call the Oort Cloud.
What is the clumping theory?
NASA scientists have found the first evidence supporting a theory that golf ball-size clumps of space dust formed the building blocks of our terrestrial planets. False-color image of Allendale meteorite showing the apparent golf ball size clumps.
How does the surface gravity on Garganzo compare with that on minutia?
How does the surface gravity on Garganzo compare with that on Minutia? It is less. An increase in mass will increase the surface gravity, but an increase in radius will decrease it as much as the radius squared.
What are the two reasons that the Earth appears to have relatively few impact craters choose all that apply?
There are two main reasons for the low number of craters. One is that our atmosphere burns up most meteoroids before they reach the surface. The other reason is that Earth’s surface is continually active and erases the marks of craters over time. The picture is the Barringer Meteorite Crater found in Arizona.
How are molecular clouds held together?
Molecular clouds are held together by: self-gravity. -Even though we tend to think of gases as having very little mass, molecular clouds are very large in size, so they have enough mass to hold themselves together via gravity. The search for extrasolar planets has uncovered a phenomenon astronomers call “hot Jupiter.”.
What is the relationship between gravity and cloud formation?
ⓐ Gravity determines the direction in which the system rotates. ⓑ Gravity causes the cloud to collapse. ⓒ Without gravity, tiny dust particles would never come together to form larger particles. ⓓ Gravity causes the collapsing cloud to form a disk because it acts downward more strongly than it acts inward.
What is the size of a molecular cloud?
Nearby molecular clouds are relatively small—only about a dozen parsecsor less in size and containing several thousand solar massesof gas—but the more distant giant molecular clouds, those found along the spiral arms of our Galaxies, extend for hundreds of parsecs and contain from 100,000 to 10 million solar masses of gas.
What causes a cloud to form a disk?
ⓑ Gravity causes the cloud to collapse. ⓒ Without gravity, tiny dust particles would never come together to form larger particles. ⓓ Gravity causes the collapsing cloud to form a disk because it acts downward more strongly than it acts inward.