SCIENCE
EARTH SCIENCE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
gravity and temperature
|
|
|
inertia and pressure
|
|
|
gravity and pressure
|
|
|
Temperature and inertia
|
Detailed explanation-1: -These clouds are supported against gravitational collapse by their thermal pressure, but if the clouds get too big massive, gravity wins and they can start to collapse. This is the first step towards star formation.
Detailed explanation-2: -The dust and gases in a nebula are very spread out, but gravity can slowly begin to pull together clumps of dust and gas. As these clumps get bigger and bigger, their gravity gets stronger and stronger. Eventually, the clump of dust and gas gets so big that it collapses from its own gravity.
Detailed explanation-3: -Gravity pulls the atoms together, forming dense regions. Nebula becomes more dense and starts spinning. Forms a disk with a dense ball at the center called a protostar. Temperature and pressure increase, eventually forming a star.
Detailed explanation-4: -Nebula Formation: In essence, a nebula is formed when portions of the interstellar medium undergo gravitational collapse. Mutual gravitational attraction causes matter to clump together, forming regions of greater and greater density.