Question

number the steps of stellar evolution in the correct order.

1. step 1
2. step 2
3. step 3
4. step 4
5. step 5
6. step 6

cloud collapses under the force of its own gravitational attraction; usually triggered by a supernova.
nebular cloud of gas and dust.
stellar core heats as it grows; nuclear fusion begins and a star is born.
other gas and matter of the nebular cloud begin to rotate around the protostar, forming a flattened, disk.
condensed material begins to combine and form a core center. as it warms, a protostar is formed.
nuclear energy runs out; death; possible supernova.

Explanation:

To solve this, we analyze the stages of stellar evolution:

Step 1: Identify the initial stage

The process starts with a nebular cloud of gas and dust (this is the raw material for star formation). So Step 1: Nebular cloud of gas and dust.

Step 2: Trigger for collapse

Next, the cloud collapses under its own gravity (often triggered by a supernova). So Step 2: Cloud collapses under the force of its own gravitational attraction; usually triggered by a supernova.

Step 3: Forming the protostar’s core

After collapse, condensed material combines to form a core (which warms into a protostar). So Step 3: Condensed material begins to combine and form a core center. As it warms, a protostar is formed.

Step 4: Disk formation

Material around the protostar rotates, forming a disk. So Step 4: Other gas and matter of the nebular cloud begin to rotate around the protostar, forming a flattened, disk.

Step 5: Star birth (nuclear fusion)

The stellar core heats, nuclear fusion starts, and a star is born. So Step 5: Stellar core heats as it grows; nuclear fusion begins and a star is born.

Step 6: Star’s death

Finally, nuclear energy runs out, leading to death (and possible supernova). So Step 6: Nuclear energy runs out; death; possible supernova.

Final Order:

1. Step 1: Nebular cloud of gas and dust.
2. Step 2: Cloud collapses under the force of its own gravitational attraction; usually triggered by a supernova.
3. Step 3: Condensed material begins to combine and form a core center. As it warms, a protostar is formed.
4. Step 4: Other gas and matter of the nebular cloud begin to rotate around the protostar, forming a flattened, disk.
5. Step 5: Stellar core heats as it grows; nuclear fusion begins and a star is born.
6. Step 6: Nuclear energy runs out; death; possible supernova.

(If numbering the checkboxes, the order of the statements from top to bottom would be: Step 2, Step 1, Step 5, Step 4, Step 3, Step 6. So the checkbox numbers (from top to bottom) are 2, 1, 5, 4, 3, 6.)

Answer:

To solve this, we analyze the stages of stellar evolution:

Step 1: Identify the initial stage

The process starts with a nebular cloud of gas and dust (this is the raw material for star formation). So Step 1: Nebular cloud of gas and dust.

Step 2: Trigger for collapse

Next, the cloud collapses under its own gravity (often triggered by a supernova). So Step 2: Cloud collapses under the force of its own gravitational attraction; usually triggered by a supernova.

Step 3: Forming the protostar’s core

After collapse, condensed material combines to form a core (which warms into a protostar). So Step 3: Condensed material begins to combine and form a core center. As it warms, a protostar is formed.

Step 4: Disk formation

Material around the protostar rotates, forming a disk. So Step 4: Other gas and matter of the nebular cloud begin to rotate around the protostar, forming a flattened, disk.

Step 5: Star birth (nuclear fusion)

The stellar core heats, nuclear fusion starts, and a star is born. So Step 5: Stellar core heats as it grows; nuclear fusion begins and a star is born.

Step 6: Star’s death

Finally, nuclear energy runs out, leading to death (and possible supernova). So Step 6: Nuclear energy runs out; death; possible supernova.

Final Order:

1. Step 1: Nebular cloud of gas and dust.
2. Step 2: Cloud collapses under the force of its own gravitational attraction; usually triggered by a supernova.
3. Step 3: Condensed material begins to combine and form a core center. As it warms, a protostar is formed.
4. Step 4: Other gas and matter of the nebular cloud begin to rotate around the protostar, forming a flattened, disk.
5. Step 5: Stellar core heats as it grows; nuclear fusion begins and a star is born.
6. Step 6: Nuclear energy runs out; death; possible supernova.

(If numbering the checkboxes, the order of the statements from top to bottom would be: Step 2, Step 1, Step 5, Step 4, Step 3, Step 6. So the checkbox numbers (from top to bottom) are 2, 1, 5, 4, 3, 6.)