How are nebulae and stars related? Select the three correct answers.(2 points)
Responses
Stars form from nebulae.
Stars form from nebulae.
Nebulae are found inside stars.
Nebulae are found inside stars.
Stars are pulled toward nebulae.
Stars are pulled toward nebulae.
Nebulae explode to form stars.
Nebulae explode to form stars.
Stars explode to form nebulae.
Stars explode to form nebulae.
Nebulae form from stars.
Nebulae form from stars.
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The correct answers are:
- Stars form from nebulae.
- Nebulae form from stars.
- Stars explode to form nebulae.
The correct answer is:
- energy of a nebula
Question
How can a planetary nebula be identified? Select the two correct answers.(1 point)
Responses
diffuse edges
diffuse edges
spherical shape
spherical shape
dark area
dark area
central star remnant
What does it mean to characterize a nebula as diffuse?(1 point)
Responses
Its edges do not have clear boundaries.
Its edges do not have clear boundaries.
It reflects only visible radiation.
It reflects only visible radiation.
Its edges have clear boundaries.
Its edges have clear boundaries.
It reflects only non-visible radiation.
The correct answer is:
- Its edges do not have clear boundaries.
What causes a supernova?(1 point)
Responses
force of gravity
force of gravity
force of a nebula
force of a nebula
energy of heat
energy of heat
energy of a nebula
The correct answers are:
- diffuse edges
- central star remnant
Multiple Choice
Is –7 + 9 = –9 + 7 true, false, or open?
(1 point)
Responses
true
true
false
false
open
The correct answer is:
- false
Is 4x – 3 = 19 true, false, or open?
(1 point)
Responses
true
true
false
false
open