What is a significant characteristic of supermassive black holes in galaxies?
NASA | Swift Finds 'Missing' Active Galaxies

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Physics, Science
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5th - 12th Grade
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Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
They are smaller than the Sun.
They have millions of times the Sun's mass.
They are always inactive.
They emit only visible light.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do astronomers detect emissions from active black holes?
By counting the number of stars around them.
By observing them only during the day.
By measuring the sound they produce.
By analyzing the angle of view and the surrounding disk.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What role does NASA's Swift satellite play in black hole research?
It measures the temperature of black holes.
It builds a sensitive X-ray map of the sky.
It captures images of black holes in visible light.
It records the sound of black holes.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What historical event increased the activity of black holes?
The extinction of dinosaurs.
Frequent galaxy mergers about seven billion years ago.
The formation of the solar system.
The Big Bang.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of the cosmic X-ray background peak?
It marks the beginning of the solar system.
It indicates the end of the universe.
It shows the time when galaxy mergers were frequent.
It represents the birth of the first stars.
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