Question:
Read this excerpt from A Black Hole Is NOT a Hole by Carolyn Cinami DeCristofano.
Reber had just one little problem. To explore the radio energy, he needed a radio telescope—a telescope that could detect invisible radio energy—but there was no such thing at the time. So he invented one. He built it in his backyard in Wheaton, Illinois. Late into the night, Reber probed the sky with his new telescope, using it to locate the source of the mysterious radio energy.
Reber mapped these signals from the sky and shared his findings. Astronomers followed up with new investigations and soon began reporting more signals. Over time, with better radio telescopes, they found that some radio sources appeared as paired patches, one on either side of a tiny dot. They called these sources "radio galaxies." They also discovered other, more starlike sources—intense dots of radio energy without patches. How strange. What could these quasars (short for "quasi-stellar radio sources") be? Were they related to the radio galaxies?
Which statement best describes the connection made in the excerpt?
A) The excerpt makes a connection between Reber's discoveries and the discovery of radio galaxies by later astronomers.
B) The excerpt makes a connection between the discovery of radio galaxies and the discovery of black holes.
C) The excerpt makes a connection between the invention of radio telescopes and the discovery of black holes.
D) The excerpt makes a connection between the discovery radio galaxies and the discovery of quasars.
Answer:
The correct answer is A.
Explanation:
The last sentence in Paragraph 1 and the first five sentences in paragraph 2 of the excerpt lends evidence to the above choice.
After Reber's shared his discovery, Astronomers follow up with more studies, invented more powerful radio telescopes which helped them discover more sources of radio signals. They called these sources Radio Galaxies.
Cheers!
