read the text. a black hole is an area in spa...

read the text. a black hole is an area in space that is so compact and stuffed with matter that its gravity is extremely strong. since black holes have such a powerful gravitational pull, they suck in material—including light—at very high speeds. black holes dont reflect any light, so they are completely invisible. if we cant see them, how do we know they exist? as black holes rapidly pull in surrounding material, the material is heated and emits x - rays that radiate into space. in this way, black holes have profound effects on the matter surrounding them. by studying these effects, astronomers are thus able to detect the presence of black holes. match causes with their effects. black holes reflect no light. scientists can infer the locations of black holes. black holes have very strong gravity. cause effect black holes are compactly stuffed with matter. black holes are invisible. material pulled in by black holes emits radiation.

Answer

# Brief Explanations: 1. Black holes being compactly stuffed with matter leads to very strong gravity as more matter in a small space increases gravitational force. 2. Black holes reflecting no light causes them to be invisible since we see objects from reflected light. 3. Material pulled in by black - holes emitting radiation allows scientists to infer the locations of black holes as they can detect the emitted radiation. # Answer: - Cause: Black holes are compactly stuffed with matter. Effect: Black holes have very strong gravity. - Cause: Black holes reflect no light. Effect: Black holes are invisible. - Cause: Material pulled in by black holes emits radiation. Effect: Scientists can infer the locations of black holes.