Q: What are black holes? A:black holes are things in the universe that the gravity is so strong, even light cannot escape! they're also found usually in the center of galaxies.
Q: how big are black holes? A: black holes can be many sizes.For example, scientists say there are black holes the size of an atom but have the mass of a large mountain!there is also a black hole thats called supermassive. it has the mass of over 1 million suns!!! the black hole in the center of the milky way has the mass of over 4 MILLION SUNS!!!
Q:How do black holes form? black holes are made when the center of a large star collapses upon itself. That creates a supernova. Then it blasts a piece of star into space and BAM! Black hole.
Q:Why cant you see black holes? A:Well, its pretty obvious, black holes have really strong gravity right? Exactly, like I said, light cant escape...so they're invisible.