Is sternum connected to any of the bones mentioned in James Weldon Johnson's Dem Bones?
Dem Bones is a spiritual song composed by James Weldon Johnson. The lyrics to Dem Bones mention the hip bone, back bone, and knee bone among others. The back bone is the spine, which is connected to the first 7 rib sets. The sternum, or breastbone, is a flat bone at the front center of the chest. The sternum and ribs are connected and make up the ribcage.
The answer is yes.

Did Terry Pratchett write about quantum mechanics?
“What're quantum mechanics?""I don't know. People who repair quantums, I suppose.”. "Granny Weatherwax wouldn’t know what a pattern of quantum inevitability was if she found it eating her dinner. If you mentioned the words ‘paradigm of space-time’ to her she’d just say ‘What?’ But that didn’t mean she was ignorant. It just meant that she didn’t have truck with words, especially gibberish.".
The answer is yes.

Is Pig Latin related to real Latin?
Pig Latin is based on English. It is formed by moving consonants and syllables. Real Latin is a separate language distinct from English.
The answer is no.

Could Scooby Doo fit in a kangaroo pouch?

Scooby Doo is a fictional cartoon Great Dane. Great Danes can be 30-34 inches in height. Kangaroo babies can fit in their mother's pouch until they're 10 weeks of age. A 10 week old kangaroo is much smaller than a Great Dane.
The answer is no.