One who touches a neveilah (animal carcass) but does not carry it — what is their status?
Halacha 1: touching the carcass makes one a primary derivative of impurity, but garments are only defiled when one carries the carcass, not when merely touching it.
Question 2
What is the status of the fat (chelev) of a kosher animal that died without ritual slaughter?
Halacha 5: the fat of a kosher animal that died is ritually pure; the verse permits it for use, indicating it does not carry carcass impurity.
Question 3
Which of the following parts of a carcass, when SEPARATED from the body, does NOT impart impurity?
Halacha 7: bones, horns, hoofs, hide, sinews, alal, sauce, and spices — all do not impart impurity once separated. The brain is like flesh (halacha 4) and does impart impurity.
Question 4
When can two half-olive pieces of carcass meat, joined together, impart impurity?
Halacha 12: two half-olive pieces on a skewer impart impurity when carried (since the carrier holds an olive-equivalent) but not when touched, because human joining does not constitute legal joining.
Question 5
If carcass meat becomes so decomposed that a dog would not eat it, what is its status?
Halacha 13: once carcass flesh decomposes and is unfit for a dog, it is completely pure — not even impure-food status applies.