Are second cousins and step cousins related?

Answer 1

No.

Second cousins are grandchildren of two people who were siblings (brother or sister to each other)

Being once removed cousins means your at least a generation older or younger than your once removed cousin

Answer 2

Second cousins are people with whom you share a great-grandparent but not a grandparent.

"Step-Cousin" is not a "real" relationship term, but probably is used to mean a person who would be a cousin if you were the child of your parent's second spouse, when in fact you are the child of the first spouse, or viceversa. In that sense, you could have a step first cousin, step second cousin, etc. But they are not real cousins because you do not share any ancestor with them.

To add a little more clarity, "cousin" technically implies a blood relationship through at least one common ancestor. If you shared at least one grandparent with someone, one of each of your parents would be siblings to each other and you would be cousins. "Step" is a term referring to relationships that are created when an adult "steps" into an existing family as a new parent to kids who were born of a previous relationship. There is no blood connection but the relationship is not necessarily any less "real," valid, or worthwhile.

Answer 3

No they are still cousins, but not by blood.