Archimedes, a great Greek inventor, created the to help move water to a lower level.

Water Screw

Explanation:

Archimedes, a great Greek inventor, created the 'water screw' to help move water to a lower level.

Mass is explained as atoms that take up space and all these atoms are made up or lighter and heavy materials so iron is heavy and paper is not but there made up of atoms just like iron is

Explanation:idk tbh thats all I can give you home it helps bro