'Part of a corkscrew is this type of simple machine reworked into a spiral form'
an inclined plane (ramp later ruled acceptable)
SCIENCE: Part of a corkscrew is this type of simple machine reworked into a spiral form
Part of a corkscrew is this type of simple machine reworked into a spiral form
Part of a corkscrew is this type of simple machine reworked into a spiral form
SCIENCE
an inclined plane
SCIENCE