Properties of materials - part 3

copper wire (inside)

plastic (coating)

Choose the correct words or phrases to complete the paragraph below.

In a power cable the wire is [pick one]made ofcovered with copper because it is [pick one]rigida conductor. It is [pick one]made ofcovered with plastic because it is [pick one]an insulatortransparent. The plastic is [pick one]toughrigid and [pick one]flexiblefragile.