Gold is ... metal / non-metal.
metal
Copper is a/an ...... conductor / insulator
conductor
Coal is a soft / hard rock.
soft rock
Iron is precious / base metal.
base metal
Lead is ferrous / non-ferrous metal.
non-ferrous metal
What is it?
a hard hat
What is it?
a face shield
What is it?
a self-rescuer
What is it?
a rock pick / pickaxe
What are they?
pliers
What is it?
chisel
A maintenance worker / mechanic fixes machines.
a mechanic
The miner is ... loading / blasting the muck into the truck.
loading
The miner is bolting / boring the hole in the wall.
boring
