What material makes up earth's outer core?
a. a liquid iron-nickel alloy
b. basalt
c. peridotite
d. a solid iron-nickel alloy

Question 15 of 50 which of the following equipment is strongly recommended when cleaning a firearm? a, arm guards a, arm guards arm guards b, black powder or its equivalent b, black powder or its equivalent black powder or its equivalent c, bullet puller c, bullet puller bullet puller d, latex gloves d, latex gloves latex gloves