Question

edelle wants to design an outdoor fire pit. she wants to use two different materials in her design. material 1 must be able to conduct heat well and not break, because it will surround the fire. material 2 must not conduct heat well because it will be used to create a path to walk on around the fire pit. to begin her design, she researches the thermal conductivity of several materials.
which materials should edelle choose to build her fire pit?
material 1: gypsum
material 2: rock
material 1: rock
material 2: brick
material 1: brick
material 2: adobe
material 1: concrete
material 2: sand
worst conductors of heat
best conductors of heat

Explanation:

Material 1 needs to be a good heat - conductor. From the list, rock is one of the best heat - conductors. Material 2 needs to be a poor heat - conductor. Sand is the worst heat - conductor among the given options.

Answer:

Material 1: concrete, Material 2: sand