Question
Most of the huge deposits of limestone rock in the earth were formed during Noah's flood. Limestone is a naturally occurring chemical compound known as the mineral CaCO3. Other than oxygen, what two elements make up limestone formations? Use the Periodic Table (given in last lesson) if necessary.
calcium
cobalt
cadmium
carbon
calcium
cobalt
cadmium
carbon
Answers
GPT-5 mini
Calcium and carbon.
(CaCO3 contains calcium (Ca), carbon (C), and oxygen (O); the two besides oxygen are calcium and carbon.)
(CaCO3 contains calcium (Ca), carbon (C), and oxygen (O); the two besides oxygen are calcium and carbon.)