Answer: Combustion Reaction
Explanation: A substance reacts with oxygen
Because the deep roots of big trees hold the soil and don't let it slip away simply by rain or wind.
Answer:
Explanation:
"Three hundred ten million, seven hundred sixty-three thousand, one hundred thirty-six".
a ceramic or metal container in which metals or other substances may be melted or subjected to very high temperatures.
"the crucible tipped and the mold filled with liquid metal"
a situation of severe trial, or in which different elements interact, leading to the creation of something new.
"their relationship was forged in the crucible of war"
