Ques: Q: The field of organic chemistry studies the structure and reactivity of compounds containing what element? Choices: - nitrogen - hydrogen - oxygen - carbon A:
Ans: carbon

Ques: Q: What changes the chemical composition of a substance and can only occur through a chemical reaction? Choices: - carbon changes - Oxygen Changes - mineral changes - chemical changes A:
Ans: chemical changes

Ques: Q: What helps to regulate consciousness, arousal, and sleep states? Choices: - hypothalamus - hippocampus - cerebral cortex - thalamus A:
Ans: thalamus

Ques: Q: A globe is the best way to make a map of what? Choices: - a continent - solar system - a city - whole earth A:
Ans:
whole earth