Q: What is the study of macroscopic properties, atomic properties, and phenomena in chemical systems? Choices: - differential chemistry - thermal chemistry - molecular chemistry - physical chemistry A:
physical chemistry

(Question)
Q: Decay of what provides some of earth's internal heat? Choices: - ionic elements - decaying elements - radioactive compounds - radioactive elements A:
(Answer)
radioactive elements

Ques: Q: Carbon and what are the second and third most abundant elements in your body? Choices: - helium - mercury - calcium - hydrogen A:
Ans: hydrogen

(Q).
Q: What kind of muscle cells undergo twitch-type contractions with long refractory periods followed by brief relaxation periods, allowing the heart to fill with blood for the next cycle? Choices: - nervous muscle - skeletal muscle - smooth muscle - cardiac muscle A:
(A).
cardiac muscle

Ques:Q: In which state does matter need to be for nuclear fusion? Choices: - cells state - solid state - gaseous state - plasma state A:

Ans:plasma state

Q: What can be hard or even impossible to perform in a scientific sense? Choices: - hypothesises - idea - theorys - experiments A:
experiments