Q: What measurement is used to describe the amount of water vapor in the air? Choices: - precipitation - barometric pressure - heat - humidity A:
humidity

(Question)
Q: What is the name of the iron-containing oxygen-transport protein in the red blood cells of all vertebrates? Choices: - plasma - platelet - ferric acid - hemoglobin A:
(Answer)
hemoglobin

Ques: Q: In what form is most of the earth's freshwater? Choices: - gas - liqued - steam - frozen A:
Ans: frozen

(Q).
Q: What is the number of protons in the nucleus? Choices: - element - metallic number - atomic mass - atomic number A:
(A).
atomic number

Ques:Q: What system is involved in diseases that include type 1 diabetes, rheumatoid arthritis and multiple sclerosis? Choices: - circulatory system - nervous system - digestion system - immune system A:

Ans:immune system

Ques:Q: Which layer of the earth is molten? Choices: - the inner core - the metallic core - the mantle - the outer core A:

Ans:
the outer core