Q: The reactions between alkali metals and water are particularly vigorous and include the rapid production of large quantities of what gas? Choices: - helium - oxygen - carbon - hydrogen A:
hydrogen

(Question)
Q: What system of the body is responsible for producing hormones? Choices: - nervous system - regulatory system - homeostasis system - endocrine system A:
(Answer)
endocrine system

Ques: Q: Fuels according to the law of what, can never actually be "consumed"; it can only be changed from one form to another? Choices: - use of energy - expansion of energy - difference of energy - conservation of energy A:
Ans: conservation of energy

(Q).
Q: Smaller sized galaxies are known as what? Choices: - nebula - black holes - constellations - dwarf galaxies A:
(A).
dwarf galaxies

Ques:Q: In the case of transverse waves, the movement of the medium is perpendicular to the direction of the what? Choices: - friction movement - pressure movement - fuel movement - energy movement A:

Ans:energy movement

Question: Q: What is is a measurement of the force amplification of a machine? Choices: - mechanical push - mechanical pull - force multiplier - mechanical advantage A:
Answer:
mechanical advantage