Ques: Q: A doorknob and a ferris wheel are examples of what type of simple machine? Choices: - ball and socket - lever and pulley - ball and axle - wheel and axle A:
Ans: wheel and axle

Ques: Q: Each kidney is supplied by a renal artery and what else? Choices: - spinal cord - brain vein - coronary artery - renal vein A:
Ans: renal vein

Ques: Q: Which orbitals do electrons fill first? Choices: - empty orbitals - charged orbitals - furthest from nucleus - closest to the nucleus A:
Ans: closest to the nucleus

Ques: Q: Kidney stones can form anywhere in what system? Choices: - digestive - respiratory - intestinal - urinary A:
Ans:
urinary