Q: What is the chief organ of the urinary system? Choices: - liver - bladder - lung - kidney A:
kidney

Q: How long can carbon be stored in sedimentary rock? Choices: - around 10,000 years - less than 1000 years - 22 weeks - millions of years A:
millions of years

Q: What is the term for the fast-moving air currents high in the troposphere? Choices: - gale force winds - ocean streams - global winds - jet streams A:
jet streams