Q: Air temperature changes as what increases? Choices: - pressure - density - salinity - altitude A:
altitude

Q: What kind of equal and opposite forces cancel one another out when they act on the same object? Choices: - solid - exact - combined - balanced A:
balanced

Q: Of all the electromagnetic waves, which have the lowest frequencies? Choices: - X-rays - ultraviolet rays - gamma rays - radio waves A:
radio waves

Q: The risk of what is raised by overexposure to the sun? Choices: - particle cancer - flux cancer - brain cancer - skin cancer A:
skin cancer