Which of the following is used as a rating scale to grade gasoline?
The creation of our universe is said to have started with which theory?
When looking at an ocean, which of these is the color it mostly appears to be?
Also known as the polar aurora, what phenomenon is created when the solar wind gets kicked away by the Van Allen belts?
Caused by the bacteria Mycobacterium leprae, what disease may have reached Europe when the Persians under Xerxes invaded Greece?
Which of these is true of iron?
An average male alligator weighs how much?
Almost as bad as hurricanes are monsoons, winds that change direction with the seasons. What continent is most likely to be hit with monsoons?
In which part of an atom are the protons found?
Which theory states that living things come only from other living things?