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The Complete Idiot's Guide to the Science of Everything Knowledge Check

Test your mastery of the core principles.

Question 1 of 4
What fundamental law governs the conservation of energy across physical processes?
Explanation: The first law of thermodynamics establishes that energy is conserved and merely changes forms.
Question 2 of 4
Why doesn't stomach acid dissolve the stomach itself?
Explanation: Specialized protective mucus and rapid cell turnover prevent the stomach from digesting its own tissue.
Question 3 of 4
What meteorological condition drives the high frequency of tornadoes in the US Midwest?
Explanation: The mixing of contrasting air masses over flat terrain creates severe atmospheric instability.
Question 4 of 4
Why are most plants green?
Explanation: Chlorophyll pigments absorb red and blue wavelengths efficiently while reflecting green light.