Volcanic activity can render some lakes quite acidic. That much is true. However, the process takes more time than "Dante's Peak" suggests.
Question 6 of 10
True or False: Tsunamis — like the ones seen in "Deep Impact" — slow down when they go from deep to shallow water.
The phenomenon is called "shoaling." And it also accounts for the fact that tsunami waves get taller in the shallows. This one, the movie got right.
Question 7 of 10
In "Godzilla" (1998), Manhattan's besieged by a giant lizard who reproduces asexually. Which of these reptiles can use the same trick?
the Komodo dragon
the green anaconda
both of the above
Virgin births have also been documented in Burmese pythons, a species that's become popular in the exotic pet trade.
Question 8 of 10
To split that giant asteroid in "Armageddon," the math suggests you'd need a bomb more than a billion times more powerful than which of these weapons?
the American bomb used in the 1945 Trinity nuclear test
the Soviet Union's famous "Big Ivan" bomb
Officially called Tsar Bomba, Big Ivan released 418,000 terajoules of energy when it was detonated in 1961. That was the biggest man-made explosion of all time. Physics students estimated the "Armageddon" asteroid would require 800 trillion terajoules of energy, so Bruce Willis wouldn't have been able to save mankind by detonating an H-bomb on its surface and splitting it before it hit Earth.
"Little Boy," the atomic weapon dropped on Hiroshima in 1945
Question 9 of 10
True or False: The Dorothy device from "Twister" was based on a real contraption.
The screenwriters drew inspiration from the barrel-shaped TOtable Tornado Observatory (or "TOTO"), a data-gathering instrument tested in the 1970s and 1980s.
Question 10 of 10
"Independence Day" opens with a present-day shot of an Apollo-era U.S. flag astronauts planted on the moon. What was wrong with the shot?
The flag was flapping in the breeze.
The flag still showed red, white and blue.
Scientists suspect that getting hit by unfiltered UV radiation from the sun — for decades on end — has most likely burned off the colors.