Rock out with Earth’s explosive eruptions, sparkling gems, and drifting continents – show us you’re the ultimate rock star!
What is the name of the scale ranking minerals from the softest (talc, 1) to the hardest (diamond, 10)?
Mohs scale
What geologic belt, shaped like a horseshoe and home to about 75% of the world’s active volcanoes, rims the Pacific Ocean?
Ring of Fire
Which Indonesian volcano’s cataclysmic 1883 eruption collapsed its summit and formed a caldera?
Krakatoa
Which famous transitional fossil discovered near Solnhofen, Germany, bridges the evolutionary gap between non-avian dinosaurs and birds?
Archaeopteryx
Driven by slow mantle convection, which theory explains continental drift and earthquake activity?
Plate tectonics