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| Question | Answer |
|---|---|
| crater | a bowl-shaped depression on a planet's surface, typically formed by impacts (meteorites), volcanic eruptions, or explosions, characterized |
| earthquake | Alaska's southern coast fter the magnitude 7.3 quake was felt throughout the region. There is no danger of a tsunami on the California coast after |
| geyser | rare hot spring that periodically erupts columns of hot water and steam, formed by underground water heated by magma, trapped by a unique |
| hot spring | hot springs can be safe for humans to bathe in, others can be perilously hot or contain dangerous |
| volcano | Mauna Loa in Hawaii, the largest active volcano, but the extinct underwater shield volcano Puhonu (Gardner Pinnacles) is actually the most massive |
| fossil | any preserved evidence of ancient life, like a dinosaur bone, ancient leaf, or even a footprint, that's usually millions of years old and found in the Earth's crust |