Quiz Answer Key and Fun Facts
1. One rock is hollow inside, with purple amethyst crystals growing inside it. What is this called?
2. I have three rocks in front of me. The basalt is hard, dense, and black. The obsidian is black and glassy. The third rock is pumice, which is light, frothy, and full of little holes. What made these three rocks?
3. The rock where I live is white and chalky. Sometimes it has fossils of ancient sea shells. What kind of rock is this?
4. What kind of rock forms when limestone is baked at high pressure and temperature? Sometimes it is used for carving sculptures.
5. What do you call a rock made up of lots of little sand grains?
6. I have a rock which has big scratches on it, all going the same direction. I collected it from a place where there was a great big crack in the rock. Could an earthquake have caused these scratches?
7. I have a rock that has three kinds of crystals: pink, white, and black. The pink crystals are the mineral feldspar. The white crystals are the mineral quartz. The black crystals are the mineral mica. What kind of rock is this?
8. One of the prettiest rocks I have is light grey and shiny. It also has big red garnet crystals in it. What is this rock called?
9. Whenever you go rock hunting, it's a good idea to do some things to make sure you don't hurt yourself, and you don't annoy other people. Which of these should you do?
10. There are people who study rocks for a living! I'm one of them. What are these people called?
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