1. What state or phase of material are crystals?

2. Which of the following best describes a crystal?

3. Which of the following is a way that crystals can form in nature?

4. What is crystallization?

5. What are the flat surfaces on crystals called?

6. Which of the following is not one of the seven basic crystal shapes?

7. What type of crystal is the hardest substance found on Earth?

8. What type of crystals are used for timing in watches and electronics?

9. What are the seven basic shapes formed by crystals called?

10. What type of crystals are formed in clouds when water freezes?