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Crystals Find out more about crystals and the answers to trivia questions sent with the kids science project on crystals. Trivia Questions Trivia Questions 1. What crystals can be found in the kitchen? 2. What is the hardest known crystal? 3. What elements make up Ammonium Monobasic Phosphate - (NH4)H2PO4? Find the answers to these kids science questions.
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Kids Science Library
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Science doesn't have to be complicated,
expensive or use specialized laboratory equipment. There are great science
projects that can be performed using common household items.
Whether you are a parent or a student trying to find an idea for a science project, a teacher looking for ideas for the classroom, or a science enthusiast who enjoys the delight of experimentation, you'll find what you're looking for in this book. |
Explore the allure of Earth's precious gemstones in this fantastic National Geographic video. Splendid Stones Video |
Just what are crystals anyway? A crystal is an organized grouping of atoms, or molecules. Each crystal has different properties and shapes. For example, sugar crystals are oblong and slanted at the ends; salt crystals are cubic. Some elements can make more that one crystalline form. Carbon, as graphite, will conduct electricity, act as a lubricant between moving parts, be used as a writing tool (a pencil) and strengthen of steel. As diamond, carbon is used as an industrial cutting tool and as a gemstone in jewelry.
Crystals can be used in many ways. Diamonds, rubies, sapphires, and emeralds have been the showiest use of crystals for thousands of years. They were highly valued due to their beauty and relative small amounts that exist in nature. In recent years chemists have been working on methods of creating some of these crystals in the laboratory with a lot of success.
Each different crystal vibrates at a specific frequency when an electric current is passed through it. The original radios were created using vibrating crystals to create the frequency to transmit signals. As radio technology improved, radio transmitters had several different crystals to allow transmission on different frequencies. Modern radios have large number of different frequencies used by radio stations. Vibrating crystals can be used for time keeping. A quartz clock uses the vibration of a quartz crystal to measure time. When the crystal has an electric current passed through it, the crystal will vibrate at 60 hertz (60 times per second). Check the Interesting Websites for more information on science of crystals listed on our webpage on the How Atoms Bond Together.
How to Grow CrystalsSugar Crystals (water, sugar, string, pencil, container)
The sugar crystals will grow slowly on the string over a period of several days. If you want the string to hang straight in the jar, tie a weight to the bottom of the string. Salt Crystals (water, sugar, string, pencil, container)
Two options for growing salt crystals:
Trivia Answers 1. What crystals can be found in the kitchen?
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