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Elements of the Earth Warm Up Activity: • Ancient Greeks believed that everything was made up of four basic parts or elements: fire earth air water • Scientists have since discovered at least 90 elements naturally occurring in the universe. QUESTION: Which of today’s known elements do you think the objects shown above share? Look at your periodic table and write the chemical symbol and chemical name of the element. Common Minerals in the Earth: Olivine Pyroxene Amphibole Mica Quartz These are examples of minerals, which form naturally in the Earth’s crust. What do these minerals have in common? How are they different? How can a few elements make up so many different things? • Minerals have a few of the same elements, but also include a few different elements, and are in different proportions. • It’s similar to baking different desserts, where most of the ingredients are the same (flour, sugar, eggs), but some other ingredients are different (chocolate, lemon). Elements in the Earth’s Crust http://www.quartzpage.de/gen_ori.html