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Name: ____________________________ Date: _____________ Fluency Practice Minerals Do you remember the last time you picked up a pebble? 11 Maybe it was clear as glass. Minerals formed the colors and 22 patterns in the pebble. A mineral is a solid, non-living substance 34 that occurs naturally in rocks or in the ground. Every mineral has 46 Monday ______wpm Tuesday unique properties. The earth’s surface is rock, a solid substance 56 made of many minerals or of one mineral with different-sized 68 grains. 69 ______wpm Wednesday There are more than 4,000 minerals. Many of them look 78 alike. Scientists use the minerals’ physical properties to tell 87 ______wpm them apart. For example, scientists can compare the hardness 96 Thursday of two minerals by how easily they can be scratched. 106 The way a mineral reflects light is its luster. Two minerals 117 ______wpm may be the same color, but one may have a shiny luster and the 131 other a dull luster. 135 When you rub a mineral across a surface, the mineral leaves a streak of 149 powder. The colored powder can help scientists identify two minerals that look 161 alike but have different colored streaks. 167 Minerals might look alike and may share some properties, but they do not share 181 all properties! 183 Please read this passage aloud for one minute and write down the number of words you read. The goal of this type of reading is to practice fluency and expression. Happy Reading!