The image provided is a "Rocks and Minerals Vocabulary Chart" that defines key terms related to rocks and minerals. Below, I will explain each term and its meaning as listed in the chart:
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1. Minerals
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Meaning: Found in nature; not a plant or animal.
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Explanation: Minerals are naturally occurring, inorganic solids with a definite chemical composition and crystalline structure. They are not living organisms like plants or animals.
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2. Rocks
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Meaning: Found in nature, not living; made from minerals.
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Explanation: Rocks are aggregates of one or more minerals (or mineral-like substances) bound together in nature. They are solid, non-living formations and can be composed of various combinations of minerals.
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3. Attributes
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Meaning: Characteristics that describe minerals, e.g., rough, makes a streak.
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Explanation: Attributes refer to the physical properties of minerals that help identify them. Examples include hardness, color, luster, streak, and texture.
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4. Texture
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Meaning: How something feels.
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Explanation: Texture describes the surface feel or internal structure of a rock or mineral. For example, a rock might have a coarse, grainy texture or a smooth, fine texture.
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5. Luster
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Meaning: How shiny a mineral is.
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Explanation: Luster refers to the way light reflects off the surface of a mineral. It can vary from metallic (shiny, reflective) to dull (non-reflective).
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6. Moh's Scale
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Meaning: A scale that rates the hardness of minerals.
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Explanation: Moh's Scale is a relative scale used to measure the hardness of minerals, ranging from 1 (softest, talc) to 10 (hardest, diamond). Hardness is determined by how well a mineral can scratch another mineral.
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7. Streak
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Meaning: Mark left on something from a mineral.
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Explanation: Streak is the color of the powder produced when a mineral is scratched across an unglazed porcelain plate (streak plate). This property helps identify minerals because the streak color may differ from the mineral's apparent color.
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8. Igneous Rock
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Meaning: A type of rock that is fire-made and is formed when melted rock cools.
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Explanation: Igneous rocks form from the cooling and solidification of magma (molten rock beneath the Earth's surface) or lava (molten rock on the surface). Examples include granite and basalt.
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9. Sedimentary Rock
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Meaning: A type of rock formed when sand, mud, pebbles, at the bottom of rivers, lakes, and oceans pile up.
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Explanation: Sedimentary rocks form through the accumulation and compaction of sediments (such as sand, mud, and pebbles) over time. These sediments are deposited in layers and eventually lithify (turn into rock) under pressure. Examples include sandstone, limestone, and shale.
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10. Metamorphic Rock
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Meaning: A type of rock that has changed through heating and squeezing.
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Explanation: Metamorphic rocks form when existing rocks (igneous, sedimentary, or other metamorphic rocks) are subjected to high temperatures and pressures deep within the Earth. This process alters their mineral composition and structure without melting them completely. Examples include marble (from limestone) and gneiss (from granite).
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Summary
This vocabulary chart provides definitions for essential terms related to rocks and minerals. Understanding these terms helps in identifying and classifying different types of rocks and minerals based on their physical and chemical properties.
Final Answer:
\boxed{\text{The chart defines key terms related to rocks and minerals, including their characteristics and formation processes.}}
Parent Tip: Review the logic above to help your child master the concept of rocks and minerals worksheet 3rd grade.
