Igneous and Ternary Word Scramble
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| Question | Answer |
| A dark colored igneous rock with no visible crystals cooled how? | quickly on the earth's surface |
| Large crystals found in a fine-grained groundmass can indicate what? | origin from a magma with an early intrusive phase followed by an extrusive phase and that it is a rock of mixed volcanic-plutonic origin |
| Igneous rocks with a two-stage intrusive-extrusive origin are recognized by a texture that is called what? | porphyritic |
| Igneous rocks with a texture that is so fine-grained that the crystals are too small to see is what? | aphanitic |
| Natural glass, such as obsidian, forms when magma cools how? | cools too rapidly for crystals to form |
| Igneous rocks formed by explosive volcanic activity have a texture that is termed... | pyroclastic |
| Which of the following is an indication of crystal size in an igneous rock? | texture |
| Which of the following is a fine-grained member of the felsic family? | rhyolite |
| Gabbro is chemically most similar to which of the following rocks? | basalt |
| Which of the following would most likely form from a mafic magma that cooled slowly underground? | gabbro |
| Felsic rocks are high in what? | silica |
| A vesicular felsic rock is called what? | pumice |
| Which of the following rocks is a member of the intermediate family? | andesite |
| What are the texture and composition of gabbro? | texture- coarse-grained (phaneritic) composition - mafic |
| What is the texture of tuff? | pyroclastic |
| In general, if magma cools quickly, will the crystals be smaller or larger? | smaller |
| In the diagram on the board, what percent of A does #1 have? | 60% |
| In the diagram on the board, what percent of B does #1 have? | 20% |
| In the diagram on the board, what percent of C does #1 have? | 20% |
| In the diagram on the board, what percent of A does #2 have? | 25% |
| In the diagram on the board, what percent of B does #2 have? | 40% |
| In the diagram on the board, what percent of C does #2 have? | 35% |
| In the diagram on the board, what percent of A does #3 have? | 10% |
| In the diagram on the board, what percent of B does #3 have? | 70% |
| In the diagram on the board, what percent of C does #3 have? | 20% |
| In the diagram on the board, what percent of A does #4 have? | 0% |
| In the diagram on the board, what percent of B does #4 have? | 25% |
| In the diagram on the board, what percent of C does #4 have? | 75% |
Created by:
gabriellehartmann21
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