QUESTION IMAGE
Question
- engage_match the following terms with the best definition.
| extrusive | felsic | intrusive | |
|---|---|---|---|
| an igneous rock that forms on earths surface; also called volcanic | ○ | ○ | ○ |
| melted rock at earths surface | ○ | ○ | ○ |
| melted rock within earths crust | ○ | ○ | ○ |
| containing a higher percentage of silica | ○ | ○ | ○ |
| containing a lower percentage of silica | ○ | ○ | ○ |
Brief Explanations
- For "an igneous rock that forms within Earth’s crust; also called plutonic" - this matches the definition of intrusive igneous rocks. So we select the circle under "intrusive" for this row.
- For "an igneous rock that forms on Earth’s surface; also called volcanic" - this is the definition of extrusive igneous rocks. So we select the circle under "extrusive" for this row.
- For "melted rock at Earth’s surface" - Melted rock (magma/lava) at the surface is lava, but in terms of the terms here, extrusive rocks form from lava (melted rock at surface) cooling. Wait, actually, "melted rock at Earth’s surface" is lava, but the term here - extrusive rocks form from lava. Wait, maybe I misread. Wait, the terms are extrusive, felsic, intrusive. Wait, maybe the third row: "melted rock at Earth’s surface" - actually, extrusive rocks are formed from melted rock (lava) at the surface. Wait, no, the definition for extrusive is rock formed on surface. But the "melted rock at surface" is lava. But maybe the question has some mix - but according to standard definitions:
- Intrusive: forms within crust (plutonic)
- Extrusive: forms on surface (volcanic)
- Felsic: high silica content
- Also, melted rock within crust is magma, at surface is lava. But the terms to match:
Let's re - list the standard definitions:
- Intrusive: igneous rock formed within Earth's crust (plutonic)
- Extrusive: igneous rock formed on Earth's surface (volcanic)
- Felsic: igneous rock with high silica content (higher percentage of silica)
- Melted rock within Earth's crust: magma
- Melted rock at Earth's surface: lava
But the terms given are extrusive, felsic, intrusive. So:
- Row 1: "an igneous rock that forms within Earth’s crust; also called plutonic" → intrusive (select intrusive column)
- Row 2: "an igneous rock that forms on Earth’s surface; also called volcanic" → extrusive (select extrusive column)
- Row 3: "melted rock at Earth’s surface" → extrusive? Wait, no. Wait, extrusive rocks are formed from melted rock (lava) at the surface. So maybe the third row's "melted rock at Earth’s surface" is related to extrusive (since extrusive rocks form from that). So select extrusive column for row 3.
- Row 4: "melted rock within Earth’s crust" → intrusive? No, melted rock within crust is magma, and intrusive rocks form from magma cooling within crust. So maybe the fourth row: "melted rock within Earth’s crust" → intrusive column? Wait, no, the term is about the rock, but the row is "melted rock...". Maybe the question has some inaccuracies, but following the given terms:
- Row 5: "containing a higher percentage of silica" → felsic (select felsic column)
- Row 6: "containing a lower percentage of silica" → this would be mafic, but since the only silica - related term is felsic, maybe there's a mistake, but if we have to choose, the opposite of felsic (high silica) is low silica, but the terms given are extrusive, felsic, intrusive. So maybe the sixth row is not related to felsic or intrusive, but since we have to choose from the three, maybe it's a misprint, but according to the given terms, we proceed with the correct matches:
- Row 1: intrusive
- Row 2: extrusive
- Row 3: extrusive (since extrusive rocks form from melted rock at surface)
- Row 4: intrusive (since intrusive rocks form from melted rock within crust)
- Row 5: felsic
- Row 6: This is a bit off, but maybe the question expects us to know that felsic is high silica, so the opposite (low silica) is not one of the terms, but perhaps it's a mistake. B…
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- "an igneous rock that forms within Earth’s crust; also called plutonic" → intrusive (select the circle under "intrusive" for this row)
- "an igneous rock that forms on Earth’s surface; also called volcanic" → extrusive (select the circle under "extrusive" for this row)
- "melted rock at Earth’s surface" → extrusive (select the circle under "extrusive" for this row)
- "melted rock within Earth’s crust" → intrusive (select the circle under "intrusive" for this row)
- "containing a higher percentage of silica" → felsic (select the circle under "felsic" for this row)
- "containing a lower percentage of silica" → This is not directly matching the given terms (extrusive, felsic, intrusive) as the given terms don't have a term for low silica (mafic), but if we assume a misprint and consider that the opposite of felsic (high silica) is low silica, but since we have to choose from the three, there might be an error. However, based on the given terms, we can only match the correct ones as above.