Structure of a Volcano worksheet - Free Printable

Explanation:
We need to label the parts of a volcano using the given word bank:

- magma chamber
- crater
- lava flow
- ash cloud
- secondary vent
- volcanic bomb
- throat
- main vent
- fumarole
- layers of lava and ash

Let’s match each label to its correct location based on standard volcano anatomy:

1. Topmost grey plume → This is the ash cloud, formed when explosive eruptions send ash and gas high into the air.

2. Small opening on the side of the volcano (not the main top) → This is a secondary vent, where magma can erupt from the flank.

3. The bowl-shaped depression at the very top of the volcano → That’s the crater, formed by collapse or explosion at the summit.

4. The narrow passage connecting the magma chamber to the surface → This is the throat, just below the crater.

5. The main central pipe through which magma rises → This is the main vent (often shown as the central vertical channel).

6. The large underground pool of molten rock → Deep below, the red/orange blob is the magma chamber.

7. The flowing red-orange material down the slope → That’s the lava flow.

8. The small steam/gas vents on the volcano’s surface (often shown as little puffs on the side) → These are fumaroles (they release steam and gases, not lava).

9. The scattered blobs flying through the air near the eruption → Those are volcanic bombs (solidified chunks of lava thrown out during eruption).

10. The layered green/brown outer slopes of the volcano → These represent layers of lava and ash, built up over many eruptions.

Now assign them to the 10 blank boxes in order (based on typical diagram layout — top to bottom, left to right, matching arrows):

- Top right (ash plume) → ash cloud
- Upper right side (small side opening) → secondary vent
- Top center (summit depression) → crater
- Just below crater (narrow neck) → throat
- Central vertical channel → main vent
- Deep underground reservoir → magma chamber
- Red flow down slope → lava flow
- Small gas vents on flank → fumarole
- Flying fragments → volcanic bomb
- Outer sloped layers → layers of lava and ash

Double-checking: All 10 terms are used exactly once, and all match standard volcano diagrams.

Final Answer:
ash cloud, secondary vent, crater, throat, main vent, magma chamber, lava flow, fumarole, volcanic bomb, layers of lava and ash