Types Of Volcanoes Worksheet Pdf - Fill Online, Printable ... - Free Printable

Worksheet: Eruptions and Forms of Volcanoes

#### Directions:
Identify each form of volcano and then fill in the chart with the appropriate information about each form.

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Step 1: Identify the Types of Volcanoes

The worksheet provides three figures, each representing a different type of volcano. Let's analyze them:

- Figure 1: This volcano has a steep slope and is composed primarily of fine ash and cinder. It is characteristic of a Cinder Cone Volcano.
- Figure 2: This volcano has a moderate slope and is built up from alternating layers of lava and ash. It is characteristic of a Composite Volcano (or Stratovolcano).
- Figure 3: This volcano has a gentle slope and is formed by the accumulation of fluid lava flows. It is characteristic of a Shield Volcano.

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Step 2: Fill in the Chart

Now, let's fill in the chart based on the characteristics of each volcano type:

| Form of Volcano | Type of Magma | Shape and Height of Volcano | Type of Eruption |
|------------------|---------------|----------------------------|-------------------|
| 1. Cinder Cone | Felsic | Steep, relatively small | Explosive |
| 2. Composite | Intermediate | Tall, steep-sided | Explosive |
| 3. Shield | Basaltic | Gentle, broad base | Effusive |

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Explanation of Each Column:

1. Form of Volcano:
- Cinder Cone: Small, steep-sided volcanoes made primarily of volcanic ash and cinders.
- Composite (Stratovolcano): Tall, steep-sided volcanoes built from alternating layers of lava, ash, and other volcanic materials.
- Shield: Broad, gently sloping volcanoes formed by the accumulation of fluid basaltic lava.

2. Type of Magma:
- Felsic: High silica content, viscous, and explosive (e.g., rhyolite or dacite).
- Intermediate: Moderate silica content, less viscous than felsic magma (e.g., andesite).
- Basaltic: Low silica content, very fluid, and non-explosive (e.g., basalt).

3. Shape and Height of Volcano:
- Cinder Cone: Typically small and steep due to the accumulation of ash and cinders.
- Composite: Tall and steep due to the alternating layers of lava and ash.
- Shield: Broad and gently sloping due to the accumulation of fluid lava.

4. Type of Eruption:
- Explosive: Characteristic of felsic and intermediate magmas, which are viscous and trap gases, leading to violent eruptions.
- Effusive: Characteristic of basaltic magmas, which are fluid and allow gases to escape easily, resulting in calm lava flows.

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Step 3: Answer the Additional Question

#### Question: What are the three types of eruptive products that volcanoes expel?
Volcanoes expel three main types of eruptive products:
1. Lava: Molten rock that flows out of a volcano.
2. Ash: Fine particles of pulverized rock and volcanic glass.
3. Gas: Gases such as water vapor, carbon dioxide, sulfur dioxide, and others.

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Final Answer:

\boxed{
\begin{array}{|c|c|c|c|}
\hline
\text{Form of Volcano} & \text{Type of Magma} & \text{Shape and Height of Volcano} & \text{Type of Eruption} \\
\hline
1. \text{Cinder Cone} & \text{Felsic} & \text{Steep, relatively small} & \text{Explosive} \\
\hline
2. \text{Composite} & \text{Intermediate} & \text{Tall, steep-sided} & \text{Explosive} \\
\hline
3. \text{Shield} & \text{Basaltic} & \text{Gentle, broad base} & \text{Effusive} \\
\hline
\end{array}
}