Volcanoes: Eruptions (Science)

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Date:

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📝 Worksheet A — Fill in the Blanks (Enabling)

Use the word bank below to fill in the blanks. Each word may only be used once.

🔤 Word Bank

🌋 Part One: What Causes a Volcano to Erupt?

A1. A __________________ is a mountain or opening in the Earth's crust that can release hot melted rock and gases.

A2. Deep inside the Earth, melted rock is called __________________. It is very hot and contains dissolved gases.

A3. As magma rises, __________________ builds up inside the volcano because gases cannot escape easily.

A4. Sometimes a hardened __________________ of old rock blocks the opening of the volcano, trapping the gases inside.

A5. When the __________________ of gas becomes too great, the volcano is forced to __________________.

A6. An __________________ happens when gases and magma burst through the surface of the Earth with great force.

🧪 Part Two: Vinegar + Baking Soda — Why Does It Look Like an Eruption?

A7. In our experiment, the two __________________ that we mixed together were __________________ and __________________ (baking soda).

A8. When these two ingredients react, they produce a __________________ called __________________.

A9. This gas forms __________________ inside the liquid, which causes the mixture to __________________ and overflow — just like a volcano!

A10. The __________________ that overflows from the bottle is like lava flowing out of a real volcano.

A11. In a real volcano, it is __________________ from gases that forces magma upward. In our experiment, it is the trapped __________________ gas that pushes the liquid out.

Volcanoes: Eruptions (Science)

Name:

Date:

Class:

✏️ Worksheet B — Written Answers

Answer each question in full sentences. Use the sentence starters if you need help getting started. No word bank — use your own scientific knowledge and vocabulary.

🌋 Part One: What Causes a Volcano to Erupt?

B1. What is magma, and where is it found?
Sentence starter: "Magma is…"

B2. Explain how gas build-up causes a volcano to erupt. Mention the role of pressure in your answer.
Sentence starter: "I think the main cause of an eruption is…"

🧪 Part Two: The Chemistry Behind Our Experiment

B4. What two substances did we mix together in the experiment? What gas did they produce?
Sentence starter: "The two reactants were… and together they produced…"

B5. Explain why the mixture foamed and overflowed from the bottle.
Sentence starter: "The mixture overflowed because…"

B6. Extend: How is the vinegar and baking soda experiment similar to a real volcanic eruption? How is it different? Use scientific vocabulary in your answer.
Sentence starter: "This is like a real eruption because… However, it is different because…"