Question

Where are volcanoes usually found?

Answer 1

Step 1: Understanding the passage.
The passage explains that volcanoes occur due to openings in the Earth's surface where molten rock, ash, and gases escape. It specifically highlights that volcanoes are commonly located where the Earth's crust is being pulled apart or pushed together.

Step 2: Analyzing the options.
(A) In the middle of tectonic plates: Incorrect, since the passage says they are found at the edges, not the middle.
(B) Along the edges of tectonic plates: Correct, this is directly mentioned in the passage.
(C) Deep inside oceans: Incorrect, the passage does not limit volcanoes to oceans.
(D) Only on mountains: Incorrect, although volcanoes are mountains, the key factor is their location along tectonic plate boundaries.

Step 3: Conclusion.
The correct answer is (B) Along the edges of tectonic plates.

Answer 2

Step 1: Referencing the passage.
The passage clearly mentions that there are three types of volcanoes: strato volcanoes, shield volcanoes, and cinder cones.

Step 2: Conclusion.
Thus, the number of types of volcanoes described in the passage is three.

Answer 3

Step 1: Understanding definition.
A volcano is defined in the passage as a mountain with an opening in the Earth's surface.

Step 2: Explanation.
Through this opening, molten rock, ash, and gases escape from beneath the Earth's crust.

Step 3: Conclusion.
Hence, a volcano is a mountain with an opening that allows molten materials and gases to come out.

Answer 4

Step 1: Locate details in the passage.
The passage describes shield volcanoes as broad and flat in shape.

Step 2: Key characteristics.
They have gently sloping sides and a wide base, making them different from steep-sided volcanoes.

Step 3: Conclusion.
Therefore, a shield volcano is a broad, flat type of volcano with gentle slopes and a broad base.