PISA-Volcanic-Eruption lesson grade 9.pptx

pisa type questions in volcano

1. PISA Volcanic Eruption

2. Gianne loves hiking and enjoys visiting volcanic sites to learn more about Earth’s natural formations. On one of her trips, she notices that volcanoes come in different shapes and sizes, prompting her to research their classifications. She discovers that volcanoes are generally categorized into three main types: shield, cinder cone, and composite (or stratovolcano). Shield volcanoes, like those in Hawaii, are broad and have gentle slopes formed by flowing lava that spreads widely.

3. Cinder cone volcanoes, on the other hand, are smaller and have steep sides made of ash, cinders, and other volcanic debris. Composite volcanoes are tall and cone-shaped, built from layers of lava flows and pyroclastic materials, often producing the most explosive eruptions. Each type of volcano forms differently based on the kind of eruption and the materials involved. Gianne finds this fascinating and wonders how the structure and materials of a volcano determine its classification.

4. Which type of volcano is characterized by gentle slopes and is primarily formed by flowing lava that spreads over a wide area? A) Cinder cone, because it is made from volcanic debris that creates steep sides. B) Composite, because it forms tall cones through alternating layers of lava and ash. C) Shield, because it is formed by lava flows that spread widely and create gentle slopes. D) Composite, because it produces the most explosive eruptions and builds up tall structures.

5. END