Carry the causes and effects through vivid spoken explanation and discussion.
Sound the events
Use the short eruption/earthquake footage as audio first — play it with the screen off and ask students to describe what they hear and infer what's happening, then watch to confirm. Discuss how the sounds (rumbling, cracking) hint at the energy being released.
Explain-it-back chains
After the I-do, students explain the cause of an earthquake and a volcano to a partner using a sentence frame: "An earthquake happens when ___, and this changes the surface by ___." The partner checks both halves are there.
Think-pair-share to finish
The consolidation think-pair-share is already spoken — extend it by asking each pair to teach their "one way the surface changed" to a second pair, so every student explains aloud.