DepEd MELC reviewer for Grade 10 Science, Quarter 1. Master the concepts, tables, and common-mistake warnings below.
Plate Boundaries
| Boundary | Motion | Result |
|---|---|---|
| Divergent | Plates move apart | New crust, rifts |
| Convergent | Plates collide | Mountains, trenches, volcanoes |
| Transform | Plates slide past | Earthquakes (faults) |
DI-vergent = DI-vide (apart). CON-vergent = COME together. Transform = slide past.
Evidence for Plate Movement
Continental drift is supported by matching coastlines, fossils, and rock types across continents, plus seafloor spreading.
Earthquakes and Volcanoes
Most occur along the Pacific Ring of Fire, where the Philippines sits — explaining frequent seismic and volcanic activity.
The Ring of Fire
The Pacific Ring of Fire is a horseshoe-shaped zone of intense earthquakes and volcanoes around the Pacific Ocean. The Philippines sits along it.
This is why the country has frequent quakes and ~24 active volcanoes.
Before your test, make sure you can confidently do each of the following:
- Explain and apply Plate Boundaries.
- Explain and apply Evidence for Plate Movement.
- Explain and apply Earthquakes and Volcanoes.
- Explain and apply The Ring of Fire.
Re-read any section above where you hesitate, then try the worked example again without looking.