Curriculum
Science — Second Preparatory
Unit 1: Matter and Energy
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Unit 2: Matter and Chemical Reactions
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Unit 3: Energy Flow in Photosynthesis and Respiration
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Text lesson
Changes to Earth’s Surface
Changes to Earth’s Surface
Lesson summary
Lesson summary
- Internal factors earthquakes, volcanoes and the movement of tectonic plates.
- External factors weathering, erosion and deposition, caused by water, wind, ice and temperature change.
- Weathering breaks rocks in place, erosion moves the material, and deposition drops it in a new place.
- Mechanical weathering breaks a rock without changing its composition. Chemical weathering changes its composition.
Changes to Earth’s Surface · 7 / 7
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