---
title: Water on Earth
created: 2026-05-25
updated: 2026-05-25
type: lesson_topic
subject: science
tags: ['earth-science', 'grade-2', 'homeschool', 'ngss', 'science', 'water-cycle']
weeks: [21]
source: Home_School/2nd_Grade/Science/
---
## Overview
Water on Earth — Science curriculum topic for 2nd grade.
**Weeks covered:** Week_21
## Description
Changes to Earth's surface — erosion, weathering, and geological processes.
## Related Topics
- [[ecosystems-and-interdependence]] (previous week)
- [[the-water-cycle]] (next week)
- [[science-curriculum-map]] (full Science curriculum overview)