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Grade 9
Matter Cycles
15. Biogeochemical
15.1 Water Cycle, Global water distribution
The Water Cycle & Global Water Distribution: Earth's Most Essential Biogeochemical System
Discover how water continuously moves through Earth's reservoirs and why accessible freshwater is far scarcer than it appears on our blue planet.
What You'll Learn
Earth's water cycle moves water continuously through interconnected global reservoirs.
Approximately ninety-seven percent of Earth's water exists as ocean saltwater.
Glaciers and ice caps store nearly seventy percent of all Earth's freshwater.
Key terms include aquifer, cryosphere, watershed, and thermohaline circulation concepts.
What You'll Practice
1
Students identify percentages of freshwater stored in different Earth reservoirs.
2
Learners match vocabulary terms like aquifer, cryosphere, and blue water.
3
Practice questions test understanding of evaporation, infiltration, and groundwater recharge.
Why This Matters
Understanding the water cycle and global water distribution is fundamental to addressing freshwater scarcity, environmental sustainability, and the management of Earth's most essential natural resource.
This Unit Includes
Practice exercises
Learning resources
Skills
Water Cycle
Freshwater Distribution
Aquifer
Cryosphere
Evapotranspiration
NS Curriculum Aligned