Why is water a limited resource? Because water never leaves Earth's system, and new water cannot be introduced. This is the focus of a video that describes how the biosphere (living things) fits into the water cycle.

Concepts

the water cycle, water, non-renewable resources, natural resources, the biosphere

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Additional Tags

science

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Instructional Ideas

• Use this episode to introduce water conservation

Classroom Considerations

• The 10th in a series of 22 videos that discuss Earth's spheres and natural resources 
• Concepts from the previous videos are reviewed at the beginning of the episode
• An investigation explores the water cycle over time, and demonstrates how dinosaur urine was incorporated into the water cycle and turned into water through evaporation

• This video is hosted on YouTube

Pros

• Designed for Next Generation Science Standards

Cons

• None