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Refill EarthPlay

Choose Questions by Grade and Category

Filter the existing question library by grade band, subject, and water domain for a focused classroom round.

Browse subjectsOpen teacher tools
School students and an educator examine a water-quality sample while standing in a forest stream.

Question coverage

The matrix shows how current question families cross four grade bands and twelve water domains. Use it to find a focused starting point for a class.

Water domainK–23–56–89–12
Water properties and states 1 draft 1 draft 1 draft 1 draft
Water cycle and weather 1 draft 1 draft 1 draft 1 draft
Freshwater, watersheds and groundwater 1 draft 1 draft 1 draft 1 draft
Oceans and coasts 1 draft 1 draft 1 draft 1 draft
Aquatic ecosystems and biodiversity 1 draft 1 draft 1 draft 1 draft
Drinking water, sanitation and health 1 draft 1 draft 1 draft 1 draft
Pollution, plastics, nutrients and chemicals 1 draft 1 draft 1 draft 1 draft
Climate, droughts, floods and storms 1 draft 1 draft 1 draft 1 draft
Agriculture, food and household use 1 draft 1 draft 1 draft 1 draft
Cities, stormwater, wastewater and infrastructure 1 draft 1 draft 1 draft 1 draft
Energy, industry, data centers and AI 1 draft 1 draft 1 draft 1 draft
Stewardship, policy, equity, solutions and careers 1 draft 1 draft 1 draft 1 draft
Four educators measure river-water clarity during an outdoor hydrology workshop.

Build a category path

Combine grade and category controls to move from foundational vocabulary toward comparison, calculation, and systems reasoning.