Earth Systems
📋 What it is
Earth’s systems — land, water, air, and life — constantly interact and cycle materials.
🗣️ Coach says
Earth isn’t four separate things — its land (geosphere), water (hydrosphere), air (atmosphere), and living things (biosphere) constantly swap materials. Water evaporates from oceans, rains on land, feeds plants, and returns. The systems are gears that turn each other.
🧠 Memory hook
Land, water, air, life — four systems that cycle materials and drive each other.
😂 Giggle
What did the beaker say to the test tube?
"You're tubular!"
😲 Whoa!
Every water molecule you drink has cycled through Earth for billions of years — you might be drinking water that once flowed past a dinosaur.
✅ Quick check: Rain falls, feeds a river, evaporates, and falls again. Which Earth systems interact here?
Say your answer out loud first — then reveal.
The water (hydrosphere), air (atmosphere), and land (geosphere) — and living things too; the systems cycle materials between them.
Earth’s systems exchange matter, like water, continuously.
🧪 Try it! (2 minutes)
Trace a raindrop’s journey: cloud → ground → river → ocean → evaporate → cloud. It’s a loop across systems.