ScienceGrade 3

Where Does a Puddle Go? Evaporation Investigation

Water doesn't disappear — it changes into invisible water vapor and floats away

Learning Objective

Students will learn that a puddle doesn't vanish — its water evaporates: liquid water gains energy from warmth (the sun) and turns into invisible water vapor that rises into the air — and that the same water later condenses back into clouds and rain as part of the water cycle (TEKS 3.6B — matter changes state between liquid and gas).

What You'll Learn

Warmth is the engine: the sun's energy gives water the zip to become vapor —
Wind and spread-out shapes speed it up; a covered puddle can't escape and stays put.
Evaporation is the "up" side of the water cycle — the same water rises, condenses
Earth's water has been cycling for billions of years — the drop in a puddle could

Words to Know

Evaporation: Liquid water warming up and turning into invisible water vapor.; The sunny puddle is evaporating fast.
Water vapor: Water in invisible gas form, floating in the air.; The vapor rose off the puddle into the sky.
Water cycle: The endless loop — water evaporates up, condenses into clouds, falls as rain, and evaporates again.; The puddle's water is riding the water cycle.
Condense: To turn back from vapor into liquid drops on something cool.; Vapor condenses on the bowl's ceiling.
Shade: A spot blocked from the sun — cooler, so slower evaporation.; The shady puddle barely shrank all day.

Check What You Learned

Quick Quiz

1 / 5

Where does the water in a puddle actually go?

Fun Facts

Puddle water doesn't disappear — it evaporates: liquid water gains energy from heat (mostly the sun) and changes into water vapor, an invisible gas that rises into the air
Source: NGSS 5-ESS2-1 water cycle; standard physical-science curricula
Evaporation rate depends on heat, wind, and surface area — a sunny puddle shrinks far faster than a shaded one, and moving air carries vapor away so more water can escape
Source: standard meteorology / classroom evaporation experiments
A covered puddle can't evaporate into open air — water vapor trapped under a bowl condenses on the bowl's cool underside and drips back down, proving the water went UP
Source: classic classroom evaporation/condensation demo
Water vapor rises, cools in the upper air, and condenses into the tiny droplets that make clouds — which then fall as rain, completing the water cycle
Source: NOAA / NGSS 5-ESS2-1
Earth's water has been continuously recycled through the water cycle for billions of years — the water in a puddle today has been ocean, cloud, glacier, and yes, part of ancient ecosystems
Source: USGS water-cycle materials
A puddle's edge shrinks inward in a predictable pattern — a chalk outline preserves the starting footprint and makes the shrinking measurable
Source: standard schoolyard evaporation activity

Lesson Info

Grade 3

Standards Alignment

TEKS 3.6B
describe and classify matter as solids, liquids, and gases and demonstrate changes of state by heating and cooling
5-ESS2-1
develop a model describing how water cycles between Earth's surface and atmosphere
2-PS1-1
describe and classify materials by observable properties