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Grade 1 (age 6-7)

Water Cycle

Water Cycle

Water is one of the most precious things we need to live. We drink, wash, and cook with it, and it fills the rain, rivers, ocean, and clouds. It becomes hard ice when frozen and invisible vapor when boiled, traveling from rain to river to ocean to cloud. Move the slider to follow water one stage at a time.

Where Does Water Come From?
0 Rain
💧 Water Travels!
①Rain falls from the sky
②Rainwater flows into rivers
③Rivers carry water to the ocean
④Ocean water rises as vapor
⑤Vapor gathers into clouds — and rains again!
Water Changes Form
🧊 Water is a Master of Disguise!
①Water frozen → ice (solid)
②Water boiled → vapor (gas)
③Vapor cooled → water droplets
④Same water in three different forms!
Water is Precious
🌏 Earth's Water
①70% of Earth is water — but very little is drinkable
②Humans cannot live 3 days without water
③Plants and animals all need water
④Saving water is so important!
Summary
🎯 Water Cycle Summary
①Water travels: rain → river → ocean → vapor → cloud
②This is called the "water cycle"
③Water comes in three forms: ice, water, vapor
④Water is essential and precious for all life!
Examples and Unit Test
Example 1
Starting from rain, in what order does water travel? Say it in order.
1
Rain falls from the sky and the rainwater flows into a river.
2
The river gathers in the sea, and seawater turns into vapor that rises and becomes a cloud.
▸ Rain → river → sea → vapor → cloud → rain again
This way water keeps going around is called the water cycle.
Example 2
Water changes into three forms. Say how it changes.
1
When you freeze water it becomes hard ice, and when you boil it, it becomes vapor.
2
When the vapor cools, it turns back into water drops. It is all the same water.
▸ Ice (solid) · water (liquid) · vapor (gas): three forms of the same water
Depending on the temperature, water changes form into ice, water, or vapor.
Unit Test
What does water become when you freeze it?
①Vapor
②Ice
③Cloud
④Rain
⑤River
▸ ② Ice
1
When you freeze water cold, it becomes hard ice (a solid).
2
When you boil water it becomes vapor (a gas), and when it cools it turns back into water.
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