A simple water cycle in a bottle activity to explore weather science! It’s definitely fun to make fizzy eruptions and explosions, but it is also important to learn about the world around us. This simple science discovery bottle is a quick and easy way to learn about the water cycle!

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Science In A Bottle

Have you ever created and used a science discovery bottle? They are an awesome way to engage young learners in understanding the world around them.

We love this type of VOSS plastic water bottle because they display the science activity nicely and are great for reusing throughout the year. We have used these bottles for many of our simple science and STEM activities.

Check out…

How Does The Water Cycle Work?

The water cycle is a natural process that describes how water moves and changes states of matter between liquid, vapor (gas), and solid (ice) on Earth. The water cycle is important because it is how water gets to all the plants, animals and even us!! The steps of the water cycle are:

Evaporation

The water cycle works when the sun heats up a body of water and some of the water evaporates into the air. This might be water from lakes, streams, oceans, rivers, run off etc. The liquid water goes up into the air in the form of steam or vapor (water vapor).

Condensation

When this vapor hits cooler air it changes back to its liquid form and creates clouds. This part of the water cycle is called condensation.

Related Activity: Rain Cloud In A Jar

Precipitation

When so much of the water vapor has condensed and the clouds are heavy, the liquid falls back down to the earth in the form of precipitation. Precipitation can be in the form of rain, hail, sleet or snow.

Runoff

After precipitation, water can flow over the land, forming streams and rivers. This is called runoff. Picture raindrops flowing down the street or through a garden into a stream.

Related Activity: Stormwater Runoff Demonstration

Collection

The water from runoff collects in oceans, lakes, and rivers, starting the cycle again. It’s like a giant water reservoir that holds all the water until the sun warms it up and turns it into vapor, starting the process over.

Transpiration

Another way water returns to the atmosphere is through transpiration. Plants absorb water from the soil through their roots and release it into the air as water vapor through tiny openings in their leaves.

Related Activity: How Plants Breathe

Repeat

The water cycle is a continuous process. Water from the Earth’s surface evaporates, forms clouds, falls back as precipitation, and repeats the cycle over and over again.

Of course with this water cycle bottle, you can not see each stage completely, but it is a great hands-on project to go along with talking about the water cycle with your kids. It provides a simple visual for kids to see the changes!

Water Cycle In A Bottle

Also check out how to make a Water Cycle In A Bag as a fun alternative!

Supplies:

  • VOSS Plastic Water Bottle {or similar}
  • Water
  • Blue food Coloring {optional but helpful}
  • Sharpie

Instructions:

STEP 1: Go ahead and draw clouds, a sun, water and land on the sides of the bottle. We each made a bottle.

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STEP 2: Mix up about a 1/4 cup of water and blue food coloring for each bottle and pour the water into the bottle.

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STEP 3: Place by the window!

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water cycle activity for kidsPin

How Does The Water Cycle In A Bottle Work?

The water cycle in a bottle experiment is a simple but effective way to demonstrate the steps of the water cycle in a closed system. Here’s how it works and how it relates to the steps of the water cycle.

Evaporation: As the water in the bottom of the bottle absorbs heat energy from the light source (the sun or a lamp), it begins to evaporate, turning into water vapor.

    Condensation: After some time, you’ll notice water droplets forming on the inside surface of the bottle. This condensation occurs when the warm water vapor comes into contact with the cooler surface of the bottle. The water vapor changes back into liquid water.

    Precipitation: As more water vapor condenses on the surface of the bottle, the droplets may grow larger and eventually fall back into the water at the bottom of the bottle. This process demonstrates precipitation like rain.

    Collection: The water that collects at the bottom of the bottle represents the water that has fallen back to the Earth’s surface as precipitation. This collected water can then evaporate again when exposed to heat, completing the cycle.

    By observing the water cycle in a closed bottle, kids can see firsthand how water transitions between its three main states (liquid, gas, and solid) and how it moves through the various stages of the water cycle.

    Bonus Printable Spring Activities Pack

    If you’re looking to grab all of the worksheets and printables in one convenient place plus exclusives with a spring theme, our 300+ page Spring STEM Project Pack is what you need! Weather, geology, plants, life cycles, and more!

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