What is osmosis for kids? Osmosis can be a tricky concept for kids to get their heads around. But here we have a simple osmosis definition and fun, hands-on osmosis science experiments kids will love! Watch gummy bears grow, experiment with potatoes, eggs and more. Easy science experiments for kids of all ages!
Osmosis Defined For Kids
Osmosis is the movement of water molecules across a semi-permeable membrane from an area of higher molecular concentration to a region of lower molecular concentration.
💡 A semi-permeable membrane is a barrier that allows some substances, like water, to pass through but not others.
Why Is Osmosis Important?
Osmosis is important because it helps regulate the balance of water and other substances in living things.
For example, osmosis helps maintain the right balance of water and other substances like salts and sugars in our cells. Without the process of osmosis, cells would not survive.
💡 Learn more about the structure of plant cells and animals cells.
Osmosis can also be seen in other everyday examples, such as when a plant absorbs water from the soil through its roots. The water moves from the soil, with a high water concentration, to the cells in the roots, with a low water concentration. Plants absorb mineral ions from the soil by active transport against a concentration gradient.
If the water concentration is the same on both sides of a semi-permeable membrane, osmosis will not occur. This is called a state of equilibrium or balance.
List Of Osmosis Experiments
Below are examples of osmosis experiments. These science experiments are quick to set up and easy to do at home or in the classroom.
Gummy Bear Experiment
Learn about the process of osmosis when you try this easy gummy bear osmosis experiment. Watch your gummy bears grow as you investigate which liquid makes them grow the biggest.
Candy Fish Experiment
Similar to our gummy bear experiment above, this time using candy fish. Investigate what happens when you add the gelatinous candy to a variety of liquids.
Egg Osmosis Experiment
Here is a fun egg experiment that shows osmosis. First, you will need to dissolve the shell of a raw egg. See our naked egg experiment for how to do that. The egg membrane that remains is a good example of a semi-permeable membrane.
Potato Osmosis Lab
Explore what happens to potato when you put them in concentration of salt water and then pure water. It is all to do with osmosis! You could also try this experiment with a carrot!
Get Your Free Printable Osmosis Information Sheet!
Download this free osmosis information sheet and journal pages to start investigations with osmosis!
Osmosis v Diffusion
Diffusion is also a physical process by which molecules move from high to low concentrations. Molecules, especially gases and liquids, tend to spread out to occupy all available space. Like osmosis, diffusion is a form of passive transport.
Think of someone spraying a fragrance into the air on one side of a room. Before long, you can smell the fragrance molecules on the other side of the room, as the fragrance has diffused throughout the room.
The difference between osmosis and diffusion is that osmosis is water movement across a semi-permeable membrane. Osmosis and diffusion occur because of a concentration gradient, which is a substance’s concentration difference between two areas.
Turn It Into A Science Fair Project
Science projects are an excellent tool for older kiddos to show what they know about science! Plus, they can be used in various environments, including classrooms, homeschools, and groups.
Kids can take everything they have learned about using the scientific method, stating a hypothesis, choosing variables, and analyzing and presenting data.
Want to turn one of these osmosis experiments into an awesome science fair project? Check out these helpful resources.
Helpful Science Resources To Get You Started
Here are a few resources that will help you introduce science more effectively to your kiddos or students and feel confident yourself when presenting materials. You’ll find helpful free printables throughout.
- Best Science Practices (as it relates to the scientific method)
- Science Vocabulary
- All About Scientists
- Free Science Worksheets
- DIY Science Kits
- Science Tools for Kids
- Scientific Method for Kids
- Citizen Science Guide
- Join us in the Club
Printable Science Projects For Kids
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- Know the Words Science vocabulary pack includes flashcards, crosswords, and word searches that illuminate keywords in the experiments!
- My science journal writing prompts explore what it means to be a scientist!!
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