Grade Level: 3rd - 4th; Type: Life Science
We will be making a model of a cell membrane using very simple material. Think of a cell membrane as a filter. It only lets certain substances inside it. It functions to protect our cells from harmful bacteria, like filtering water.
- What type of sand was left not filtered?
- What type of sand was filtered?
Our bodies are composed of millions of cells, each cell having its own cell membrane. The cell membrane acts as a very important barrier from harmful viruses, bacteria, and other substances that could be bad for our cells.
- 2 peanut butter jars/any type of wide jar
- Screwdrivers or skewers of different sizes
- Sands of various sizes
- Tape (preferably duct tape)
- Take the jars and keep the lid on one of them.
- Use the skewers/screwdrivers to poke holes through the lids. Make sure there is a variety of sizes.
- Pour the sand into one jar.
- Tape both jars together at the lid of each facing the other’s lid.
- Make sure no sand falls out.
- Record your data: What sand was filtered and which was not.
Terms/Concepts: Filtering; Cell Membrane; Cell
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