Experimenting with water in the summer is an engaging way to learn about science. Try this activity to learn about absorption.
Focus: Science
Will It Absorb Water? Gather materials, make predictions, and test to see which materials absorb or do not absorb water. Discuss the results.
Materials
- 2-4 items that will absorb water, such as a paper towel, construction paper, sponge, piece of fabric, cotton ball, coffee filter, baby diaper, or tissue paper
- 2-4 items that do not absorb water, such as aluminum foil, foam, wax paper, plastic wrap, plastic straw, marble, or coin
- Medicine dropper or pipette
- A small bowl of water
- Food coloring (one color)
- A pan in which to test items or place a small sample of each item in the sections of a muffin tin or ice cube tray
Directions
- Display the items to be tested in no particular order.
- Place a few drops of food coloring in the water. This makes the absorption easier to see.
- Explain that absorption is the act of taking in small particles through holes or small openings. Demonstrate this concept with a tissue or other item.
- Before testing each item, ask your child to predict if he thinks it will absorb the water.
- Have him place a few drops of water on the item.
- Ask him to describe what he sees.
- When finished, review which items absorbed the water and those that did not.
Extension
Place a stalk of celery (with the leafy greens attached), a leaf of cabbage (Napa works well), or a carnation in a jar or vase full of colored water to demonstrate water absorption in plants. Have your child predict what will happen. Check back daily to observe changes. It may take a few days to see the full effect.