How Much Water is in An Apple? An Apple Theme Science Activity

Photo: © Amanda Morin

Goal of Activity: To create hypotheses and participate in a science experiment to answer the question "How much water is in an apple?"

Skills Targeted: scientific reasoning, scientific method, following an experiment protocol.

Apple theme activities don’t have to be limited to art projects for younger children. There are a number of apple theme science activities that you can do with older children, too.

How Much Water is in An Apple?

Apples, like many other fruits, have a high water content. The following experiment can help your child not only visualize, but also measure, exactly how much water is in an apple.

Materials Needed:

  • A food or postal scale
  • Apple
  • Elastic band or a piece of string
  • Apple Dehydration Log 


  1. Start the activity by talking about what your child knows about the taste of apples. Different varieties have different flavors, but what do they have in common? (They’re all juicy.)
  2. Cut the apple into quarters or eighths and remove the seeds.
  3. Weigh each of the apple pieces on the food scale and note the weight on the Apple Dehydration Log, along with a hypothesis of what is going to happen as the pieces of apple are left open to the air.
  4. Wrap an elastic band around the apple pieces or tie a piece of string around them. Then, find a place to hang them up to dry out. Note: Putting the apple on a paper plate/paper towel won’t let apple slices dry out evenly.
  1. Weigh the apple pieces again in two days, note the weight in the log and rehang to keep drying.
  2. Continue weighing the apple every other day for the rest of the week or until the weight no longer changes.
  3. Add the beginning weights for all the apple pieces together. Then add the final weights together. Subtract the final weight from the beginning weight. Ask: What’s the difference? How many ounces of the apple weight was water?
  1. Ask your child to write that information on the Apple Dehydration sheet to answer the question: How much water is in an apple?