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How Much Water Is in a Fruit?

Author(s): Nancy P. Moreno, PhD, Barbara Z. Tharp, MS, and Judith Dresden, MS.

Let’s Talk About It

This investigation demonstrates that oranges and apples are largely water. The volume of water will vary by the type and size of oranges and apples used. 

After the experiment has ended, help older students to convert the volume of water in the orange into a percentage. Compare the findings of each student group to see if they are consistent. A standard juice orange will displace about 140–150 mL of water and will yield 40–50 mL of juice.  

Next, have students convert the amount of water in the apple into a percentage. Once their calculations are complete, students will notice that the orange contains a higher percentage of water than the apple does. Other fruits, such as watermelons, have an even higher percentage of water.

The cells and tissues that make up living organisms are comprised mostly of water, but actual water content varies by species. For example, water makes up about 80% of an earthworm and about 70% of a human or a tree.


Funded by the following grant(s)

National Institute of Environmental Health Sciences, NIH

National Institute of Environmental Health Sciences, NIH

The Environment as a Context for Opportunities in Schools
Grant Numbers: 5R25ES010698, R25ES06932


Houston Endowment Inc.

Houston Endowment Inc.

Foundations for the Future: Capitalizing on Technology to Promote Equity, Access and Quality in Elementary Science Education