Hands-on outdoor science activities for children, such as this human sundial experiment, can help children learn how shadows are created, and, measure the earth’s rotation.
This human sundial outdoor science experiment and activity for kids can help children learn about shadows and the rotation of the earth around the sun. Most children think that the sun moves across our sky throughout the day. Conducting outdoor science experiments, such as making a human sundial, can help kids begin to understand that it is actually the Earth that is rotating! You might also enjoy five ways to have fun with shadows.
Children in elementary school, junior high, and even high school can learn a lot by conducting a human sundial outdoor shadow science experiment. I will never forget what I learned as a result of a human sundial experiment I did with my classmates in elementary school. I stayed late that day to admire the beautiful human sundial tracings that we made all over the playground, in an attempt to make sense of it all. That’s the power of hands-on learning activities, like this human sundial science experiment for kids. Or, try this shadow art STEAM project.
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Shadow Science Experiments for Kids: Make a Human Sundial
Making a human sundial is one of my favorite childhood science experiments. I remember making human sundials for the first time with my classmates when I was in elementary school. We marched out to the playground together to trace our shadows and record our observations in our science notebooks several times that day.
Everyone was assigned a partner and we each designated one person as the tracer, and the other as the trace. We worked together in pairs to record our observations and answer the questions our teacher asked us. (For more fun outdoor learning ideas check out birding for kids.)
We had so much fun I will never forget that day or what I learned as a result. I was so excited to share it with my daughter, that I decided to try it with her one day. She was a bit young the first time we made a human sundial, but she loved it! Scroll down to learn how to conduct your own human sundial shadow science experiment and observations. Or try magnet fishing!
Related: Shadow Art Outdoor Science
Outdoor Shadow Science Experiments Supplies
- Open space with no shadows and no clouds overhead. Driveways, parking lots, and playgrounds work well.
- Sidewalk chalk
- Camera
- Tape measure
- Science notebook or nature journal and a pen or pencil to record observations (optional)
Human Sundial Shadow Science Experiments: Recommended Reading for Kids
Help children learn more about shadows, how they are formed or made, and the movement of the sun and the earth through our solar system with the children’s book recommendations below!
- What Makes a Shadow
- The Next Time You See a Sunset
- Tell Me Why There is Day and Night
- Light is All Around Us
Related: Rainbow Science for Kids
How to Make a Human Sundial Step-by-Step Directions
Read through the easy step-by-step instructions below to learn how to conduct a human sundial science experiment before getting started, so you understand the steps involved in this hands-on science activity for kids and know what to expect.
1. Conduct your human sundial science experiments on a sunny day when no clouds, rain, or snow is expected.
- It is not possible to trace shadows all day unless it is sunny all day, so do your best to choose a bright sunny cloudless day to do your experiments.
- If clouds move in during the day you will have to scrap your human sundial shadow science experiments for another day.
2. Find an open area at school or near your home where the sun shines all day to make a human sundial.
- Find a wide-open spot that will be sunny all day. Playgrounds, driveways, large parking lots, the top level of a parking structure, rooftop patios, and large open pool decks usually work well.
- Make sure you have enough space in all directions around you, shadows of trees, poles, cars, and everything else can grow long, and houses often cover driveways (like ours did).
- If there are trees or structures near the area you are considering, check the area in the morning, at mid-day, and in the evening to make sure that the area is not shadowed at any time of the day. You need the sun on it to be able to trace your child’s shadow!
- Remind yourself that shadows move and change throughout the year, so a spot that works in the winter may not work in the summer and vice versa.
- If you are doing this with a class split them up in small groups (or pairs) and make sure the children are spread far enough apart to make their human sundials. You will need about 10-20 feet between each group or pair of students.
- Another option is to make one sundial with the whole class. Make sure that you trace the same person throughout the day if you choose this option.
3. Place an ‘X’ on the spot where the person will stand each time they have their shadow traced.
- Place an ‘X’ on the spot that you want your child to stand, or find some other way to mark the area in a way that will last all day and not move.
4. Use sidewalk chalk to trace the person’s shadow at least 3 times throughout the day.
- If you are working with a class have them trace each other’s shadows.
- Morning, mid-day, late afternoon, and/or early evening are great times of day to trace shadows for these outdoor science experiments.
- Think of mealtimes as your cue to trace shadows, or set an alarm to go off.
- My daughter and I did our shadow tracings and took the photographs shown in this post every two hours at 8:30 am, 10:30 am, 12:30 pm, 2:30 pm, and 4:30 pm during the spring of 2016 in Northern California.
Optional steps to complete each time you trace a shadow for the sundial:
- Use sidewalk chalk to note the time of day that it was taken next to each tracing.
- Invite children to describe their shadows each time they take them. (long and skinny, short and fat, etc.)
- Encourage them to record this observation in their science notebook or nature journal.
- Note the general location of the sun in the sky in your notebook when you make each tracing.
- Measure the length of your child’s shadow each time you trace it and record it in your notebook.
- Ask your children to predict where their shadow will be and what it will look like at the next tracing time.
- Take photos and/or record all other observations in a scientific notebook. (optional)
5. Invite children to compare observations and formulate a hypothesis.
- Use this activity as a platform to discuss why the shadow changes throughout the day and throughout the rest of the year.
- Ask your kids the questions below (in the next section–scroll down) to get them thinking.
- Later you can explain that our earth spins on its axis in a day and makes its way around the sun in a year to produce the changes that we see in our shadows.
Optional Questions to Ask During and After Human Sundial Shadow Science Experiments
- How do you think shadows are made?
- What did you observe about your shadow and the sun?
- Did the sun move? If yes, which direction?
- In what direction did your shadow move?
- Are the tracings the same? Why or why not?
- When was your shadow the longest? When was it the shortest?
- Why do you think that your shadow changes throughout the day?
- Do you think that your shadow also changes throughout the year?
Related: How to Make and Keep a Nature Journal
Human Sundial Shadow Science Experiments
To extend this human sundial shadow science activity conduct the experiment on or close to the summer solstice, fall equinox, winter solstice, and spring equinox and record the differences.
Taking photographs and recording your observations in a nature journal or science notebook is a good way to keep track of the differences throughout the year.
Related: Art and Science: Experiment with Watercolor Resist
Human Sundial Outdoor Science Experiments: Our Process
I had a hard time finding a space in our driveway that would work for our shadow science experiments. Shadows fall all over our driveway throughout the day, so I watched the sun for a few days to find a spot that would work.
We did our shadow tracings at 8:30 am, 10:30 am, 12:30 am, 2:30 pm, and 4:30 pm in the spring. And we would have done one last one at 6:30 pm if our house did not completely shadow our driveway, and our shadow science experiments, at that time.
You can see my daughter standing in her sundial at 6:30 pm in the bottom right photo in the photo collage below. She and our sundial are in the shade because our house had begun to eclipse the sun at that time.
I love our photographs because they not only document the changes in my daughter’s shadow throughout the course of a day in Northern California in the springtime of 2016 but the changes in my daughter’s wardrobe-ha! Those preschoolers are funny, aren’t they?
Related: Sorting and Classifying Rocks
Human Sundial Shadow Science Experiments for Kids
Help your children learn about the rotation of the earth by tracing shadows throughout the day with this human sundial shadow science experiment. Shadow science experiments are an easy hands-on way for children to learn about how shadows are created, and, measure the earth’s rotation.
My daughter was only 3 when we tried this for the first time. She was too young to do some of the steps such as recording her observations in a science notebook so I asked her questions and wrote down her responses. The questions I asked dovetailed off her responses and lead her to the conclusion that we (planet earth) are rotating to produce the changes in our shadows throughout the day.
Since that day we have continued to talk about how the earth rotates to make day and night. I have also begun to teach her how to tell time and what that means as it relates to the movement of the sun and the earth.
More Outdoor Science Activities
If you are looking for more outdoor science activities you may want to try shadow art, rock balancing, skipping stones, or rainbow rainy day art!
And if you have a budding naturalist at home you might want to check out our top 10 Nature Study Supplies.
This post is a part of the 31 Days of Outdoor STEM hosted by Little Bins for Little Hands. Be sure you head over there to see all of the other fun activities you can try!
For more ways to have fun with shadows click on the link.
Learn more about Rhythms of Play HERE.
More Science Ideas for Kids:
- Sorting and Classifying Rocks: Geology for Kids
- Rainbow Rainy Day Art: STEAM Activity
- Art & Science: Experiment with Watercolor Resist
- Fishing with Magnets: Cool Science for Kids
- Get Outside and Connect
- Birding for Kids: Bird-Watching Lessons and Activities
- How to Skip Rocks: The Art and Science of Skipping Stones
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