Hi everyone! Today I have a special treat for you. Adrianne from Kids Cog Works is guest posting, and sharing some great science activities that you can do on these sunny Spring days!
Black and WhiteMaterials:
Paint two rocks black and one white. Let dry. It is not necessary to paint the bottoms of the rocks.
Give students a mini lesson about the sun, introduce terms like:
Tell students that you are going to place one black rock and one white rock in the sun for an hour. Hand out Hypothesis Page (which you can download at the end of this post) and let students fill in their guess. Many students may know the answer that the black one will be hotter, but do they understand "why" it's hotter?
After the hour is up, have students touch the rocks with their hand and/or cheek (it's more sensitive to temperature). The black rock absorbed (took in) heat from the sun. The white rock didn't as much. Take the rocks back inside. Allow the rocks to return to room temperature again.
Discuss the students hypothesis with them. You may want to emphasize that it doesn't matter if you were right or wrong. Talk about why the black rock was hotter using the terminology you used in your mini lesson. You could talk about these points:
When would knowing this information be helpful?
Helps you choose clothing
Solar panels are black to attract more energy from the sun
Buy a color of a car
The next day, do the experiment again using only black rocks. Talk about what you could do to reflect some of the heat from the rock. Place the rocks in the sun. Cover one of the black rocks with a foil tent. Repeat with having students write their hypothesis. Leave rocks in the sun for an hour.
Check on rocks and compare findings with yesterdays. Is the black rock cooler with a reflector? Go over students hypothesis with them. Explore more with your students! Maybe you could try using thermometers wrapped inside black and white fabric and compare their temperatures. Try this on a sunny day and on a cloudy day, then compare temperatures.
There are so many more fun ways to do Sunny Science in the classroom! Be sure to download my freebie hypothesis sheet. Enjoy!
Adrianne Meldrum is the author of Kids Cog Works and creator of the game Brain Tower. She currently tutors struggling readers and middle school math students. Adrianne is the wife of a civil engineer and the mother of three handsome boys.