For Grades 5 - 6:
The bacteria in the yogurt is not harmful; however, it is possible for other bacteria to grow on the agar plates. For that reason, make sure to follow all the safety guidelines in the Experimental Procedure. Be sure to dispose properly any plates with bacteria when the experiment is over.
NOTE: Adult help is required to light a candle. You can buy agar plates or make your own.
Have you ever wanted to build your very own robot from scratch? Bristlebots are a cheap, easy, and fun-to-build robot made from the head of a toothbrush, a battery, and a small motor. Once completed, they buzz along the top of a table like bugs. How can you make a bristlebot go faster? In this project, you will build bristlebots from two different types of toothbrushes, and race them against each other to find out.
NOTE: Adult supervision is required when cutting the head off of the toothbrush.
Some characteristics, like the shape of your hairline or whether your earlobes are attached or detached, are inherited from your parents. In this science project you will see how writing these characteristics onto a family tree can help you determine how they are inherited.
3... 2... 1... 0— blastoff! In this science project, you will use a bottle rocket launcher to launch your own bottle rocket. You will load it with water and pressurized air, make several launches, and find out what makes your rocket soar the highest.
You know that water and oil don't mix and you probably know that water is denser than oil so it goes to the bottom. But watch what happens when you add food coloring, which is water based. Then crumble in an alka-seltzer tablet, and see what makes the water move up and back down again!
There are many recipes out there for making your own ice cream at home, but did you know that you can make your own ice cream in five minutes using two Ziploc bags?