# Science Projects for Kids: Weather and Seasons

Clock the Wind

Clock the Wind is a science project that teaches kids how to build their very own device to measure wind speed. How fast is the wind blowing today? Make a wind-speed gauge that will tell you.

### What You'll Need:

• Two hollow balls (rubber balls, tennis balls, or ping-pong balls)
• Nails
• Two sticks of the same length
• One-foot wooden 2 x 4
• Drill
• Wooden board for a base
• Wax or oil

### How to Make Clock the Wind

Step 1: Ask an adult to help you with this project. First, take two small, hollow balls and cut them in half. Nail the ball halves to the ends of two sticks with the cut sides facing outward as shown in the illustration. Paint one half ball a different color from the other three.

Step 2: Next, nail the two sticks together at right angles so they form an X. Make sure you join the two sticks at their exact centers, so the joined sticks will balance on the nail. Use a long nail so that the end of the nail comes through both sticks.

Step 3: Now make the base. Have an adult drill a hole in the end of a one-foot length of a wooden 2 x 4. The hole should be a bit larger than the nail that holds the two sticks together.

Step 4: Attach the 2 x 4 to a wooden base, and set the nail in the drilled hole. (Put a little wax or oil in the hole so the gauge will turn easily.)

Step 5: Now, put your wind-speed gauge in the wind. Count the number of times it turns around in 30 seconds. (Count by the painted half ball.) Write that number down and divide it by five. The answer is the wind speed in miles per hour.

Teach kids to make fog in a bottle with the Foggy Notions science project for kids. Read about it on the next page of science projects for kids: weather and seasons.