Measure the circumference of the same three pumpkins. Students can weigh and measure pumpkins at home, record the results and contribute to a group chart of pumpkin weights and measurements. Find the relationship between the size of a pumpkin and the number of ribs. Hollow out those two pumpkins and count the seeds of each. Predict how many seeds the middle-sized pumpkin will have.
Students can find out how close their predictions are.
Place an empty wastebasket in a dishpan. Fill the wastebasket to the rim with water. Place a pumpkin into the water. Measure the volume of water displaced. This will be the volume of the pumpkin.