Objective

By the end of this lesson, you will be able to understand and apply arithmetic concepts while exploring the fascinating topic of hail storms.

Materials and Prep

• Pencil and paper
• Calculator (optional)
• Access to the internet or books with information about hail storms

Activities

1. Research Hail Storms

   Use the internet or books to gather information about hail storms. Learn about how hail forms, its size, and the damage it can cause. Take notes on interesting facts or statistics that you find.

2. Measure Hailstones

   Next time it hails, collect several hailstones and measure their diameters using a ruler or measuring tape. Record the measurements in a table, and calculate the average diameter of the hailstones.

3. Calculate Hailstone Volume

   Assuming that the hailstones are spherical, use the formula V = (4/3) * π * r^3 to calculate the volume of each hailstone. Round your answers to the nearest whole number. Sum up the volumes of all the hailstones you collected.

Talking Points

• Hail Formation: Hail forms when updrafts in thunderstorms carry raindrops upward into extremely cold areas of the atmosphere. These raindrops freeze and grow as they are carried up and down by the storm's winds.

• Hailstone Size: Hailstones can range in size from small pebbles to as large as grapefruits. The size of a hailstone depends on how many times it has been carried through the storm cloud, accumulating layers of ice.

• Measuring Hailstones: Use a ruler or measuring tape to measure the maximum diameter of each hailstone. Measure from one side to the other, passing through the center. This will give you an accurate measurement of the hailstone's size.

• Calculating Volume: To calculate the volume of a hailstone, you can use the formula V = (4/3) * Ï€ * r^3. The radius (r) is half the diameter of the hailstone. Plug in the radius value into the formula to find the volume.

• Average Diameter: To find the average diameter of the hailstones you collected, add up all the measurements and divide by the number of hailstones. This will give you a representative value for the size of the hailstones.