Surface area of spheres

Learning Objectives Identify a sphere shape in everyday objects. Describe 'surface area' as the 'skin' or 'outside' of a sphere. Estimate if a sphere has a larger or smaller surface area than another. Use counting to measure the 'surface area' of a sphere with stickers or stamps. Record their counting data using tally marks. Use their data to describe the chance of something happening. Have you ever tried to peel an orange in one piece? 🍊 That peel is its surface area! Today we will learn about the outside skin of ball shapes, called spheres! We will see how to guess and check how much skin a sphere has. It's a fun counting game! 🎉 Real-World Applications Guessing how many sprinkles are on a round donut 🍩 Counting the se...

TermDefinitionExample SphereA perfectly round shape, like a ball. 🔵A basketball, a marble, or a bubble are all spheres. Surface AreaThe total outside part of a shape. It is like its skin! ✨The red part of a cherry 🍒 or the peel of an orange 🍊. EstimateTo make a smart guess about a number. 🤔I estimate there are 10 cookies in the jar. DataThe numbers you get from counting or measuring. 📊We counted 5 red balls and 3 blue balls. That is our data! Tally MarksA quick way to keep count. You make one line for each one. I I I ITo count to 3, you would make three lines: I I I ChanceHow likely it is that something will happen. 🎲If there are more blue blocks than red blocks, you have a better chance of picking blue.

The Sticker Counting Rule Surface Area ≈ 🍓 + 🍓 + 🍓... We can measure surface area by counting how many stickers it takes to cover the whole sphere. The Bigger is More Rule Big 🏀 > Small ⚾ A bigger sphere will always need more stickers to cover its surface area than a smaller sphere. The Guess and Check Rule Guess 🤔 ➡️ Count 🔢 ➡️ Check ✔️ First, we make a smart guess. Then, we count to collect our data. Finally, we check how close our guess was!