Spheres
I.SectionObjectives
- Find the surface area of a sphere.
- Find the volume of a sphere.
II.ProblemSolvingActivity-MeasuringSpheres
- Bring in a bunch of different size balls.
- The students will need string, measuring tape, rulers, paper and pencils to complete this assignment.
- Students may complete this assignment in small groups.
- First, divide up the groups and have the students select one ball to work with.
- Using their tools, and any other given information on the ball, students need to figure out the surface area and
the volume of this first ball. - Then they select a ball that appears to be proportional to this first ball.
- Again, students are going to figure out the surface area and the volume for the second ball.
- Then students need to draw a diagram comparing the two and write about any conclusions that they can
determine about the two balls. - Allow time for students to share their work when finished.
III.MeetingObjectives
- Students will use tools to calculate the dimensions of a sphere.
- Students will find the surface area of a sphere.
- Students will find the volume of the sphere.
- Students will compare two different spheres.
- Students will draw a diagram explaining their work.
- Students will write about their conclusions.
- Students will explain and share their work with the class.
IV.NotesonAssessment
- Be sure that each step of the objectives is accurate.
- Listen for student understanding during the presentations.
- What conclusions did the students draw about the two balls?
Similar Solids
I.SectionObjectives
- Find the volumes of solids with bases of equal areas.
II.ProblemSolvingActivity-BuildingDimensions
- Here is the problem.
Chapter 5. Geometry TE - Problem Solving