It's Dimensional Lesson Two
Duration
One class period
Objectives
The student will recognize and name common
three-dimensional shapes
The student will compare and contrast three-dimensional objects
The student will create three dimensional objects by using pay dough
Materials
play dough, wax paper, an item in the shape of each of
the geometric shapes listed in the vocabulary words
Vocabulary
prism cone
cube pyramid
cylinder sphere
box dimensional
Activities
Discuss the meaning of dimensional. Explain to the students that there are
more geometric shapes when objects are man-made because nature tends to be more
obscure in its geometry. Identify different shapes you have brought to the
classroom such as a ball, a pyramid, a box, etc. A two-dimensional object
is usually a representation of a three-dimensional object, even a flat piece of
paper has depth. Common representations include a circle is a
two-dimensional sphere, a square is a two-dimensional cube and a triangle is a
two-dimensional pyramid.
Show the students a sphere, a cube, a box. Discuss the difference and similarities between each. For example a sphere has no sharp points or flat surfaces, both the cube and the box do. The cube has six sides; the box can have four sides.
Illustrate how a circle, square, and a triangle can be made to look "three-dimensional" on paper. Showing the progressive steps in the drawing process of each object, helps the students to follow along and understand. Model creating a circle (flat) that can turn into a sphere , but can also be turned into a cylinder. It is important for students to understand that thickness is not enough for an object to be three-dimensional.
Instruct students they will be creating a three-dimensional object. Each student receives wax paper and play dough. Student will create several three- dimensional objects with the play dough. The objects created will be placed in a special area of the classroom for all students and visitors to enjoy.
Assessment
Evaluation will be based on participation, following directions, discussion, and
completion of dimensional figures.
Home Learning
After learning about two and three dimensional shapes the students write a list
of dimensional items they find in their house and outside in the backyard.
The items listed by the students will be discussed during class time.
Extension
Students can
visit Coolmath4Kids web site to engage in interactive geometry activities
at: http://coolmath4kids.com
Students can vie 3D Geometry at:
http://library.thinkquest.org/2842/
