WEDGE: An object with at least one slanting side ending in a sharp edge. It can cut or spread an object apart.

 

Objectives:

Student will be able to:  identify a wedge as an object with at least one slanting side ending in a sharp edge, make a wedge and explore how it is used to make work easier.

Materials:

• Science Journal
• 2 wood blocks
• 1 fat wedge
• 1 skinny wedge
• 1 ruler

Procedure:
 

• Put the blocks side by side on your desk. Use your ruler to measure how long the two blocks are.

• Record the length in your journal. Remember to write the units.

• Place the skinny wedge where the blocks meet and push down. Now measure and record the length of the blocks.

• Put the two blocks back together and repeat step 3 using the fat wedge. Measure and record the length of the blocks.

Consider these questions and write your answers in your journal:

• When you pushed down on the wedge, which way did the blocks move?

• How does the thickness of the wedge affect the movement of the blocks?