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Lesson 03 – Wedges At Work

Read About Wedges At Work


Read the vocabulary terms to understand the reading better.


An axe is a tool used for chopping that has a blade on one end of a handle.


A doorstop is a tool that wedges under a door to stop it from moving.

Simple Machines

Simple machines make work easier and have few or no moving parts.


A wedge is a simple machine that can push things apart by getting in between them. A saw is an example of a wedge. A wedge can also hold things together. A nail or doorstop are examples of a wedge that holds things together.

Wedges At Work

Wedges are simple machines. They make work easier.

Wedges can do different things.

An axe is used to split wood.

The blade of a knife is a wedge.
It is used to cut food.

A doorstop is a wedge. You slip it under
a door to stop it from closing.

Now Show What You Know!

Complete some questions about the reading selection by clicking “Begin Questions” below.