MODERN INVENTIONS

2. Our lives are easier thanks to inventions
The printing press was invented to make
many copies of books.

3. The beginning of the industry started when the
steam engine was invented to move big machines
Steam engine

4. Ancient Egyptians
used rollers and
wooden levers to
move stone blocks.
To build the pyramids,
They raised the stones
blocks with:
Inclined planes
Pulley systems

5. Inclined planes

6. Pulley systems

7. The wheel
The wheel is one of the most important inventions
in human history.

8. The wheel is a circular object
that rotates on an axis.
axis
We can use wheels to
move heavy objects with
little effort

9. The wheel changed transport and let us create
many other inventions.