1. Young Thomas Edison By: Michael Dooling What is this?
Why does it happen?
How does it happen?

2. genius Thomas Edison was considered by many to be a genius.
An unusually talented or smart person
Thomas Edison was considered by many
to be a genius.

3. signal If the railroad crossing barrier is
A sound, motion, or other sign that sends a message
If the railroad crossing barrier is
down, it is a signal to stop.

4. electric My mom uses an electric knife to cut
Powered by electricity, a form of energy caused by the motion of electrons and protons
My mom uses an electric knife to cut
the turkey on Thanksgiving Day.

5. laboratory Many scientists invent new things in a laboratory.
A place where scientists work to do experiments
Many scientists invent new things in
a laboratory.

6. gadget A pencil sharpener is a handy gadget to have in the classroom.
A small, useful machine or device
A pencil sharpener is a handy gadget
to have in the classroom.

7. experiment Whenever you experiment, or test a
A test to learn how the forces of nature work
Whenever you experiment, or test a
new idea, you learn valuable information.

8. invention The invention of the steam engine in
Something new
The invention of the steam engine in
the 1800’s dramatically changed how people traveled.

9. occasional Before the Wright brothers were able
Happening from time to time
Before the Wright brothers were able
to fly successfully, they experienced occasional failures.

10. Vocabulary Words genius signal electric laboratory gadget experiment
invention
occasional