It helped us find directions.
Compass
Because of the invention of the . . . , people could build tall buildings.
Elevator
People can look at very small objects using a . . .
Microscope
People can measure temperature with a . . .
Thermometer
A . . . will keep you safe while driving.
Seat Belt
It is a soft gray powder.
Cement
We use the . . . to make calls.
Telephone
It helps us to see in the dark.
Light Bulb
The telephone was invented by . . .
Alexander Graham Bell
The light bulb was invented by . . .
Thomas Alva Edison
The compass was invented by . . .
China's Han Dynasty
