p.168, ex.1,2

Writing was probably the most revolutionary of all human ....

The 15th-17th centuries were the time of great geographic ...

Who .... the computer?

Australia .... ...... by James Cook.

...... is the scientific study of the Earth through its rocks and soil

...... is the science dealing with measurements, numbers and quantities

..... is the scientific planning of a machine, road, bridge

..... is the science study of animals

...... is the science of living things

..... is the science that deals with the nature of substances