strona` (4)

6.3 Getting around

Grammar

Past Simple: negative

describe your last holiday

People always need to answer the question ‘Where am I?’ when they travel. Ancient people used the stars to navigate. But of course this system of navigation didnt work during the day. In the twelfth century sailors invented the compass - this shows north, south, east and west, and it works at day or night. ln the eighteenth and nineteenth ccnturics there were many new inventions, including the sextant. This measured the position of the stars and sun and showed your approxlmate locatlon, but it didn t show your cxact location.

Everything changed in 1973 when the United States łaunched the 24 satellites of the Global Positioning System (GPS).

These go rumu ul tlifc* Fdrlli r*f a łit/ighf of

17,440 kilometres. Computers combine the signals from the GPS satellites with mops to show exactly where you are and how to get to another place.

to their meanings.
1	travel“^	a
2	navigate \	b
3	sailors	\ ^c
4	approximate	11 A
5	location	0
6	signal	G

f

Reading

1    Discuss.

1    What do maps show?

2    Are you good at using them?

3    When was the last time you used a map?

2    a Read the text quickly. Choose the best title. a What is GPS?

b How ancient people travelled c Navigation past and present

b Read the text again. Use the words in italics to label the pictures below.

3 a Find words 1-6 in the text and match them

people who work on a ship not exact

the place or position of something find your position or direction when you travel electronic communication between machines go from one place to another

b Use information from the text to complete the sentences.

Ancient people used the stars to navigate.

1    The system of navigating by the stars_

during the day.

2    There_many new inventions in the

eighteenth century.

3    The sextant_an exact location.

4    In 1973 everything_.