topic 1 planet earth Flashcards
1
Q
State the names of the two most common elements in the Earth’s crust.
A
Silicon (1)
Oxygen (1)
2
Q
Which imaginary line defines zero longitude?
A
prime meridian
3
Q
Before the year 1884, there was no single defined zero of longitude.
Suggest why this caused problems for seafarers and other travellers.
A
With no ‘official’ longitude, navigators would
not know which map / chart to use (1)
…ship’s longitude would be unknown (1)
Leading to possible shipwreck etc. (1)
4
Q
On or around 21st June every year, the Sun is directly above an imaginary line on the Earth’s surface.
A
Tropic of Cancer
5
Q
Which imaginary line has a latitude of 23.5° north?
A
Tropic of Cancer
6
Q
A
