1 The periodic table of the elements - Dmitri Mendeleev - 1869
This Russian chemist organised all of the chemical 1)
into groups based on their 2) and left spaces for new
elements to be discovered. This information is known as the periodic
table of the elements and is used all over the world.
2
The Big Bang Theory - Georges Lemaître - 1920s
A Belgian physicist and astronomer was the first to suggest that our
3) is expanding from a single point. His ideas became
known as the Big Bang Theory which is one theory for how the
universe was created.
3
DNA structure - James Watson & Francis Crick - 1953
s?
American scientist James Watson and British scientist Francis Crick
discovered that our 4) is not flat, but a 3D structure that
twists around in a double-5).​ .

ОТВЕТ
1)proper
2) elements
3)DNA
4)universe
5)helix

ukraine is one of the largest countries of eastern europe. it occupies an area of 603 700 km2. its territory stretches for 893 kilometres from north to south and for 1316 kilometres from east to west. it has state borders with russia, belarus and moldova. it also borders on poland, slovakia, hungary and romania.

in the south it is washed by the black and the azov seas. the major rivers are the dnieper, the dniester, the donets and others.

the major part of ukraine is flat and only 5% of it is mountainous. the two mountainous areas in ukraine are the carpathians and the crimean mountains.

the geographical position of ukraine is very favourable because the country lies on the crossroads of the ways from asia to europe.

ukraine has deposits of iron, manganese, coal, natural gas, oil and other mineral resources.

the main branches of industry are: coal and ore mining, iron and steel engineering, machine and ship building. besides, ukraine has always been an agrarian country. traditionally crop-growing and cattlebreeding are being developed.

the population of ukraine is about 50 million people. the biggest cities are kyiv, kharkiv, zaporizhia, dnipropetrovsk, odesa, lviv, mykolaiv and others.

ukraine has an ancient history. it has its own original culture and arts.

the country is one of the members of the united nations organization (uno) and participates in the work of many international organizations.