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"saltpetre" - 5 õppematerjali

SCIENCE AND TECHNOLOGY
16
docx

SCIENCE AND TECHNOLOGY

It is just a short lifetime since humanity first travelled into space and discovered how fragile our planet looks. FROM FIREWORKS TO THE MOON At first glance you might think that there couldn't possibly be anything common between a 13 th century festival in China and the Apollo 11 moon landing in 1969. However, there is a link and that is that they both relied on the use of rockets. The Chinese first developed rockets by filling bamboo tubes with an explosive made from saltpetre, charcoal, and sulphur. The sealed tubes would be thrown onto fires during celebrations because it was thought that the loud explosions would protect them. It was not long before the ancient Chinese realised the military potential of these devices and primitive rockets were used to repel a Mongol invasion in 1232 AD. Word of these new amazing weapons quickly spread around the world and soon rockets were being used in military operations in North Africa and Europe

Keeled → Inglise keel
18 allalaadimist
Upstream intermediate b2 teacher s book
309
pdf

Upstream intermediate b2 teacher's book

5 rockets The Chinesefirst developedrocketsby filling bamboo @ to defeatan invading tubes with an explosivemade from saltpetre, charcoal' andsulphur.Thesealedtubeswouldbethrownontofires B in orderto invade becauseit wasthoughtthat the loud C againstthe North Afri F Ouringcelebrations l0 Europeans. wouldprotectthem.when thesetubeswerenot

Keeled → Inglise keel
239 allalaadimist
Inglise keele õpik
309
pdf

Inglise keele õpik

5 rockets The Chinesefirst developedrocketsby filling bamboo @ to defeatan invading tubes with an explosivemade from saltpetre, charcoal' andsulphur.Thesealedtubeswouldbethrownontofires B in orderto invade becauseit wasthoughtthat the loud C againstthe North Afri F Ouringcelebrations l0 Europeans. wouldprotectthem.when thesetubeswerenot

Keeled → Inglise keel
150 allalaadimist
Upstream Intermediate B2 - Teacher book
618
pdf

Upstream Intermediate B2 - Teacher book

5 rockets The Chinesefirst developedrocketsby filling bamboo @ to defeatan invading tubes with an explosivemade from saltpetre, charcoal' andsulphur.Thesealedtubeswouldbethrownontofires B in orderto invade becauseit wasthoughtthat the loud C againstthe North Afri F Ouringcelebrations l0 Europeans. wouldprotectthem.when thesetubeswerenot

Keeled → inglise teaduskeel
53 allalaadimist
Upstream B2 teacher
309
pdf

Upstream B2 teacher

5 rockets The Chinesefirst developedrocketsby filling bamboo @ to defeatan invading tubes with an explosivemade from saltpetre, charcoal' andsulphur.Thesealedtubeswouldbethrownontofires B in orderto invade becauseit wasthoughtthat the loud C againstthe North Afri F Ouringcelebrations l0 Europeans. wouldprotectthem.when thesetubeswerenot

Keeled → Inglise keel
23 allalaadimist


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