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II. Reconstruct the sentences below putting their fragments in order

  1. S.L. Miller / in 1953 / experimental simulation / The first / was carried out / by / deliberate /a U.S. graduate student / of the early Earth conditions.

  2. through a liquid / continuously sparked / methane / and hydrogen / was circulated / a corona discharge / water vapour / water solution / ammonia / A mixture of / and / by / elsewhere / in the apparatus.

  3. to sparking /After / of exposure / changed / the solution / several days / colour.

  4. amino and hydroxy acids / indicated that / intimately involved / simple procedure / in contemporary life / Subsequent analysis / had been produced / by this / several.

  5. particularly / quite remarkable / It is / biologically abundant / simulated /can be made / so readily / under / that amino acids / primitive conditions / amino acids.

  6. become oxidizing / are formed / for prebiological / however / no amino acids / laboratory conditions / suggesting / that / When / were necessary / reducing conditions / organic synthesis.

LISTENING COMPREHENSION

I. You will hear a text “Life from Outer Space?” Complete the notes below which summarize it. You will need to write a word or a short phrase in each space. Discuss the words from the box before listening

to gain popularity

entirely absurd

archaea

environmental tolerance

tentative evidence

to be blasted into space

to capture a meteor

crash into a planet

precursor of life

cognizant life

There is a hypothesis that life did not ___________ but emerged elsewhere _____________ and was then transported to our planet.

It is not senseless because the most primitive ______________ have extreme _______________ and some possibly could survive __________.

In _____ a team of NASA scientists announced that _____________ had been found in a 4.5-billion-year-old meteorite _____________.

Mars has much weaker ______________________.

The earth is more likely ________________ than __________.

We may all be ________________________.

It is possible that life __________________ on the earth and Mars.

To answer these questions scientists should:

  1. carry out experiments on ______________________;

  2. continue exploration for ___________________;

  3. search for a source ___________________ from outer space.

WRITING

Make a written summary of the text “Origin of Life” in 150 words using the active vocabulary of the lesson

Unit 1 Focus Words and Phrases

abundance, n (3)

adjust, v (2)

advance, n (1)

ancestor, n (3)

application, n (1)

appreciate, v (1)

appropriate, adj (3)

assembly, n (3)

boundary, n (1)

breakthrough, n (1)

catalyst, n (3)

cogent, adj (1)

conduct, v (1)

contribution, n (1)

conventional, adj (1)

crude, adj (3)

current, adj (1)

descendant, n (3)

diverse, adj (3)

eliminate, v (3)

encompass, v (1)

ensure, v (3)

entire, adj (2)

error, n (3)

essential, adj (2)

eventually, adv. (3)

evident (2)

fluid, adj (1)

focus, v (1)

fossils, n (3)

habitat, n (1)

hallmark, n (2)

imply, v (2)

initially, adv. (3)

interaction, n (1)

interrelated, adj (1)

neglect, n (1)

obtain, v (2)

occur, v (2)

origin, n (2)

perform, v (2)

property, n (2)

release, v (2)

relevant, adj (3)

rigorous, adj (2)

sample, n (2)

scarce, adj (3)

scope, n (1)

segregation, n (1, 3)

significance, n (2)

site, n (3)

span, v (1)

species, n (2)

subsequent, adj (3)

survive, v (2)

sustain, v (1)

template, n (3)

adapt/adjust to (2)

as a means of (1)

be capable of (3)

by means of (2)

in response to (3)

in the presence/absence of (3)

in turn (1)

serve as (3)

set something apart from something (2)

turn out (2)

under investigation (1)

Revision and Additional Practice 1