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12.Make a report about any scientist you find interesting. There are several famous scientists mentioned in the article.

Aristotle

Bishop Ussher

Thomas Malthus

Lamarck

Mendel

Erasmus Darwin

Charles Darwin

Alfred Russel Wallace

Choose one name , find some additional information and make a report, presenting the main ideas of this scientist.

13.Writing

Write an essay (150-250 words), giving the biography of the scientist, mentioned above, or another person, whose ideas you find interesting.

Unit 12

Тема урока: Ecosystems

текст 1 Ecosystem

текст 2 Human interference

текст 3 Coral reefs

текст 4 Экосистемы

Words

affect

v. to do something that produces an effect or change in something or in someone's situation

encompass

v. to include a wide range of ideas, subjects, etc

constituent

adj. being one of the parts of something

maintain

v. to keep something at the same level or rate

sustain

v. to make something continue to exist or happen for a period of time, to maintain

decompose

v. to make or become rotten, to decay

graze

v. to put (cattle, sheep, etc.) to feed on grassland

account

v. to give a satisfactory explanation of why something has happened or why you did something

consequently

adv. as a result

disrupt

v. to interrupt (an event, activity, or process) by causing a disturbance or problem

magnitude

n. the great size or importance of something

extend

v. to spread from a central point to cover a wider area

succession

n. a number of people or things of a similar kind following one after the other

barren

adj. (of land) too poor to produce much or any vegetation

Make sure you know these words

geosphere

biosphere

autotrophs

heterotroph

abiotic

Tertiary

oscillate

detritus

Working with words

1.Use prefixes and form the new words.

inter-, under-, in-, non-, re-, de-, over-, un-

relationship, lying, direct, act, living, arrange, compose, connect, lap, compose, like, turn, placement, stable

2.Define the following words.

1

to affect

a

2

to decompose

b

3

to store

c

4

succession

d

5

loss

e

6

chain

f

7

lipids

g

3.Choose the correct word to complete the sentences.

recent loss main without global warming plants surface whales

Krill feed on phytoplankton, microscopic, single-celled .................. that drift near the ocean’s ........................ and live off carbon dioxide and the sun’s rays. They in turn are the ...............................item in the diets of literally hundreds of different animals, from fish and birds, to .......................

Simply put, ....................... krill, most of the life forms in the Antarctic would disappear.

Alarmingly, there are .................. studies that show Antarctic krill stocks may have dropped by 80 percent since the 1970s. Scientists attribute these declines in part to ice cover loss caused by ............................ This ice ....................... removes a primary source of food for krill: ice-algae.

Working with word combinations and sentences

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