Choose the correct word to complete the sentences

Use prefixes and form the new words.

Working with words

Make sure you know these words

Unit 12

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

Writing

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

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

Тема урока: Ecosystems текст 1 Ecosystem текст 2 Human interference текст 3 Coral reefs текст 4 Экосистемы

Words

1.	affect	v. to do something that produces an effect or change in something or in someone's situation
2.	encompass	v. to include a wide range of ideas, subjects, etc
3.	constituent	adj. being one of the parts of something
4.	maintain	v. to keep something at the same level or rate
5.	sustain	v. to make something continue to exist or happen for a period of time, to maintain
6.	decompose	v. to make or become rotten, to decay
7.	graze	v. to put (cattle, sheep, etc.) to feed on grassland
8.	account	v. to give a satisfactory explanation of why something has happened or why you did something
9.	consequently	adv. as a result
10.	disrupt	v. to interrupt (an event, activity, or process) by causing a disturbance or problem
11.	magnitude	n. the great size or importance of something
12.	extend	v. to spread from a central point to cover a wider area
13.	succession	n. a number of people or things of a similar kind following one after the other
14.	barren	adj. (of land) too poor to produce much or any vegetation

1.	geosphere
2.	biosphere
3.	autotrophs
4.	heterotroph
5.	abiotic
6.	Tertiary
7.	oscillate
8.	detritus

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.

	to affect	a
	to decompose	b
	to store	c
	succession	d
	loss	e
	chain	f
	lipids	g

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.

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