World Biomes

The lesson “Food Chains”, comes from a natural science course. Natural sciences, such as biology, deal with nature and the physical world. To get ready for the lesson on food chains, you need to understand certain terms.

Ecology lecture. “Food Chains.”

Today I’m going to discuss some concepts and terminology related to ecology, specifically, ecosystems and, the classifications of organisms that live there, and, the food chains and food webs within ecosystems.

OK, let’s start with the definition of system: a system is a group of  elements or parts that work together. In any system, those different parts rely, that is, they depend on each other.

Quantifiers

"Many and much" express a large quantity

Examples: (+)

I have many postcards.
She has got much influence on you.
There are many students in the class.
There is much orange juice in the glass.

Money – buying, selling and paying

A.      Personal finance

Sometimes in a shop they ask you: ‘How do you want to pay?’

You can answer: ‘Cash / By cheque / By credit card.’

In a bank you usually have a current account, which is one where you pay in your salary and then withdraw money to pay your everyday bills. The bank sends you a regular bank statement telling you how much is in your account. You may also have a savings account where you deposit any extra money that you have and only take money out when you want to spend it on something special. You usually try to avoid having an overdraft or you end up paying a lot of interest. If your account is overdrawn, you can be said to be in the red (as opposed to in the black or in credit).

Sometimes the bank may lend you money – this is called a bank loan. If the bank (or building society) lends you money to buy a house, that money is called a mortgage.

Quantifiers / Determiners

SOME & ANY : “Some and any” are determiners and they express an indefinite quantity or number. “Some and Any” are used when it is not easy, necessary or important to say exactly how many / how much we want to mean. They are both used with countable and uncountable nouns.


“Some” is often used in affirmative statements.

Passive voice

Passive Voice

Áóñäààð ¿éëäýãäýõ õýâ / Èäýâõèã¿é õýâ/

(to be + Past Participle )

Changing from Active into Passive        

Active	subject	verb	object
	Kim	baked	a cake.
Passive	subject	verb	agent
	A cake	was baked	by Kim.

Common English Suffixes and Prefixes

A prefix is a letter or a group of letters attached to the beginning of a word that partly indicates its meaning. For example, the word prefix itself begins with a prefix--pre-, which generally means "before."

Understanding the meanings of the common prefixes can help us deduce the meanings of new words that we encounter. But be careful: some prefixes (such as in-) have more than one meaning (in this example, "not" and "into").

The table below defines and illustrates 35 common prefixes.