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Oxygen is the element with atomic number 8. Its name derives

from the Greek roots. At standard temperature and pressure,

two atoms of the element bind and form dioxygen, a very pale

blue, odorless, tasteless diatomic gas with the formula O2.

Because it comprises most of the mass in water, oxygen

comprises most of the mass of living organisms (for example,

about two-thirds of the human body's mass). All major classes

of structural molecules in living organisms, such as proteins,

carbohydrates, and fats, contain oxygen.

1. Oxygen is not element. T/F

2. Oxygen has smell. T/F

3. Livings contain oxygen. T/F

4. Oxygen is a Greek word. T/F

5. Oxygen constitutes more than T/F

half of the human body.

Translation Box

Answer the questions below.

1. What is the atomic number of oxygen?

2. What is in common between fats and proteins?

3. Give two adjectives describing oxygen.

4. Why does oxygen comprise most of the mass of living

organisms?

5. What are the major classes of structural molecules?

A. Before Reading Mark True(T) or False(F).

B. While Reading Translate the text into Turkish.

C. After Reading Comprehension.

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6. What does the word “odorless” mean? a. have no look b. have no smell c. have no size d. have no sense

7. At … temperatures and pressure, two atoms bind.

a. normal b. extraordinary c. official d. informal

8. All … classes of structural molecules … oxygen.

a. small/don’t have b. real/has c. main/have d. different/doesn’t have

9. The word, oxygen, … Greek roots.

a. looks like b. is similar to c. comes from d. finds out

10. What does the word “roots” mean?

a. cities b. people c. origins d. trees

A. Match the words with their synonyms. 1. root (n) 2. element (n) 3. form (v) 4. living (adj) 5. comprise (v)

a. having life, extant b. origin c. construct d. consist of e. component, constituent

B. Phrase Match. Do not refer to the text.

1. oxygen is the element 2. all major classes 3. its name derives 4. diatomic gas 5. at standard

a. temperature and pressure. b. with atomic number 8. c. from the greek.

d. with the formula o2. e. of structural molecules.

C. Label the words as “verb, noun, adjective, and adverb”

1. oxygen (adj)___________________ 2. atom 3. bind (noun)_________________ 4. form (noun)_________________ 5. structural (noun)_________________ 6. atomic 7. odorless (noun)_________________ 8. tasteless (noun)_________________ 9. two-third 10. about

D. Vocabulary Exercise

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Oxygen is the element with atomic

number 8. Its name (1)……….. from the

Greek roots. At standard temperature

and (2)……….., two atoms of the element

bind and form dioxygen, a very pale

blue, odorless, (3)………..diatomic gas

with the formula O2. Because it

comprises (4)………..of the mass in

water, oxygen comprises most of the

mass of living (5)………..(for example,

about two-thirds of the human body's

mass). All major (6)………..of structural

molecules in living organisms, such as

proteins, carbohydrates, and fats,

contain (7) ………...

Exercise 1: Fill in the gaps with a word from the list.

Exercise 2: Fill in the gaps with a word from the list.

E. While listening

tasteless

pressure

most

derives

classes

oxygen

organisms

Oxygen is the third most ()………… element in the universe and makes up nearly 21% of the earth's (2)…………. Oxygen accounts for nearly half of the mass of the earth's crust, two thirds of the (3)…………of the human body and nine tenths of the mass of water.

Oxygen is a (4)…………reactive element and is capable of combining with most other elements. It is required by most (5)…………organisms and for most forms of combustion. Oxygen is also combined with acetylene to (6)…………an extremely hot flame used for welding. Liquid oxygen, when combined with liquid hydrogen, (7)…………an excellent rocket fuel. Ozone (O3) forms a thin, protective layer around the earth that shields the (8)…………from the sun's ultraviolet radiation. Oxygen is also a (9)…………of hundreds of thousands of organic compounds.

component

abundant

atmosphere

surface

mass

highly

makes

produce

living