The Milky Way is the galaxy which is the home of our Solar System together with at least 200 billion other stars; though more recent estimates have given numbers around 400 billion-with own Sun being atypical specimen -and their planets, and thousands of clusters and nebulae, including almost all objects which are not galaxies on their own .

As a galaxy, the Milky Way is actually a giant, as its mass is probably between 750 billion and one trillion solar masses, and its diameter is about 100, 00 light years .It has three main components: a disk, in which the solar system resides , a central bulge at the core ,and an all encompassing halo. Radio astronomical investigations of the distribution of oxygen clouds have revealed that the Milky Way is a spiral galaxy. Therefore, our galaxy has both a spiral structure, and a prominent nuclear region.

Our solar system is situated within a smaller spiral arm, called the Orion Arm. Sometimes labeled “O”.This smaller intermediate arm connects the next inner arm and the next outer arm. The next inner arm, sometimes labeled -I, is called the Sagittarius Arm, the next outer arm, labeled +I, is the Peruses Arm. At least one even outer arm and two more inner arms have been identified.

A/ COMPREHENTION/ INTERPRETATION: (8pts)

Task One: Are these statements true, false or not mentioned? Write T, F or NM next to the sentence letter.

a. The Milky Way contains stars and planets.

b. This galaxy consists of more than three elements.

c. Sagittarius and Peruses Arms are sometimes called ;-I,+I.

Task Two: Answer the following questions according to the text.

a. Do the Milky Way and the solar system represent the same galaxy?

b. What are the components of the Milky Way?

c. What size is the Milky Way?

Task Three: What is the type of the text?

a. A scientific report b. A science fiction report c. A newspaper article.

Task Four: What do the underlined words in the text refer to?

a. .....which are not galaxies.......§1

b. ........its mass............................§2

Task Five: What do the connectors : both and therefore express in the text ?

“ Therefore, our galaxy has both a spiral structure, and a prominent nuclear region”

امتحان البكالوريا التجريبي (ماي 2008)

الشعبة :العلوم التجريبية والرياضيات و التسيير. الــــمدة: ساعتان و نصف

اختبار في مادة الانجليزية

PART ONE: Reading and interpreting (15 points)

Read the text carefully then do the activities.

Energy balance is the difference between calorie intake (from food & drinks) and calories out - through our metabolism & energy expended during daily activities.

Any change in body weight is the result of an imbalance between energy intake and expenditure. People gain weight gradually because most days they're in a state of positive energy balance (more calories in than body requires) and any excess is stored until the individual eventually realizes they've gained a few pounds.

In order to lose fat weight, our body needs to be in a negative energy balance. Sounds simple but this doesn't mean a negative energy balance for a few days, here and there it must be a consistent, gradual process. Imagine body fat stores as thousands of little dots all over a piece of paper only one dot at a time can be erased.

Weight loss confusion occurs because there's a physiological adaptation to under eating in order to balance energy within the body and help maintain weight quickly. Weight needs to be balanced quickly because if our ancestors couldn't find food for several days they would simply waste away, instead we can go for months without food! Even overeating causes an adaptive response so in order to gain further weight; more excess energy must be consumed. Although energy balance helped our ancestors survive in times of starvation, it now causes frustration for the dieter attempting to lose weight. Some cut enough calories to lose a pound of fat but when only a small amount is lost they often believe it’s because they're meant to be that way.

A/ COMPREHENTION/ INTERPRETATION: (8pts)

Task One: The text is:

(a) an expository (b) a narrative (c) an argumentative text

Task Two: Choose the most suitable title for the reading passage.

a. Energy Balance and Weight Control.

b. Energy Balance and Weight Loss.

c. Energy Balance and Weight Calories.

Task Three: Answer the following questions according to the text.

a. What is result of an imbalance between energy intake and expenditure ?

b. Why does our body need to be in a negative energy balance?

c. Why must more excess energy be consumed?

d. Who is the dieter that is frustrated from emery balance?

Task Four: What do the underlined words in the text refer to? they (4§) it (4§)

Task Five: Find in the text words or phrases that are opposite in meaning to the followings:

a. difficult (3§)≠ …. b. understanding (4§)≠ ……

c. destroy (4§)≠…. d. satisfaction (2§)≠ …….

اقـلب الصــفـــحــة

الصفحة 1/2

B/ TEXT EXPLORATION:

(7pts)

Task One: Divide the words into affixes and roots:

Astronomical - unknown - investigation - impossibility.

Prefix

Root

suffix

Task Two: Join the sentences using the connectors between brackets. Make any necessary change.

1. My son always eats healthy food. He is always ill. (although)

2. Many children in Africa suffer from malnutrition. They lack food. (owing to)

Task Three: Rewrite sentence (b) so that it means the same as sentence (a).

1/ a. If our ancestors couldn't find food for several days they would simply waste away.

b. If food……………………………………………………………..

2/ a. More excess energy must be consumed by people.

b. People ………………………………………………………………….

3/ a. Europeans eat much healthy food than Africans.

b. Africans ……………………………………………………………………

Task Four: Classify these words according to the pronunciation of their final ED.

hated - blocked - listened - pronounced

/d/

/id/

/s/

Part Two: Writing. (5pts)

Choose one of the following topics.

Topic1: Safety food has become one of the major concern for mankind. How can a person take care of his safety food?

Use the following notes :

- Eat more organic food.

- Prepare one’s own food.

- Eat food with fewer additives if necessary.

- Not to be influenced by advertisements.

- Pay attention to where and how food is made.

- Have a look to the expiry date…..etc.

Topic 2: Advertising is more likely to harm consumers that serve them. What do you think of that? Write an argumentative essay using the suitable arguments.

بالــتـــوفــيــق

الصفحة 2/2

انتهى

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