Second Term English Exam: Part One: Reading (15 PTS.)

Bouazza Djamila Secondary School -El Affroun- Academic Year: 2019 2020
Teacher in charge: Ms .Yahi Level: Second Year (SC / TM)
Second Term English Exam

Part one: Reading (15 pts.)
Read the text below carefully, then do the activities that follow.
Why does an object seem to weigh less underwater than above the surface? How is it
that a ship made of steel, which is obviously heavier than water, can float? These and other
questions are addressed by the principle of buoyancy.
In the third century B.C, the Greek physicist “Archimedes” discovered the principle of
buoyancy. His principle states that when an object is placed in water, there are two primary
forces acting on it. The force of gravity yields a downward force, and the force of buoyancy
yields an upward force. The gravitational force is determined by the object's weight, and the
buoyancy force is determined by the weight of the water displaced by the object. If the
gravitational force is less than the buoyancy force, then the object floats; otherwise, it sinks.
You might be tempted to say whether an object floats depends on how heavy it is. Well
think about ships, they can weigh thousands of tons, but still float. That is because floating
or sinking is not determined by the object’s weight, but by something called “density».
Therefore, a ship floats on the water’s surface because its density is less than the water’s
density.
Adapted from: www.readworks.com
A) Comprehension (08 pts)

1- Choose the correct answer. The text above is (01 pt.)
a) a website article b) a magazine article c) a Survey report
2- Are the following statements true or false? (02 pts.)
a) The Greek physicist Archytas discovered the principle of buoyancy.
b) When an object is placed in water, there is one primary force acting on it.
c) The buoyancy force is determined by the object's weight.
d) If the gravitational force is less than the buoyancy force, then the object floats.
3- Answer the following questions according to the text. (03.5 pts.)
a) What are the forces acting on an object when it is placed in water?
b) Do you think that the object’s weight is the thing that determines floating or sinking?
Justify.
c) Why does a ship float on the water’s surface?
4-what/who do the underlined words refer to in the text? (01.5)

Which (§) 1……………………………. His (§) 2…………………………… it (§)
3……………………………
B/ Text Exploration (07 pts.)

1-match words with their corresponding definitions. (02 pts.)
Words definitions
a) buoyancy 1) The degree to which molecules of a substance are tightly packed together.
b) density 2) The ability of an object to float when it is placed in water.
c) gravity 3) a general scientific theory or law.
principle 4) a natural force that causes the objects to fall towards the Centre of the
earth
2-Complete the following table as shown in the example. (01 pt.)
verbs adjectives nouns

to thicken thick thickness
to widen ……………………… ……………………
…………………………. deep ……………………..
3- Give the correct form of the verbs in brackets. (02 pts.)
1-when the object’s density (to be) less than the water’s density, then the object (to float).
2-Objects (to sink) when the gravitational force and the buoyancy force (to be not) equal.
4- Mark the right intonation (➚) or (➘) in the following sentences. (01pt)
A-If you drop a candle on a glass of water, it floats.
B- If you heat ice, does it melt?
5- Fill in the gaps with the right word from the list below. (01 pt.)
(molecules - density - sink - float)
water and alcohol do not have the same………………….... water is more dense than alcohol,
because its……………………..are tightly packed together than the molecules of alcohol. That is
why a candle………………….... in water, but……………………… in alcohol.
Part Two: Written Expression. (05 pts.)

Choose one of the following topics.
Topic one: the picture below represents an experiment that proves a scientific fact, using
the following notes, write a short composition explaining why does the egg float on salt
water and sink on fresh water?
 Liquids/differ/density.
 Salt water/ more dense/tight/ molecules/egg float.
 Fresh water/less dense/loose/molecules/egg sink.
Topic two: Great minds tend to change the whole world with just one invention . Write a
short composition about an invention/discovery you think it has had the most impact on
human society.
I believe in you, I trust in you, you are important and listened to.

Second Term English Exam: Part One: Reading (15 PTS.)

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Second Term English Exam: Part One: Reading (15 PTS.)

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Bouazza Djamila Secondary School -El Affroun- Academic Year: 2019 2020

Teacher in charge: Ms .Yahi Level: Second Year (SC / TM)

Second Term English Exam

Adapted from: www.readworks.com

A) Comprehension (08 pts)

a) a website article b) a magazine article c) a Survey report

2- Are the following statements true or false? (02 pts.)

a) The Greek physicist Archytas discovered the principle of buoyancy.

c) The buoyancy force is determined by the object's weight.

3- Answer the following questions according to the text. (03.5 pts.)

a) What are the forces acting on an object when it is placed in water?

c) Why does a ship float on the water’s surface?

4-what/who do the underlined words refer to in the text? (01.5)

B/ Text Exploration (07 pts.)

2-Complete the following table as shown in the example. (01 pt.)

verbs adjectives nouns

3- Give the correct form of the verbs in brackets. (02 pts.)

A-If you drop a candle on a glass of water, it floats.

B- If you heat ice, does it melt?

(molecules - density - sink - float)

Part Two: Written Expression. (05 pts.)

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