Chemical properties Exam

                                       Second term examination

Part one: Reading and interpreting

Read the following text then do the activities below:

Matter can be described and identified by physical and chemical properties.Physical properties have to do with appearance. You can observe many physical properties with your senses and by measuring the length, width, height, mass and density of a substance. Physical properties include color, shape, smell, texture, taste and size. The state of matter (whether it's a solid, liquid, or gas) and the temperature at which the substance boils, melts or freezes are also physical properties. Magnetic properties are physical properties as well.

            Chemical properties, on the other hand, have more to do with the atomic or molecular composition of matter. Chemical properties deal with how substances react with other substances such as water, air or fire.

            A physical change has occurred when a substance changes color, size, shape, temperature or state. A chemical change has occurred when a substance has changed into something new or different so that the original substance is gone. Digestion and combustion are examples of chemical changes. A chemical change takes place in a battery to produce electricity when you turn on a flashlight.

                                                                               From: www.eslprintables.com

I-            Comprehension:

1-  The type of discourse is:  a- narrative/   b- expository / c- argumentative

2-  The text is:  a- a report/ b- a newspaper article/ c- a website article.

3-  Fill in the table with information in the text:

	Types	Examples	Change
Matter	…………	Length,  mass,  density	Colour, size,  shape,   temperature,  state
		…………
	Chemical  properties	…………	…………… ……………
		Substance reactions

4-  Say whether the following statements are true or false:

a-     Matter can be defined as physical, chemical and magnetic properties.

b-     A chemical property deals with a minute structure of matter.

c-     A physical alteration happens when a material changes into something new.

5-  Answer the following questions:

a-     Is the liquid, solid and gas state of matter a physical or chemical property?

b-     Is the change in color and/or temperature related to the physical properties of matter? Justify your answer from the text.

c-     What happens if we turn on a flashlight?

6-  Choose a best title: 1- the three states of matter/ 2- matter and physics/

1/2

                                           3- matter: properties and changes.

II-          Text exploration:

1-  Find in the text words or expression whose definitions are as follow: (1pt)

a-     A condition or a way of being that exists at a particular time.  (1§)

b-     The specific physical form or appearance of something.    (3§)

2-  Find the mistake and correct it:(1pt)

A-  I feel likes watch the new documentary.

B-  Whye doesn’t we go on picnic.

3-  Fill in the table as shown in the example:(1pt)

Verb	Noun	Adjective
To create	Creation	Creative
………………	…………………	Practical
………………	Benefit	………………

4-  Put the verbs between brackets into their correct form:  (2pts)

1-    He (to stop) smoking if the doctor (to find) a solution to his addiction?

2-    What (to take) place when a plant (to water)?

5-  Mark with a prime (  ) the stress of the following words:(1pt)

Policy,  submission,  dirty,  invent.

6-  Fill in the blanks with the following words: (2pts)vibrate, atoms,property, mobility. 

                In a liquid or a gas the ………. and/or molecules are relatively free and can move round at will. In solids, however, they are almost completely lacking mobility; all they can do is to ………… about a mean position when energy is added to the solid. This lack of ……………gives a solid its most characteristic ……………… - that of retaining whatever shape it is given.

Part two: written expression       (5pts)

          write a short paragraph about some advantages and drawbacks of technology advancement in our modern time.