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First exam;
Exam science prep2
1.Question
A.choose the correct answer:
1.The degree of ozone at S.T.P condition equals .......................Dobson
a.100 b.200 c.300 d.400
2.Transition elements start to appear from the beginning of the .................period
a.Third b.Fourth c.Fifth d.Sixth
3…………….layer contains only limited amount of hydrogen&helium.
a.Troposghere b.Stratosghere c.Mesosghere d.Ionosghere
4……………….is an example of microfossils
a.Mammoth b.Fern c.Foraminifera d.Archaeopteryx
5.The boiling point of liquefied nitrogen equals……………………
a.196° b.100° c.20° d.-196°
6.All of the following are natural disasters that threaten living organisms except
………………..
a.floods b.volcanoes c.drought waves d.global waming
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B.what will happeb when…..?
1.Adding diluted HCL acid to a piece of carbon.
2.We go above the sea level.
3.An organism died and buied fast in medium that preserved it from
decomposition.
2.Question
A.write the scientific term of each the following
sentences:
1.A charged layer of atmosghere which reflects radio waves.
2.Fossils used in determination the age of sedimentary rocks.
3.Radioactive element used in food preservation.
4.An arrangement of mtals in a descending order according to their chemical
activity.
B.Mention one harm of each of the following:
1.Mixing animal and human wasts with water.
2.Extinction of one speciec or more from a balanced ecosystem.
3.Using rivers and seas water as a renwable source for cooling the nuclear
reactor.
4.Storing water in plastic bottles of miniral water.
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3.Question:
A.give reasons for:
1.The lower part of stratosghere is suitable for flying aeroplanes.
2.Desert environment is considered one of simple ecosystem.
3.element of the group have the sme properties
B.mention one example of each of the following:
1.One of endangered birds.
2.A polar compound.
3.An elemnt doesn’t react with water.
4.A device used to measure the atmosgheric pressure.
5.A halogen in a solid stat.
4.Question:
A.choose the odd word out:
1.Dodo bird / bald eagle / Quagga / mammoth .
B.mention one use of each the following:
1.Altimeter. 2.Silicon slides
C.put (right) or (wrong):
1.Ferns fossils indicate that the environment where they lived was clear ans warm
( )
2. All periods start with matals. ( )
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3.Aurora ghenomenon appears at both north pole & south pole of the earth
( )
4.Pure water has an acidic effect on limus paper. ( )
5.Infrared radiations have thermal effect. ( )
6.In hofmann s voltameter ,hydrogen gas is collected at anode. ( )
.ANWERS OF EXAM:
1.A.
1.c 2.b 3.c
4.c 5.d 6.d
.B.
1.No reaction takes place.
2.The atmosgheric pressure decreases.
3.A complete body fossil of it is formed.
2.A.
1.Ionosghere. 2.Index fossils.
3.Cobalt 60. 4.Chemical activity series.
.B.1.This leads to biological water pollution and the human is exposed to the
infection by many diseases such as : bilharzia , typhoid and hepatitis.
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2.It causes a cavity in the path of energy in the ecosystem that would disturb the
ecosystem equilibrium or destroy it .
3.This leads to thermal pollution of seas and rivers water and destroy the marine
creatures found in them .
4.Plastic reacts with chlorine gas (which is used as water disinfection) leading to
the increase in the infection rates by cancer .
.3.A.
1.Because in this part , the air motion is horizontally and neither clouds nor
weather turbulences exist .
2.Due to the rarity of alternation that compensates the absence of this species.
3.Because their atoms have the same number of electrons in the outermost
energy level.
.B.
1.Ibis bird. 2.Water molecule.
3.Cooper . 4.Barometer.
5.Iodine.
.4.A.
1.Bald eagle.
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.B.
1.It is used by pilots in aeroplanes to measure the elevation from sea level based
on atmosgheric pressure.
2.they are used in the manufacture of electronics such as computer.
.c.
1.Wrong
2.Wrong
3.Right
4.Wrong
5.Right
6.Wrong

Unformatted Attachment Preview

First exam; Exam science prep2 1.Question A.choose the correct answer: 1.The degree of ozone at S.T.P condition equals .......................Dobson a.100 b.200 c.300 d.400 2.Transition elements start to appear from the beginning of the .................period a.Third b.Fourth c.Fifth d.Sixth 3…………….layer contains only limited amount of hydrogen&helium. a.Troposghere b.Stratosghere c.Mesosghere d.Ionosghere 4……………….is an example of microfossils a.Mammoth b.Fern c.Foraminifera d.Archaeopteryx 5.The boiling point of liquefied nitrogen equals…………………… a.196° b.100° c.20° d.-196° 6.All of the following are natural disasters that threaten living organisms except ……………….. a.floods b.volcanoes c.drought waves d.global waming B.what will happeb when…..? 1.Adding diluted HCL acid to a piece of carbon. 2.We go above the sea level. 3.An organism died and buied fast in medium that preserved it from decomposition. 2.Question A.write the scientific term of each the following sentences: 1.A charged layer of atmosghere which reflects radio waves. 2.Fossils used in determination the age of sedimentary rocks. 3.Radioactive element used in food preservation. 4.An arrangement of mtals in a descending order according to their chemical activity. B.Mention one harm of each of the following: 1.Mixing animal and human wasts with water. 2.Extinction of one speciec or more from a balanced ecosystem. 3.Using rivers and seas water as a renwable source for cooling the nuclear reactor. 4.Storing water in plastic bottles of miniral water. 3.Question: A.give reasons for: 1.The lower part of stratosghere is suitable for flying aeroplanes. 2.Desert environment is considered one of simple ecosystem. 3.element of the group have the sme properties B.mention one example of each of the following: 1.One of endangered birds. 2.A polar compound. 3.An elemnt doesn’t react with water. 4.A device used to measure the atmosgheric pressure. 5.A halogen in a solid stat. 4.Question: A.choose the odd word out: 1.Dodo bird / bald eagle / Quagga / mammoth . B.mention one use of each the following: 1.Altimeter. 2.Silicon slides C.put (right) or (wrong): 1.Ferns fossils indicate that the environment where they lived was clear ans warm 2. All periods start with matals. ( ) ( ) 3.Aurora ghenomenon appears at both north pole & south pole of the earth ( ) 4.Pure water has an acidic effect on limus paper. ( ) 5.Infrared radiations have thermal effect. ( ) 6.In hofmann’s voltameter ,hydrogen gas is collected at anode. ( ) .ANWERS OF EXAM: 1.A. 1.c 2.b 3.c 4.c 5.d 6.d .B. 1.No reaction takes place. 2.The atmosgheric pressure decreases. 3.A complete body fossil of it is formed. 2.A. 1.Ionosghere. 2.Index fossils. 3.Cobalt 60. 4.Chemical activity series. .B.1.This leads to biological water pollution and the human is exposed to the infection by many diseases such as : bilharzia , typhoid and hepatitis. 2.It causes a cavity in the path of energy in the ecosystem that would disturb the ecosystem equilibrium or destroy it . 3.This leads to thermal pollution of seas and rivers water and destroy the marine creatures found in them . 4.Plastic reacts with chlorine gas (which is used as water disinfection) leading to the increase in the infection rates by cancer . .3.A. 1.Because in this part , the air motion is horizontally and neither clouds nor weather turbulences exist . 2.Due to the rarity of alternation that compensates the absence of this species. 3.Because their atoms have the same number of electrons in the outermost energy level. .B. 1.Ibis bird. 2.Water molecule. 3.Cooper . 4.Barometer. 5.Iodine. .4.A. 1.Bald eagle. .B. 1.It is used by pilots in aeroplanes to measure the elevation from sea level based on atmosgheric pressure. 2.they are used in the manufacture of electronics such as computer. .c. 1.Wrong 2.Wrong 3.Right 4.Wrong 5.Right 6.Wrong Name: Description: ...
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