Final revision Science for perp1 second Term

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1) Correct the underlined words:

1.Salts are substances dissociated in water producing negative hydroxide ions.

2.Motion is divided into two types which are circular motion and transitional motion.

3- Marble is resulted from transformation of sandstone.

5-Inner core is a layer of molten metals with a thickness 2100 km.

6.Simple pendulum motion is a transitional motion.

7.Acid dissolves in water to produce negative hydroxide ion.

8.Water molecule consists of four atoms for two elements.

9-Nitrogen gas represents 21% of air volume.

10- Due to friction in machines, light energy is produced.

11-Plutonic rocks contain small circular holes.

12-The common name of sodium chloride is caustic soda.

13-The Earth occupies the third order regarding volume.

14-The bond in oxygen molecule is ionic bond.

15-Earth completes one revolution around the Sun every 24 hours.

16-The outer core layer lies beneath the Earth crust.

17-Kilogram is the measuring unit of weight.

18-The metallic atom that lost an electron or more is called the negative ion

  1. Caustic soda is called potassium hydroxide.
  2. Car brakes are from applications of inertia.

21-. Marble is one of sedimentary rocks.

22.Calcium carbonate salt contains five atoms of two elements.

23.The number of electrons in oxygen ion (O-2) is 8 electrons.

24.The car brake performance is an application of force of inertia.

25.Marble consists of olivine,feldspar and pyroxene.

26-. Green plants use oxygen gas in the process of photosynthesis.

  1. The pulse inside the blood vessels is from the forces of inertia.

28-.The bond in the magnesium oxide molecule is single covalent bond

29.The major component of atmosphere is oxygen gas.

30-. The Earth is the fourth planet according to the distance from the Sun.

  1. Granite is a sedimentary rock.

32.Inner core of the Earth is rich in iron and aluminium.

  1. The Earth is located in the fifth arrangement from the Sun.3.Hydrogen gas is used by plants to form proteins.

34.Friction causes great loss of chemical energy.

35.Green plants use oxygen gas in photosynthesis process.

4.Ozone layer protects the living organisms from the harmful infrared rays.

5.The outer layer of the Earth is known as the mantle.

  1. Simple pendulum motion is a transitional motion.

1.Negative ions have number of energy levels less than that in their atoms.

2.The motion of simple pendulum is circular motion.

3.Oxygen gas enters in formation of protein.

4.The water of oceans is fresh water.

2)Write the scientific term:

1.Breaking down the bonds between atoms of reactant molecules and formation of new bonds of products molecules.

2.Compounds are dissociated  in water producing (OH) ions.

  1. Compounds dissolve in water producing positive hydrogen ions.

4.Wave which need a medium to transfer through.

5.Magma,when it reaches the Earth’s surface.

6.The number of electrons gained, lost or even shared by an atomduring a chemical reaction.

7.A hot thick liquid underneath the Earth’s crust.

8.The only nonmetal that exists in a liquid state.

9.The effect that attempts to change the object’s state from being static to motion or vice versa or attempts to change the motion direction.

  1. A gas that is used by green plants in photosynthesis.

11.A rock formed of lava flows when it comes on the Earth’s surface.

12.The motion which is regularly repeated in equal periods of time.

13.The Earth’s attraction force to an object.

14.Changing the object’s position as time passes from its initial position of final one.

15.Type of chemical bond arises between hydrogen atom and chlorine atom.

16.An instrument used to change the electric energy to magnetic energy.

17.An instrument used to change the K.E energy to electric energy.

  1. The bond that is formed between metals and nonmetals.

19.Rocks are formed from magma or lava after cooling.

20.Elements having 1 or 2 or 3 electrons in the outermost energy level.

21.A gas represents 78% of the Earth atmosphere.

22.An atom of metallic element that lost one or more electrons during a chemical reaction .of minerals.

23.The force which helps in burning match.

24.A layer of molten metals with a thickness 2100 km.

25.Rocks that are formed when old rocks are subjected to pressure and high temperature.

26-The ability of the Earth to attract an object to its centre.

27-.The layer that protects living organisms from harmful ultraviolet rays(UV)

28-.Waves that don’t need a medium to travel.

29.Magma when it reaches the Earth’s surface.

30.They are resistant forces originated between the object in motion and the medium touching.

31-A very hot viscous liquid which exist underneath the Earth crust.

32-The distance covered by light in one year.

33- An atom of a non-metallic element that gain an electron or more during the chemical reaction.

34-Compounds change the colour of litmus from red into blue.

35-A set of atoms joined together, behave like one atom only,having a certain valency and it can’t be existed solely.

36-The change in an object’s position as time passes relative to another object

37-A rock resulting from the conversion of limestone.

38-Property of an object has to resist the change of its state unless an external force acted on it.

The answers:

[1- chemical reaction 2-base 3-Acids 4- mechanical wave 5- Lava 6-valence –7-magma 8- Bromine 9-Force 10- CO2 11– Basalt 12- Periodic motion 13-weight 14-–Transitional motion 15-covalent bond 16-electromagnet 17-electric generator -18-covalen bond  19- igneous rocks 20-metals 21-nitrogen 22-positive ion 23-friction 24-outer core 25-metamorphic rocks 26-

26-weight 27-ozone 28-mechanical wave 29-lava 30-friction force 31-magma 32-light year 33-negative ion 34-bases 35-atomic group 36-relative motion 37-marble]

3)Give one word for each of the following statements:

1.Compounds produced as a result of combination of a positive metal ion with negative nonmetal ion.

  1. It is an effect attempt to change the object’s phase from static to motion or vice ver change the direction.

3.The measuring unit of the weight.

4.Substances that have less than (4) electrons in their outermost energy levels.

The answers:{1-ionic compound 2- force –3- Newton 4-Metals]


4)Mention an example for:

1.Nonmetal liquid element.               

2.Electromagnetic wave.

  1. Rock produced from conversion of limestone.

4.Trivalent atomic group.

5.Transitional motion.

6.Source of salty water.                        

7.Igneous rocks.

8.Insoluble salt.                       

  1. Volcanic rocks.

10-Plutonic Rocks                   

11.Sedimentary rocks.

12.An inert gas.

13.Surface igneous rock (volcanic).

14-salt doesn’t dissolve in water

15-A nonmetal that has more than one valency.

16.A biological force.

17-Gas reduces the effect of oxygen during the burning processes.

The answers:

[1- bromin 2-light 3-marble 4-phosphate 5-Tarin 6-Sea 7-Basalt -8-AgCl 9-Basalt 10-garnite 11-Limestone 12-He Or Ar 13-Basalt 14-AgCl 15-P or,S , N 16-blood impluses 17-Nitrogen]


5)Choose the odd word out of the following:


2.Radio waves-Microwaves-Sound waves-X-rays.


4.Earht’s crust-Atmosphere-Mantle-Core.

5.Light waves-Sound waves-Water waves.


7.Earth’s crust-Atmosphere-Mantle-Core.



10- Chlorine/ Potassium/Copper/Sodium.

11-Gravitational force/Biological force/Electromagnetic force/Nuclear force.

12-Inertia-Friction-Attraction force-Biological force.



15-Sound waves-Ultraviolet waves-Infrared rays-Visible light.



18-Corrosion of machine parts-Generating heat-Liquids transferring-Loss of part of mechanical energy.


20.Person’s motion-Train motion-Fan motion-A bicycle motion.


22-Earth’s core-Mantle-Ozone-Earth’s crust.


24-.Light waves-Sound waves-Radio waves-Microwaves.





6)Write the number that indicates each of the following:

1.Atoms in aluminum sulphate molecule.

2.The normal atmospheric pressure on Earth.

3.The number of well known elements till now.

4.The thickness of the mantle layer.

7)Put () or (x) in front of the following statements:

  1. Some elements have more than one valency such as nitrogen (N).

2.Earth’s radius between the two poles in smaller than that at the equator.

  1. Marble is igneous rocks.

4.Ozone layer protects living organisms from the harmful infrared rays.

5.The valency of nobel gases is zero.

6.The force is measured in newton.

  1. Acids change litmus paper into blue.(
  2. The Earth’s inner core is rich in iron and aluminium.(

9.Water molecule consists of four atoms for two elements.

10-. The Eath’s radius between the two poles is larger than that at the equator.

11.MgO is an example of metal oxide.

12.The chemical bond in sodium chloride is ionic bond.

13.Simple pendulum motion is a wave motion.

14.The nomal atmospheric pressure is 71 cm.Hg.

15.The bond in potassium chloride molecule is ionic bond.

16.Pulses inside blood vessels is from fundamental forces in nature.

  1. Water masses on Earth’s surface forms about 30%.(

18.Mass is an attraction amount of Earth to a body.

19.Mercury is the only liquid metal.

20.The periodic motion is the change of object’s position or direction as time passes relative to another object.

21.Water masses on Earth’s surface forms about 30%.      (  )

22.Mass is an attraction amount of Earth to a body.        (  )

23.Mercury is the only liquid metal.                    (   )

24.The periodic motion is the change of object’s position or direction as time passes relative to another object.                  (  )

What happens if…?

1.An atom gains one electron or more.  It changes into negative ion  
2. There is no atmosphere. There is no life on earth

3.Approaching a wet rod with conc.hydrochloric acid to ammonia gas.:

-It produces white clouds of NH4Cl

NH3+ HCl >>> NH4Cl

4-What happen to the force of inertia when we use safety belts in the car?

-we Avoid the dangerous of inertia

5-What happens when decreasing the temperature of magma in the depths off Earth’s crust slowly?

  • It forms plutonic rocks with large crystals

6-What will happen when burn a piece of magnesium ribbon (Showing with equation)?

-it produces white powder of MGO

2Mg+O2 >>> 2MGo

7-What happen when an atom loses one electron or more?

-It changes into positive ion

Give reasons for:

1.Chemical equation should be balanced.

-To achieve the law of conversation of matter

2.Policemen advise drivers to use safety belts in cars and planes.

-To avoid the danger of inertia

3.Object’s weight changes from one place to another on the Earth’s surface.

-due to the change in distance between the object and the center of earth

4.Astronauts can’t hear each other voices directly in space.

-because sound is mechanical wave not travels in space

  1. Potassium 19K is monovalent.

-because it loses one elctron in chemical reactions

2.Car passengers are rushed forward ,when the car stopped suddenly.

-Due to inertia force that resists the change in state of the object

  1. Temperature on the Earth’s surface suits the life of living organisms.

-due to the presence of hydrosphere

2.Acids solutions change blue litmus paper into red.

-due to the presence of  H+ in its solution

3-Give a reason for : lubricating and oiling machines decrease the effect of friction

4-Give reason for :we receive the sunlight and we don’t hear the sound of solar explosions at the same time.

-because sunlight is electromagnetic wave can travel in space while the sound is mechanical cant travel in space

Give reasons for:we see the lightning then we hear the thunder.

-because lightining is electromagnetic wave more faster than sound(mechanical wave)

Write the chemical formula of:

1.Calcium hydroxide.:       Ca(OH)2             

2.Magnesium oxide.        MgO            

3.Sodium carbonate.       Na2CO3             

4.Calcium hydroxide.       Ca(OH)2           

  1. Sulphuric acid.  H2SO4
  2. Silver nitrate. AgNO3

7.Sodium hydroxide        NaOH

8.Aluminium oxide.        Al2O3

9.Silver Chloride           AgCl

1-What’s the importance of …?

1.Gravity. : steadfastness of atmosphere and hydrosphere on  earth surface

2.Give one importance of ozone layer.: Protect the earth from ultraviolet rays

3.Nitrogen gas.: plant used it to make protein – reduce the burning of oxygen gas


3-Choose the correct answer:

1.The metamorphic rocks are produced as a result of the effect of  on rocks.

  1. high temperature b. high pressure  c. (a) and (b) correct answer
  2. The car brake performance is an application of

a.gravitations force.b. friction force. c.centrifuge forces. d.forces of inertia.

3.The valency of magnesium (12Mg) is..

a.divalent.  b. trivalent.  c.monovalent. correct answer.

4.All of these elements can participate in chemical reactions,except

  1. sodium (11Na) b. nitrogen (7N) c. hydrogen(,H)  d.neon(10Ne)

5.All of non metals don’t conduct electricity.expect

a.bromine.   b.aluminium.  c.graphite.   d.mercury.

6.Water bodies on the Earth’s surface form the percentage of

        a.50%   b.71%    c.40%     d.30%

  1. —–is a force found in the living system.

a.Inertia    b.Braken  c.Pulse in blood vessels  d.Centrifugal

8.Limestone is a type of  …. rocks.

a.sedimentary   b.igneous   c.metamorphic correct answer

9.Layer consists of molten metals is the

a.crust.    b.mantel.    c.outer core.     d.inner core.

10-.Car brakes are one of the applications on ……..force.

a.friction    b.inertia       c.nuclear       d.gravitational

11-.From the sedimentary rocks

  1. basalt. b. granite. c.sandstone.      d.mica.

12-.All of the following are metallic oxides,except…

a.Na2O        b.MgO          c.SO3        d.Al2O3

  1. The layer which consits of molten metals is the

    a.crust.   b.outer core.       c.mantle. d.inner core.

  1. The idea of machine lubrication depends on the decreasing of the

   a.object weight.   b. inertia. c.friction forces.    d.gravity.

15.Electromagnetic forces affect on the performance of the following,except for

  1. dynamo (generator).   b.electric motor.

   c.electromagnet. d. car internal combustion engine.

16.The inertia force affects the bodies.

  a.moving     b.static    c.moving and static  d. no correct answer


17.The car brake performance is an application of

a.attraction forces. b.friction forces.  c.inertia forces. d.centrifugal forces.

18.All the following are metals,except

a.iron.   b.oxygen.    c.copper.    d.sodium. a pink or grey coloured rock.

a.Basalt    b. Granite    c.Sandstone           d.Limestone

20.All the following are examples of periodic motion,except     b.bicycle.    c.pendulum. d.wave

21.Water masses on the Earth’s surface from about

a.30%     b.50%      c.71%    d.90%


Write down the electronic configuration of the atoms then indicate the type of each atom(metal-nonmetal-nobel gas):

1.Mg12          2.Ar18          3.08           


Two elements (X & Y) have atomic number (11 & 17 respectively).

First:1. Show by drawing how the chemical bond is formed between them.

  1. What is the type of this bond?


1-Find the weight of an object,its mass is 50 kg,if the Earth’s gravity acceleration is 9.8m/sec2.

2-Calculate the total mass of reactants and products knowning that the mass of

3-Calculate the masses of the reactants and products in the following reaction.


knowing that:(C=12,0=16)

2-Calculate the mass of an object its weight is 460 newton, knowing that the Earth’s gravitational acceleration is 10 m/sec2.

6-Calculate the mass of an object if its weight is 50 Newton (knowing that the Earth’s gravity is 10 m/s2).

Complete the following sentences:

1.The motion of simple pendulum is.. ….,while the motion of a toy car is

2.Ozone layer protects living organisms from the harmful………..rays.

3.Compounds can be elassified according to their properties into acids,. ……..,and…………..

4.The motion of simple pendulum is …..while the motion of a toy car is

5.Ozone layer protects living organisms from the harmful.rays.

6.The waves causing motion are divided into two types which are………….and

7.Compounds can be classified according to their properties into acids,…………..,and..

8.A object’s  …. changes from a place to another on Earth’s surface, whereas its ….. remains fixed.

  1. The valency of (18Ar)is,while that of (CO3) is.

10-.Electromagnet is used to make………….and.

11.According to the law of conservation of mass,the sum of ……masses equal the sum of…………..masses in chemical reaction.

12.Acids change the colour of litmus paper into…….while bases change the co of litmus paper into ……

13.The car passengers are rushed ……  when the car stops suddenly by the effect …..force.

  1. The bond in oxygen molecule is………….bond,while the bond in nitrogen mole is…………….bond.

15.Granite is from…………igneous rocks, while basalt is from…  igneous rock


Mention the number that indicates the following statement:

  1. Number of electrons in (19K)ion.

2.The thickness of mantle layer ofEarth. 

 3.The percentage of N2 gas in air.

In the reaction of ammonia gas with conc, hydrochloric acid:

1.Write the equation.:NH3+Hcl  >>>  NH4Cl

2.Mention the type of the reaction.:      compound with compound

3.Mention the type of produced compound. :     Salt

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Final revision prep1 secondTERm2024


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