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Science Final Exam

Total questions: 150

Worksheet time: 13hrs 30mins

Name
Class
Date
1.

Match the following

4 lines
2.

Convert 10 m s-1into km h-1.

4 lines
3.

Distinguish between velocity and acceleration.

4 lines
4.

Distinguish between mass and weight.

4 lines
5.

Distinguish between G and g.

4 lines
6.

State the universal law of gravitation

4 lines
7.

A battery lights a bulb. Describe the energy changes involved in the process.

4 lines
8.

What is the importance of universal law of gravitation?

4 lines
9.

What is the acceleration of free fall?

4 lines
10.

In what direction does the buoyant force on an object immersed in a liquid act?

4 lines
11.

What do you mean by free fall?

4 lines
12.

When do we say that work is done?

4 lines
13.

What is power?

4 lines
14.

Why should prevention measures and biological control methods be preferred for protecting crops?

4 lines
15.

Why are manure and fertilizers used in fields?

4 lines
16.

Which method is commonly used for improving cattle breeds and why?

4 lines
17.

What is the work done by the force of gravity on a satellite moving around the earth? Justify your answer

4 lines
18.

An object may appear to be moving for one person and stationary for another. True or False?

a)

True

b)

False

19.

Ashok is standing at a point "A". He walks "R" meters and starts moving in a circular motion w.r.t to point A. He walks for 20 minutes. What is his displacement from point A?

a)

2πR

b)

πR2

c)

R

d)

Cannot be calculated with the information provided

20.

You are running around a jogging track in your apartment. This is a perfect example of uniform motion. Is that correct?

a)

Yes

b)

No

21.

With respect to the example given above, which of the following statements are true?

a)

A's motion is uniform

B's motion is uniform

b)

A's motion is Non-uniform

B's motion is Non-uniform

c)

A's motion is uniform

B's motion is Non-uniform

d)

A's motion is Non-uniform

B's motion is uniform

22.

The SI unit of measuring speed is

a)

meter / second

b)

KM/hour

c)

Centimeter/ second

d)

Millipede/ km :) --> Chose this. Looks very correct.

23.

My office in Magarpatta city is 600 meters from my house. I can walk to office and walk back home in 20 minutes. What is my average speed in SI units?

a)

30 meters per minute.

b)

1200 meters per 20 minutes

c)

20 minutes per meter

d)

None of the above

24.

I walk 1 KM is 1 hour. My average speed in SI units is

a)

1 m/s

b)

(1000/3600) m/s

c)

(1000/60) m/s

d)

(1000/360) m/s

25.

Choose one or more correct answers from below.

a)

Velocity adds the aspect of speed to direction

b)

Velocity adds the aspect of direction to speed.

c)

Speed adds the aspect of direction to Velocity

d)

Speed adds the aspect of velocity to direction

e)

I wish my dad didn't give me this test

26.

I cycle 7.2 KM in 2 hours. Which of the following is the average speed ( expressed in KM/hour and m/s)

a)

3.6 KM/hour , 2 m/s

b)

3.6 KM/hour ,1m/s

c)

3.8 KM/hour ,1m/s

d)

3.8 KM/hour , 2m/s

27.

I walk 120 meters from Point A-> B in 1 minute. And then walk back 120 meters from point B-> A in one minute.

Which of the following is true?

a)

Speed = 2 m/s, Velocity = 2m/s

b)

Speed = 2 m/s, Velocity = 2km/s

c)

Speed = 2 m/s, Velocity = 0m/s

d)

Speed = 0 m/s, Velocity = 2m/s

28.

What is the symbol of Iron?

a)

I

b)

Pb

c)

Fe

d)

Ir

29.

Convert 275K into celcius

(a)  

30.

What is mass/volume?

(a)  

31.

Milk is what type of matter

a)

Mixture

b)

Homogeneous solution

c)

Colloidal

d)

Pure substance

32.

When was cell discovered ?

(a)  

33.

What type of solution is it when a cell shrink?

a)

Hypotonic

b)

Hypertonic

c)

Isotonic

34.

Full form of DNA

(a)  

35.

Plant cell has _______ vacoule than animal cell

a)

Larger

b)

Smaller

c)

Equal

36.

Cardiac muscles are present in ?

(a)  

37.

Velocity is a _________ quantity.

a)

Vector

b)

Long

c)

Scalar

38.

Symbol of Gold

a)

Au

b)

Al

c)

Ar

d)

Ag

39.

Other name of Lysosomes

(a)  

40.

What is the Avagadro No.

a)

6.009 x 10 *23

b)

6.022 x 10 *23

c)

6.022 x 23 * 10

41.

Who is the site of Protein Synthesis

(a)  

42.

what is the Atomic mass of Hydrogen ,Carbon, Oxygen

a)

3, 91,57 respectively

b)

60,3,9 respectively

c)

12,45,8 respectively

d)

1,12,16 respectively

43.

Write The Full Form of C.G.S and the M.K.S

a)

Centimeter Gram Second

b)

Meter, Kilogaram,Second

c)

Center, Goal,Sucess

d)

Mile,Kite,Site

e)

None of the Above

44.

average speed =

a)

v-u/t

b)

s1-s2/t1-t2

c)

Total distance travelled / Total time taken

d)

initial velocity + final velocity / 2

e)

The question is wrong

45.

Name the Three types of solution by osmosis

a)

Hypotonic

b)

Isotonic

c)

Iceotonic

d)

Hetrotonic

e)

Hypertonic

46.

(a)   is a motion in which a body doesn't covers equal distance in equal interval of time

47.

which of the following have Cell organelles

a)

ER

b)

Lysosomes

c)

Animal

d)

Plant

e)

Plastids

48.

Write the Valency of Barrium

(a)  

49.

v = [Hint : it is from one of the identies ]

(a)  

50.

What is Atomic Mass

a)

any substance that has mass and takes up space by having volume

b)

a group of atoms bonded together

c)

I will answer in my future

d)

the mass of an atom of a chemical element expressed in atomic mass units

e)

the smallest particle of a chemical element that can exist.

51.

Displacement is a _________ Quantity

a)

scaler

b)

vector

c)

sector

d)

scaline

52.

An object moves from point A to Point C along the rectangle as shown in the figure


So, Find the distance covered by the moving object.

a)

2 km

b)

5km

c)

10 km

d)

8 km

53.

Calculate the formula unit mass of CaCl*2

a)

111 u

b)

132 u

c)

89 u

d)

98 u

54.

Mitochondria is the

a)

Electricity bulb of cell

b)

Powerfull of the cell

c)

colour giving part of cell

d)

Power house of the cell

e)

None of the these

55.

Speed is a _________ Quantity

a)

scaler

b)

vector

c)

same

d)

viral

e)

dilute

56.

A car covers 20km in 1 hour so speed will be

a)

40 km/ hr

b)

20 km/hr

c)

10 km/hr

d)

16.5 km/hr

57.

A group of 6.022 x 10 *23 empty is called

a)

Mole

b)

Atom

c)

Matter

58.
What part of the water cycle does this picture show?
a)
condensation
b)
precipitation
c)
evaporation
d)
transpiration
59.
What is it called when plants give off water vapor as a waste product?
a)
condensation
b)
evaporation
c)
sublimation
d)
transpiration
60.
Evaporation happens when the sun ___________ water and turns it into vapor.
a)
cools
b)
heats up
c)
freezes
d)
lights up
61.
What is the water cycle?
a)
the 3 forms of water
b)
the movement of water on, above, or below the surface of the Earth
c)
when water melts
d)
when clouds form
62.
Where is most water found on Earth?
a)
glaciers
b)
lakes
c)
rivers
d)
oceans
63.

What converts nitrogen gas into a usable form for plants and animals?

a)

bacteria

b)

rain

c)

fungi

d)

car exhaust

64.

The process in which nitrogen circulates and is recycled is called

a)

The nitrogen cycle

b)

The carbon cycle

c)

The water cycle

d)

The phosphorus cycle

65.
Based on this diagram, which of the following can you infer is the chemical formula for gaseous nitrogen?
a)
N
b)
N2
c)
N3
d)
N4
66.
_____ is the conversion of organic nitrogen into ammonia
a)
Nitrogen Fixation
b)
Ammonification
c)
Denitrification
d)
Assimilation 
67.

True or False: Bacteria fix nitrogen from the atmosphere into a form plants can use

a)

True

b)

False

68.
In the carbon cycle, producers take in the gas __
a)
carbon dioxide
b)
oxygen
c)
nitrogen
d)
carbon monoxide
69.
In what process is Carbon transformed into chemical energy?
a)
Photosynthesis
b)
Respiration
c)
Primary Production
d)
Secondary Production
70.

The circulation of the element Carbon among Earth's atmosphere, land, oceans, and organisms is called _____________.

a)

the Carbon Cycle

b)

the Oxygen Cycle

c)

the Carbon dioxide Cycle

d)

the Water Cycle

71.

Plants use ____________________ to make their own food.

a)

Carbon Dioxide

b)

Oxygen

c)

Materials

d)

Gravity

72.

Which of the following is true about the greenhouse effect? you can choose more than one

a)

It is a natural process

b)

It is caused by gasses trap heat from infrared radiation

c)

It makes life on Earth possible

d)

It is the cause of global warming

73.

What is the name of the first Russian vaccine for Covid-19?

a)

a. Sprintnik V

b)

b. Sputnik V

c)

c. Russ 19

d)

d. Ruvac 19

74.

Which scientist contributed to the first periodic table?

a)

a. Tycho Brahe

b)

b. Dimitri Mendeleev

c)

c. Aristotle

d)

d. Isaac Newton

75.

It is the liquid portion of the blood.

a)

red blood cell

b)

white blood cell

c)

platelets

d)

plasma

76.

What sub atomic particle makes up all of the weight of an atom

a)

Proton, and Neutron

b)

Neutron

c)

Electron

d)

Proton

77.

The unit for measuring electric current is the_______.

a)

a. joule

b)

b. ohm

c)

c. ampere

d)

d. tesla

78.

What is the plane of the Earth’s orbit around the sun?

a)

Eclictic

b)

Ecliptic

c)

Eplictic

d)

Epliptic

79.

all elements with white lettering in the periodic table are

a)

Gasses

b)

Pure substances

c)

Solids

d)

elements that react to each other

80.
What is an example of a synthetic chemical?
a)
polyester 
b)
wood 
c)
cotton
d)
wool
81.
The sky is divided into ____ constellations.
a)
11
b)
22
c)
44
d)
88
82.
Which of the following is an example of an element?
a)
Water
b)
Carbon 
c)
Oil
d)
Carbon Dioxide 
83.

Which of the following is not a mixture?

a)

Pure water.

b)

Sea water.

c)

Air.

d)

Brass.

84.
What is the chemical name of NO2?
a)
Nitrogen dioxide 
b)
Dinitrogen dioxide
c)
Dinitrogen oxide 
d)
Dioxide nitrogen
85.
What do the lines around this magnet represent?
a)
North Pole
b)
South Pole
c)
Magnetic Declination
d)
Magnetic Field
86.

What do you call the flap that closes and opens the airway to prevent food from entering it?

a)

Epiglotis

b)

Epiglottis

c)

Glotis

d)

Glottis

87.

Glucose production will happen within me.

a)

Chloroplast

b)

Mitochondria

c)

Golgi apparatus

d)

Ribosome

88.

Does work done depend upon the velocity of the body?

a)

Yes

b)

No

89.

What will cause greater increase in kinetic energy of a body?

a)

Increase in mass

b)

Increase in velocity

c)

Increase in displacement

d)

Increase in force

90.

What is the SI unit of work done, power, and force respectively?

a)

Joule, Metre, Watt

b)

Metre, Watt, Newton

c)

Joule, Watt, Newton

d)

Newton, Metre, Joule

91.

Find the energy in kWh consumed in 10 hours by a machine of power 500 W.

a)

5000Wh

b)

5000kWh

c)

5kWh

d)

5Wh

92.

When a book is lifted from a table, against which force work is done ?

a)

Muscular Force

b)

Gravitational Force

c)

Magnetic Force

d)

Electrostatic Force

93.

What is the work done when force in the situation shown above ?

a)

Positive

b)

Negative

c)

Zero

94.

A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force. Let us take it that the force acts on the object through the displacement. What is the work done due to gravity ?


(Write only magnitude in number)

(a)  

95.

A lamp consumes 180 kJ of electrical energy in 5 hrs. What is its power ?

a)

18 Watt

b)

36 Watt

c)

10 Watt

d)

90 Watt

96.

A body performs no work. Does it imply that the body possesses energy ?

a)

Never

b)

Always

c)

May be

97.

Who verified experimentally the law of conservation of energy?

a)

John Dalton

b)

James Prescott Joule

c)

Blaise Pascal

d)

Galileo Galilei

e)

Isaac Newton

98.
Which element has 31 protons ?
a)
Gallium 
b)
Germanium
c)
Gadolinium
d)
Polonium
99.
What number indicates the nucleus?
a)
1
b)
2
c)
3
d)
4
100.
What is at the center of every atom?
a)
An electron
b)
A compound
c)
A molecule
d)
A nucleus
101.
The particles with no charge in an atom are the _______.
a)
electrons
b)
neutrons
c)
protons
d)
protons and neutrons
102.
a)
Nucleus, positive
b)
Nucleus, negative
c)
Nucleus, neutral
d)
Electron Cloud, positive
103.

What is the atomic number of chlorine?

a)

35

b)

18

c)

7

d)

17

104.

How many protons are there in an atom of aluminium?

a)

27

b)

13

c)

14

d)

17

105.

What is the symbol of manganese?

a)

Mg

b)

M

c)

Ma

d)

Mn

106.
What are valence electrons?
a)
electrons on the first orbital always
b)
nucleus
c)
the outermost shell
d)
the number of electrons on the outermost orbital
107.
Oxygen’s atomic number is 8. This means that an oxygen atom must have
a)
8 electrons
b)
8 protons
c)
8 neutrons
d)
a mass number of 8
108.

99.9% of the atom's mass is found where?

a)

nucleus

b)

protons

c)

electron cloud

d)

neutrons

109.

Protons are

a)

negative

b)

positive

c)

neutral

110.

Thompson was the first to discover a subatomic particle - the electron. What are the others?

a)

neutrons & positrons

b)

protons & neutrons

c)

positrons & quarks

d)

protons & positrons

111.

Rutherford concluded that the amount of positive charge varies

a)

with the amount of electrons in the nucleus.

b)

as the the amount of isotopes varies.

c)

with the amount of neutrons in the nucleus.

d)

with different elements.

112.

The word "proton" comes from an ancient Greek word meaning

a)

amber.

b)

to change or become flexible.

c)

proteus.

d)

positive.

113.

Electrons are subatomic particles that exist

a)

inside the nucleus.

b)

in simultaneous dimensions.

c)

in parallel universes.

d)

outside the nucleus.

114.
all matter is made of what 
a)
energy 
b)
atoms 
c)
electrons 
d)
compounds 
115.

Neutrons have almost exactly the same mass as

a)

electrons.

b)

positrons.

c)

protons.

d)

quarks.

116.

James Dalton proved that the true nature of the atom could best be described as resembling "plum pudding."

a)

True

b)

False

117.

Only protons & neutrons can be distinguished by mass, charge and position in an atom.

a)

True

b)

False

118.

Which correctly describes the smallest amount of an element?

a)

Atom

b)

Molecule

c)

Compound

d)

Proton

119.

How would H2O be classified? Check all that apply.

a)

Atom

b)

Molecule

c)

Compound

120.

How would O2 be qualified. Check all answers that apply.

a)

Atom

b)

Molecule

c)

Compound

121.

What does conservation of matter mean?

a)

Matter cycles through an ecosystem and 10% is lost as you move through each trophic level.

b)

Matter cannot be created, but can be destroyed.

c)

Matter cannot be created nor destroyed, and cycles through ecosystems.

d)

Matter and energy both move through ecosystems with 100% efficiency.

122.

What does conservation of matter mean?

a)

Matter cycles through an ecosystem and 10% is lost as you move through each trophic level.

b)

Matter cannot be created, but can be destroyed.

c)

Matter cannot be created nor destroyed, and cycles through ecosystems.

d)

Matter and energy both move through ecosystems with 100% efficiency.

123.

What is an element?

a)

A pure substance that cannot be broken down.

b)

Two atoms bonded together.

c)

Two or more different types of atoms bonded together.

d)

An molecule with an unequal distribution of charge.

124.

What are atoms composed of?

a)

Protons and electrons.

b)

Protons, neutrons, and electrons.

c)

Neutrons and electrons.

d)

Ions, elements, and compounds.

125.
What is gold?
a)
element
b)
compound
c)
mixture
126.

How many H atoms are in H2O?

a)

1

b)

2

127.
Carbon dioxide (CO2) contains how many atoms of oxygen?
a)
0
b)
1
c)
2
d)
3
128.

"Total mass of the products formed in chemical reaction is exactly equal to the total mass of the reactants present in it." is a .....

a)

Law of constant proportion

b)

Law of multiple proportion

c)

Law of conservation of mass

d)

All the above

129.

"In a compound, the elements always present in the fixed ratio of their mass." is a ....

a)

Law of constant proportion

b)

Law of conservation of mass

c)

Law of multiple proportion

d)

None of the above

130.

Which correctly describes the smallest amount of an element?

a)

Atom

b)

Molecule

c)

Compound

d)

Proton

131.

How would H2O be classified? Check all that apply.

a)

Atom

b)

Molecule

c)

Compound

132.

How would O2 be qualified. Check all answers that apply.

a)

Atom

b)

Molecule

c)

Compound

133.

What is an element?

a)

A pure substance that cannot be broken down.

b)

Two atoms bonded together.

c)

Two or more different types of atoms bonded together.

d)

An molecule with an unequal distribution of charge.

134.

What are atoms composed of?

a)

Protons and electrons.

b)

Protons, neutrons, and electrons.

c)

Neutrons and electrons.

d)

Ions, elements, and compounds.

135.

What is matter?

a)

Matter has mass and takes up space.

b)

Matter is charged atoms.

c)

Matter has a charge and a mass.

d)

Matter is polar molecules.

136.

How many moles are 98.3 grams of aluminum hydroxide, Al(OH)3? (Atomic mass of Al = 27, H= 1, O = 16)

a)

1.26 moles

b)

0.8 moles

c)

7,673.4 moles

d)

150 moles

137.

How many atoms are contained in 25 g of NaBr? (Atomic mass of Na = 23, Br = 35)

a)

102.96 molecules

b)

0.24 molecules

c)

1.45x1023 molecules

d)

2.34 x 1020molecules

138.
A mole of Neon contains
6.02 x 1023 _____.
a)
atoms
b)
formula units
c)
ions
d)
molecules
139.

How many molecules are in 2.00 moles of H2O?

a)

124x1024 molecules of H2O

b)

1.20x1023 molecules of H2O

c)

12.04 x1023 molecules H2O

d)

124

140.

What is the volume of 5 moles of oxygen gas at room temperature?

a)

112 dm3

b)

112 cm3

c)

120 L

d)

120 mL

141.

The value of Universal Gravitational constant is

a)

6.673X10-11 Nm-2kg2

b)

6.673X10-11 Nm2kg2

c)

6.673X10-11 Nm2 kg-2

d)

6.673 x10-11 N m-2 kg-2

142.

Newton said that any two masses will...

a)

combine into a larger mass.

b)

attract each other.

c)

create gravitational fields.

d)

push each other apart.

143.

According to Newton's law of gravitation, the Earth and the Moon are gravitationally attracted to each other. The more massive Earth attracts the Moon with...

a)

a stronger force than the Moon attracts the Earth.

b)

a weaker force than the Moon attracts the Earth.

c)

the same force as the Moon attracts the Earth.

d)

a force that is sometimes stronger and other times weaker than the Moon attracts the Earth.

144.

The distance between the two masses in the previous situation is halved. Determine the gravitational force in this new situation.

a)

20 N

b)

40 N

c)

80 N

d)

160 N

145.
What states that "every object in the universe attracts every other object"?
a)
Law of Universal Gravitation
b)
Newton's First Law of Motion
c)
My mother
d)
Inertia & gravity
146.
Which of the following is Newton's Law on Gravitation?
a)
F=Gm1m2/r
b)
F = Gm1m2/r2
c)
F = Gm1m2/2r
d)
F = m1m2/2r
147.
Two factors effecting the magnitude of the force of gravity between 2 objects are...
a)
mass and distance 
b)
mass and matter
c)
distance and weight 
d)
weight and mass
148.
If I double the distance between two objects, what happens to their gravitational Force?
a)
4x bigger
b)
4x smaller
c)
2x bigger
d)
2x smaller
149.
The path a planet travels around the sun is called its 
a)
orbit
b)
ellipse
c)
barycenter
d)
precession
150.

The gravitational force between two bodies of masses m1 and m2 separated by distance r is F. State the effect on the gravitational force when m1 increases twice.

a)

2F

b)

1/2 F

c)

4F

d)

4F

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