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CBSE_Science_Class 9_Term2_Model Paper -01_1

Total questions: 119

Worksheet time: 4hrs 5mins

Name
Class
Date
1.
Washing soda has the formula
a)
Na2CO3.7H2O
b)
Na2CO3.10H2O
c)
Na2CO3.H2)
d)
Na2CO3
2.

plaster of paris

a)

CaSO4.� H2O

b)

H2SO4

c)

CH3COC2H5

3.
The science of describing, classifying, and naming living things is called:
a)
Geology
b)
Biology
c)
Taxonomy
d)
Chemistry
4.

WHAT DOES THE "A" IN AIDS STAND FOR?

a)

AUTO

b)

ACQUIRED

c)

AWESOME

5.

WHAT DOES THE "H" IN HIV STAND FOR?

a)

HETERO

b)

HOMO

c)

HUMAN

d)

HELLO

6.

HIV IS A

a)

VIRUS

b)

BACTERIA

7.

JJ Thomson was credited for the discovery of the

a)

center of the universe

b)

proton

c)

electron

d)

neutron

8.

Which device did JJ Thomson use to discover the electron?

a)

X-ray machine

b)

scanning tunneling electron microscope

c)

spectrometer

d)

cathode ray tube

9.

The atomic model associated with Thomson is the

a)

plum pudding model

b)

nuclear mode.

c)

planetary model

d)

the electron cloud model

10.

Which is a finding attributed to Rutherford's Gold Foil Experiment?

a)

atoms are indivisible and have a dense positive nucleus.

b)

atoms are divisible and have multiple layers of electrons scattered uniformly about the atom.

c)

atoms are like plum pudding with positive and negative charges uniformly scattered throughout the atom.

d)

atoms are mostly empty space with a dense positive nucleus.

11.

WHICH FLUID DOES NOT SPREAD HIV?

a)

BLOOD

b)

SALIVA

c)

SEMEN

d)

VAGINAL FLUID

12.
What is the virus that causes AIDS?
a)
Hardly Infected Virus
b)
Human Immunodeficiency Virus
c)
Human Infected Virus
d)
Hate Infections Virus
13.
What body system is attacked by the HIV virus?
a)
The reproductive system
b)
The respiratory system
c)
The endocrine system
d)
The immune system
14.

Which of the following is a symptom of AIDS?

a)

Fever

b)

Swollen lymph nodes

c)

Tiredness

d)

All of the above

15.

What is the full form of AIDS?

a)

a) Acquired immunodeficiency syndrome

b)

b) Accepted immunodeficiency syndrome

c)

c) Acquired immunodeficiency symptoms

d)

d) Accepted immunodeficiency symptoms

16.

It is said, the Tajmahal may be destroyed due to ________________.

a)

A Flood in Yamuna river.

b)

B Decomposition of marble as a result of high temperature.

c)

c Mathura refinery releases toxic gases (like oxides of sulphur) which causes acid rain

d)

D All of the above

17.

The atmosphere of Earth protects life on Earth

a)

(A) by creating pressure allowing for liquid water to exist on the earth’s surface

b)

(B) by absorbing ultraviolet radiations

c)

(C) by warming the surface through greenhouse effect

d)

(D) all of the above

18.

A disease that becomes unusually widespread and even global in its reach is referred to as

a)

a. Epidemic

b)

b. Pandemic

c)

c. Spanish flu

d)

d. Hyperendemic

19.

How is health at risk in a cyclone?

a)

a. spread of water-borne diseases

b)

b. spread of vector-borne diseases

c)

c. spread of air-borne diseases

d)

both a and b

e)

both a and c

20.

Arthropods have ____________ symmetry.

a)

radial

b)

none

c)

jointed

d)

bilateral

21.

Which of the following is NOT a characteristic of arthropods?

a)

Exoskeleton

b)

Jointed appendages

c)

Segmented body

d)

Endoskeleton

22.

What type of circulatory system do arthropods have?

a)

open

b)

closed

23.

The exoskeleton of an arthropod is made of which of the following?

a)

chitin

b)

dentin

c)

protin

d)

chlorotin

24.

Which of the following is NOT a function of the exoskeleton

a)

Protection

b)

Prevents water loss

c)

Attachment of muscles

d)

Aids in digestion

25.

In arthropods, this is complete

a)

(a) circulatory system

b)

(b) respiratory structures

c)

(c) digestive system

d)

(d) reproductive structures

26.
What does the name Arthropod mean?
a)
"Suit of Armor"
b)
"Hard Cover"
c)
"Jointed Foot"
d)
"Tough Foot"
27.
Arthropods make up about _______ of all animals on Earth. 
a)
80%
b)
90%
c)
50%
d)
10%
28.

Which of the following is an Arthropod?

a)

Shark

b)

Turtle

c)

Crab

d)

Snake

29.

What is the Formula Mass Unit? Speak or Type your response into the space below.

4 lines
30.

Calculate the formula unit masses of ZnO, Na2O, K2CO3

4 lines
31.

Prevention of Infectious Diseases. Speak or type your response into the space below.

4 lines
32.

Differentiate between flying lizard and bird. Speak or type your response into the space below.

4 lines
33.

Power of a motor pump is 2 kW. How much water per minute the pump can

raise to a height of 10 m ? Given g = 10 m s~2. Speak or type your answer into the space below.

4 lines
34.

A girl having a mass of 35 kg sits on a trolley of mass 50 kg. The trolley is given

an initial velocity of 4 ms —! by applying a force. Speak or type your answer into the space below.

4 lines
35.

The trolley comes to rest after travelling a distance of 16 m. (a). How much

work is done on trolley ? (6) How much work is done by girl ? Speak or type your answer into the space below.

4 lines
36.

What is potential energy?

a)

The energy an object has due to its atomic structure.

b)

The energy an object has due to its chemical composition.

c)

The energy an object has due to its motion.

d)

The energy an object has due to its position or condition.

37.

Which object has the most potential energy?

a)

A ball resting on the ground.

b)

A ball being thrown at 100 miles per hour.

c)

A ball on top of a refrigerator.

d)

A ball resting on the edge of a cliff.

38.

When is potential energy transformed into kinetic energy?

a)

When an object at rest is lifted to a higher elevation.

b)

When an object at rest remains at rest.

c)

When an object at rest is put into motion.

d)

When an object in motion is stopped and put at rest.

39.

Potential energy is...

a)

energy in motion

b)

stored energy

40.

What two factors affect an object's potential energy?

a)

area and volume

b)

area and height

c)

mass and height

d)

mass and velocity

41.

The least amount of potential energy is at

a)

a

b)

b

c)

c

d)

d

42.

The most potential energy is at

a)

a

b)

b

c)

c

d)

d

43.

Where would a person have to be located to have the minimum potential energy?

a)

up on the roof

b)

down in the basement

c)

in the middle

d)

outside

44.

Where would a person have to be located to have the maximum potential energy?

a)

up on the roof

b)

down in the basement

c)

in the middle

d)

outside

45.
When a pendulum swings, at which point is potential energy at its greatest?
a)
1
b)
2
c)
3
d)
4
46.

Which object will have the largest value for its potential energy?

a)
b)
c)
d)
47.

The drop tower has more potential energy...

a)

at the top of the ride.

b)

at the bottom of the ride.

c)

Potential energy stays the same

d)

I need more information

48.

Energy that is stored in a system or object

a)

Potential Energy

b)

Kinetic Energy

c)

Mechanical Energy

49.

Where an object is located in relation to another object

a)

Speed

b)

Direction

c)

Relative Position

50.

When objects have the potential to change their position due to the force of gravity

a)

Chemical potential energy

b)

Gravitational potential energy

c)

Elastic potential energy

51.

When energy is stored within the matter itself (for example, energy is stored in a battery)

a)

Elastic potential energy

b)

Magnetic potential energy

c)

Chemical potential energy

52.

Energy that is stretched or compressed within an object (for example, stretching the string on a bow)

a)

Elastic potential energy

b)

Magnetic potential energy

c)

Static potential energy

53.

When certain metal objects in a magnetic field have the potential to change their position due to the force of magnetism

a)

Static potential energy

b)

Elastic potential energy

c)

Magnetic potential energy

54.

When charged particles in an electrostatic field have the potential of moving toward the opposite charge or away from the same charge

a)

Static potential energy

b)

Magnetic potential energy

c)

Chemical potential energy

55.

The field around an object that exerts a gravitational pull on all other objects in the field

a)

Magnetic field

b)

Gravitational field

c)

Force

56.

An attractive force that acts between all matter that has mass (i.e. a dropped book falls to the floor)

a)

Gravity

b)

Force

c)

Potential energy

57.

The area around a magnet in which there is magnetic force

a)

Magnetic field

b)

Electrostatic

c)

Mass

58.

An electric field produced by static electric charges. It forms around a charged object

a)

Magnetic field

b)

Gravitational field

c)

Electrostatic field

59.

The buildup of electrons on the surface of an object

a)

Electrostatic field

b)

Static electricity

c)

Magnetic field

60.

Potential Energy derivation. Speak or type your response into the space below.

4 lines
61.
You cannot hear ultrasound because it is:
a)
too loud
b)
too quiet
c)
high frequency
d)
low frequency
62.
What type of frequency does sonar use?
a)
High frequency
b)
Low frequency
c)
Medium frequency
d)
Any frequency
63.
Sound travels at 1400m/s in water. If a ship sends a sonar signal to map the bottom of the ocean and it returns after 2 seconds, how deep is the ocean?
a)
700m
b)
1400m
c)
2800m
d)
6000m
64.
What is ultrasound mostly used for ?
a)
Shipping
b)
Military
c)
Medical use
d)
Firefighter
65.
Infrasound is used in a variety of applications including sonar and ultrasound imaging.
a)
True
b)
False
66.
 The sonar that boats use for ultrasound is to determine the distance that an object is underwater.
a)
True
b)
False
67.
What are two ways that an ultrasound is used?
a)
transverse waves and longitudinal waves
b)
hertz and meters
c)
sonar and ultrasound imaging
d)
music instruments and amplify the sound
68.
You can hear ultrasound
a)
True
b)
False
69.
What frequency range represent the human hearing capacity
a)
Below 20 Hz
b)
Between 20 Hz and 20 000 Hz
c)
Between 20 000Hz and 40 000 Hz
d)
Above 20 000 Hz
70.
Which is a transverse wave?
a)
P wave 
b)
S wave
c)
Ultrasound
d)
Infrasound
71.
Which wave can travel through the earth core?
a)
S wave
b)
P wave
72.
Which mammal uses sonar to detect objects in the dark?
a)
Mouse
b)
Dog
c)
Bat
73.
You cannot hear ultrasound because it is:
a)
too loud
b)
too quiet
c)
high frequency
d)
low frequency
74.
Sound travels at 1400m/s in water. If a ship sends a sonar signal to map the bottom of the ocean and it returns after 2 seconds, how deep is the ocean?
a)
700m
b)
1400m
c)
2800m
d)
6000m
75.
What is ultrasound mostly used for ?
a)
Shipping
b)
Military
c)
Medical use
d)
Firefighter
76.
 The sonar that boats use for ultrasound is to determine the distance that an object is underwater.
a)
True
b)
False
77.
What frequency range represent the human hearing capacity
a)
Below 20 Hz
b)
Between 20 Hz and 20 000 Hz
c)
Between 20 000Hz and 40 000 Hz
d)
Above 20 000 Hz
78.

Ultrasound waves are sound waves that are too low pitched for the human ear to hear.

a)

True

b)

False

79.

Ultrasound occurs at frequencies above 20,000 Hz.

a)

True

b)

False

80.

Which of these animals use(s) echolocation? Choose all that apply.

a)

bats

b)

dolphins

c)

elephants

d)

cats

e)

owls

81.

Which type of vibrations have the HIGHEST amount of energy?

a)

infrasound

b)

sound

c)

ultrasound

d)

They all have the same

amount of energy.

82.

A submarine emits a sonar pulse, which returns from under water cliff in 1.02 s.

If the speed of sound in salt water is 1,531 m s—!, how far away is the cliff?

Speak or type your response into the space below.

4 lines
83.

How are power and work related? Speak or type your response into the space below.

4 lines
84.

_______ calcination of limestone, consists of the oxides of calcium and magnesium.

a)

a) Quick lime

b)

b) fat lime

c)

c) hydraulic lime

d)

d) all the above

85.

Give the names of the elements present in the following compounds.

Quick lime

a)

Calcium, Oxygen

b)

Hydrogen, Bromine

c)

Sodium, Hydrogen, Carbon, Oxygen

d)

Potassium, Sulphur, Oxygen

86.

Give the names of the elements present in the following compounds.

Hydrogen bromide

a)

Calcium, Oxygen

b)

Hydrogen, Bromine

c)

Sodium, Hydrogen, Carbon, Oxygen

d)

Potassium, Sulphur, Oxygen

87.

Give the names of the elements present in the following compounds.

Baking powder

a)

Calcium, Oxygen

b)

Hydrogen, Bromine

c)

Sodium, Hydrogen, Carbon, Oxygen

d)

Potassium, Sulphur, Oxygen

88.

Give the names of the elements present in the following compounds.

Potassium sulphate

a)

Calcium, Oxygen

b)

Hydrogen, Bromine

c)

Sodium, Hydrogen, Carbon, Oxygen

d)

Potassium, Sulphur, Oxygen

89.

Rutherford discovered the nucleus by the experiment

a)

alpha-scattering experiment

b)

beta-ray irradiation

c)

nuclear fission

d)

plasma creation

90.

Bohr atom model deals with the ..... orbits of electrons

a)

Circular

b)

elliptical

c)

both circular and elliptical

d)

none of the above

91.

In Bohr atom model which of the quantity is quantized?

a)

angular momentum

b)

energy

c)

linear momentum

d)

torque

92.

When an electron jumps from its orbit to another orbit, energy is

a)

A. emitted only

b)

B. absorbed only

c)

C. no effect

d)

D. emitted and absorbed

93.

When an electron changes its orbit from outer to inner energy is

a)

A. absorbed

b)

B. released

c)

C. no change

d)

D. remains constant

94.

Bohr's atomic model is based upon

a)

A. Einsteins relativistic theory

b)

B. classical theory

c)

C. planks quantum theory

d)

D. both b and c

95.
4 lines
96.

They cause stomach illness or even death.

a)

Penicillin

b)

Athletes Foot

c)

Algae

d)

Salmonella / E Coli

97.

A fungus that causes skin disease.

a)

Ring Worm

b)

Salmonella

c)

Yeast

d)

Athletes Foot

98.

A fungus that is usually located on your feet which causes skin disease.

a)

Ring Worm

b)

Athletes Foot

c)

E Coli

d)

Protozoa

99.

Helpful in the making of bread.

a)

Penicillin

b)

Salmonella

c)

Yeast

d)

Fungi

100.

Helps to digest the food in your stomach.

a)

Fungi

b)

Algae

c)

Yeast

d)

Bacteria

101.

A fungus used as a medicine.

a)

Yeast

b)

Bacteria

c)

Penicillin

d)

Algae

102.

Helping in the making of yogurt and cheese.

a)

Yeast

b)

Penicillin

c)

Salmonella

d)

Bacteria

103.

_____________ can be many different sizes ranging from microscopic single celled yeasts used in bread making to macroscopic fungi which contain many cells such as moulds, mushrooms, and toadstools.

a)

Protozoa

b)

Fungi

c)

Yeast

d)

Algae

104.

_____________ are single-celled spherical, spiral or rod shaped organisms.

a)

Yeast

b)

Algae

c)

Penicillin

d)

Bacteria

105.

_______________ are parasites, which means they can only survive inside the cells of other living things.

a)

Viruses

b)

Protozoa

c)

Algae

d)

Fungi

106.

________________ come in many different sizes from microscopic single celled diatoms used in toothpaste to macroscopic alga which contain many like seaweed.

a)

Algae

b)

Fungi

c)

Protozoa

d)

Yeast

107.

____________ single celled organism which cause diseases such as malaria, and sleeping sickness. They are also helpful in the treatment of sewage waste where they eat the harmful bacteria making it safe for disposal.

a)

Protozoa

b)

Alagae

c)

Yeast

d)

Fungi

108.

Which observation supports the claim that microorganisms are helpful to ecosystems?

a)

Microorganism are to small to been seen without special equipment.

b)

Microorganism need water and energy to survive.

c)

Millions of microorganism can often be found in soil.

d)

Microorganisms break down dead plants and animals, making nutrients available.

109.

Some microorganism are harmful when they enter other living things and cause living things to ______________.

a)

Grow quickly

b)

Get sick

c)

Reproduce

d)

Produce Energy

110.

Organisms that live in the intestines of humans are helpful when they______________.

a)

Block nutrients that humans need.

b)

Help break down food for humans to use.

c)

Secrete chemicals that cause disease.

d)

Enter the bloodstream of humans.

111.

A living thing that is too small to be seen without a microscope.

a)

Decomposer

b)

Health

c)

Microorganism

d)

Yeast

112.

An organism that gets energy by using dead organisms, nonliving materials, or waste as food.

a)

Decomposer

b)

Microorganism

c)

Microscope

d)

Beneficial

113.

A scientific tool used to see small objects more clearly.

a)

Microorganism

b)

Decomposer

c)

Beneficial

d)

Microscope

114.

If something is BENEFICIAL it is ___________

a)

Helpful

b)

Microscopic

c)

A single celled fungus

d)

A scientific tool used to see small objects.

115.

A single-cell fungus

a)

Health

b)

Decomposer

c)

Microorganism

d)

Yeast

116.

How microorganisms can enter our body and cause damage? Speak or type your answer into the space below.

4 lines
117.

A SONAR installed on a submarine sends out signal and receive an echo 5 s

later. Calculate the speed of sound in water if the distance of object from

submarine is 3,625 m.

4 lines
118.

What is global warming? What are greenhouse gases? List a few effects of global warming. Speak or type into the space below.

4 lines
119.

What is normal range of hearing ? Give structure of ear to explain as to how sound is conveyed to brain?

Speak or type your response into the space below.

4 lines

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