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science

Total questions: 55

Worksheet time: 2hrs 35mins

Name
Class
Date
1.

The process of depositing a layer of any desired metal on another material by means of electricity is called

a)

Electrolyis

b)

Electric current

c)

Electroplating

d)

Electromagnetism

2.

What is the full form for CFL

a)

Combustible fluoride lamp

b)

Compact fluoride lamp

c)

Combustible fluorescent lamp

d)

Compact fluorescent lamp

3.

The metal rods or plates through which the current enters or leaves the conducting solution are called

a)

electrodes

b)

electrolytes

c)

ions

d)

conductors

4.

Adding common salt to distilled water makes it

a)

Good Conductor

b)

Poor Conductor

c)

No change

d)

Both A and B

5.

Which one of the following solutions will not conduct electricity?

a)

lemon juice

b)

vinegar

c)

tap water

d)

vegetable oil

6.

the method of purification of metals by using electricity is known as

a)

electroplating

b)

electrorefining

c)

electrometal

d)

none of these

7.

Select the poor conductors of electricity

a)

Honey

b)

Plastic

c)

Vinegar

d)

Distilled Water

8.

Electroplating prevents

a)

electric current

b)

chemical effect

c)

lightening

d)

rusting

9.

LED stands for

a)

light emitting diode

b)

light efficient diode

c)

length emitting diode

d)

light emitting device

10.

Find the odd one out

a)

Distilled water

b)

Vegetable oil

c)

Milk

d)

Honey

11.

which of the following is/are conductor(s)?

a)

Metals

b)

Electrolytes

c)

Rainwater

d)

All of them

12.

Alloys of metals

a)

allow electric current to flow through them

b)

do not allow electric current to flow through them

c)

sometimes allow and sometimes do not allow electric current to flow through them

d)

None of these

13.

Choose insulator from the following:

a)

Distilled water

b)

Plastic

c)

Wood

d)

All of them

14.

Tin cans used for storing food are made by electroplating

a)

copper on iron

b)

iron on tin

c)

tin on zinc

d)

tin on iron

15.

While trying to put out fire in an electrical appliance, we should

a)

pour distilled water on it

b)

pour rain water on it

c)

pour tap water on it

d)

none of these

16.

Iron is coated with (a)   to protect it from corrosion.

17.

The article to be electroplated is made

a)

the anode

b)

the cathode

c)

either anode or cathode

d)

none of these

18.

An (a)   is an atom or molecule with an electric charge created by loss or gain of electrons.

19.

The filament of the bulb gets heated to a high temperature due to the

a)

magnetic effect of current

b)

heating effect of current

c)

chemical effect of current

d)

all of these

20.

During electrolysis of water,

a)

hydrogen gas is produced

b)

oxygen gas is produced

c)

water is produced

d)

both (a) and (b)

21.
Which device measures sound waves?
a)
Oscilloscope
b)
Stethoscope 
c)
Radio
d)
I don't know
22.

Sound is a form of energy produced by ______________.

a)

Vibrations

b)

Distances

c)

Prisms

d)

Forces

23.

Sound waves travel the FASTEST through _____________.

a)

Gases

b)

Liquids

c)

Solids

24.

What is Pitch?

a)

How loud or soft a sound is.

b)

Muscle that holds vocal cords.

c)

Movement back and forth.

d)

How high or low a sound is.

25.
Why is sound able to travel faster through a solid than a gas?
a)
Gas molecules are packed tightly.
b)
Sound does not travel faster through a solid than a gas.
c)
Solid molecules are packed tightly.
d)
Gas molecules move slowly.
26.

__________ is the loudness or softness of a sound. 

a)
Echo
b)
Volume
c)
Pitch
d)
Vibration
27.

The volume of a sound is measured in units called ________

a)

decibels

b)

hertz

c)

frequency

d)

amplitude

28.
A longer string makes a _______ pitch than a short string.
a)
louder
b)
softer
c)
higher
d)
lower
29.
If a sound has a high amplitude then it also has a ____________!!!
a)
fast echo
b)
slow pitch
c)
high volume
d)
low volume
30.

Which of the following sound wave produces the highest pitch of sound?

a)
b)
c)
d)
31.

Choose the correct statements. (2 answers)

a)

P - The loudness increases

b)

Q - The pitch decreases

c)

R - The loudness decreases

d)

S - The pitch increases

32.

Diagram shows 3 types of sound waves generated from speaker. Which of the following statements is true?

a)

P has a higher pitch than Q

b)

Q has a higher pitch than R

c)

R has the highest pitch

d)

P, Q and R have the same pitch

33.

Which waveform has the lowest frequency?

a)

(a)

b)

(b)

c)

(c)

d)

(d)

e)

(e)

34.

If the distance represented by the letter A (the amplitude) were increased, how would it change the sound?

a)

The sound would be higher.

b)

The sound would be softer.

c)

The sound would be lower.

d)

The sound would be louder.

35.

What is changed in the second picture?

a)

Someone is talking louder in picture 2

b)

Someone is talking softer in picture 2

c)

Someone is talking lower pitch in picture 2

d)

Someone is talking higher pitch in picture 2

36.

What is changed in the second picture?

a)

Someone is talking louder in picture 2

b)

Someone is talking softer in picture 2

c)

Someone is talking lower pitch in picture 2

d)

Someone is talking higher pitch in picture 2

37.

Frequency is measured in the unit of

a)

Ampere (A)

b)

Hertz (Hz)

c)

Mole (mol)

d)

Meter (m)

38.

Which of the following statement is true?

a)

The higher the amplitude, the higher the pitch of sound

b)

The lower the amplitude, the louder the sound

c)

The higher the frequency, the higher the pitch

d)

The lower the frequency, the louder the sound

39.

What property of this wave is represented by the letter "A"?

a)

amplitude

b)

crest

c)

trough

d)

wavelength

40.

People with the nerve deafness is due to permanent damage to a nerve ending in the ______________

a)

ear canal

b)

eardrum

c)

cochlea

d)

anvil, stirrup, hammer (three bones)

41.
A sound with a high frequency has a _____ pitch. A sound with a ____ frequency has a low pitch.
a)
high, low
b)
low, high
c)
medium, high
d)
high, medium
42.
A sound that bounces off a surface is called an ________.
a)
loud sound
b)
echo
c)
repeat
d)
quiet sound
43.
A back and forth movement of matter
a)
volume
b)
vibration
c)
pitch
d)
frequency
44.
how high or low a sound is
a)
frequency
b)
volume
c)
vibration
d)
pitch
45.
Sound travels FASTEST through which of these materials?
a)
Air
b)
Empty space
c)
Metal
d)
Water
46.
Sound is caused by? 
a)
force
b)
vibrations
c)
instruments
47.
Sound is a form of? 
a)
energy
b)
pitch
c)
volume
48.
Why is sound able to travel faster through a solid than a gas?
a)
Gas molecules are packed tightly.
b)
Sound does not travel faster through a solid than a gas.
c)
Solid molecules are packed tightly.
d)
Gas molecules move slowly.
49.
Sound does not travel in space because
a)
Space is too far away.
b)
There is no matter in space.
c)
Space is the final frontier
d)
Space has planets.
50.
Why is the school library covered with carpet?
a)
So everyone can make a lot of noise
b)
to help absorb sounds to keep it quiet
c)
because it looks good
d)
to help absorb sounds so it can stay noisy
51.

______________ sounds have a larger amplitude

a)

quiet

b)

loud

52.

What are the units for intensity?

a)

hertz

b)

decibels

c)

dopplars

d)

sonars

53.

Which property of a sound wave determines how close together the particles are in the compression region?

a)

amplitude

b)

frequency

c)

wavelength

d)

wave speed

54.
What is Pitch?
a)
How loud or soft a sound is
b)
muscle that holds vocal cords
c)
movement back and forth
d)
how high or low a sound is
55.
How does sound travel?
a)
Sounds travels in waves
b)
sound travels slow
c)
sound travels fast
d)
sound doesn't travel

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