Question bank

Chapter-1   Matter
Q-1 State True or False and correct the false statement giving reasons
(1) Dark clouds are made of matter but white clouds are not.
(2) Blue colour of the sky is also because of matter.
(3) The shape of solids and liquids is fixed.
(4) Smallest particle of water is an atom.
(5) Packing of molecules is most dense in solids.
(6) Particles of matter in a gas move in a circular fashion.
(7) Movement of particles in gases is much more than in solids.
Q-2 Fill in the blanks
(1) Inter-molecular space is ____________ in gases.
(2) Liquids are denser than ____________.
(3) Molecules in solids are ____________ packed.
(4) Water forms drops because of ____________.
(5) A molecule of oxygen has two atoms of ____________.
(6) Compressibility is maximum in ____________.
(7) Solids and liquids have definite ____________.
Q-3 Find the odd option, giving reasons
(1) Stretchable layer, fixed shape, fixed size, fixed volume.
(2) No shape, no size, no volume, does not need a container.
(3) No fixed shape, visions, flow, no fixed volume.
(4) No texture, fixed shape, compressible, no fixed volume.
Q-4 Short answer type questions
(1) How do we define matter?
(2) Differentiate between solid and liquid on one criteria.
(3) What are the states of matter?
(4) Why don’t solids change shape like liquids?
(5) What is 'inter molecular' attraction?
(6) Draw molecular models of solids and liquids.
(7) How can you prove that liquids have intermolecular spaces?
Q-5 Long answer type questions
(1) Explain how the solid state of matter differs from the gaseous state of matter?
(2) Why does a grain of salt dissolve on its own, in water?
(3) Describe the arrangement of particles in solid, liquid and gas.
(4) Explain why liquids take the shape of the container but solids do not?
(5) Describe an experiment to prove that molecules in liquids are always in motion.
(6) How can you prove that molecules of water stick together?
(7) Which properties of solids are dependent upon its particles being tightly packed?
Q-6 Match the column
Multiple Choice Questions
Q-1 A property that liquids have but solids and gases do not have is -

(i)

Compressibility

(ii)

Fluidity

(iii)

Uncertain volume

(iv)

Stretchable Layer

Q-2 The state of matter in which particles move the least: –

(i)

Liquids

(ii)

Solids

(iii)

Gases

(iv)

Both liquids and gases
Q-3 The particles in liquids are more closely packed than in –

(i)

Solids

(ii)

Solids and gases

(iii)

Gases

(iv)

None of the above
Q-4 Intermolecular space is minimum in case of

(i)

Solids

(ii)

Gases

(iii)

Liquids

(iv)

Both gases and liquids
Q-5 The state of matter that expands to cover the space available to it is –

(i)

Liquids and gases

(ii)

Only gases

(iii)

Only liquids

(iv)

Liquids and solids
Q-6 Inter molecular attraction is least in case of

(i)

Solids

(ii)

Liquids

(iii)

Liquids and gases

(iv)

Gases

Q-7 The particle of this matter has a fixed volume and it can flow. It must be -

(i)

Solids

(ii)

Gas

(iii)

Both gas and liquid

(iv)

Liquid

Chapter-2   Physical Quantities and Measurement
Q-1 State True or False and correct the false statement giving reasons.
(1) The distance between two fixed points is called mass.
(2) The SI unit of length is foot.
(3) We can measure the length of cloth by using a metre ruler.
(4) The mass of one pound is almost equal to one kilogram.
(5) A beam balance can measure volume.
(6). Surface area can be estimated using a graph paper.
(7) Our body temperature is much less in centigrade thermometer.
(8) The unit of area is always written as m/2.
(9) In digital thermometers there is no chance of parallax error.
(10) The mercury laboratory thermometer can be taken out and brought to eye level for taking the reading to avoid parallax.
Q-2 Fill in the blanks
(1) We should prefer to use ____________ thermometers over mercury thermometers.
(2) Mercury laboratory thermometers are longer than ____________.
(3) We use instruments to get ____________ measurements.
(4) In centigrade scale the boiling point of water is ____________.
(5) The interval between two events can be called as ____________.
(6) The unit of measurement should be correct and ____________.
(7) A leap year is slightly bigger than ____________.
(8) Area of regular figures can be calculated by using ____________.
(9) In a clock the time between two ticks is ____________.
(10) 2700 kg in metric ton is equal to ____________.
Q-3 Find the odd option giving reasons
(1) cm, m, lb, km
(2) year, leap year, second, km
(3) kg, mass, beam balance, clock
(4) Thermometer, °C, K, second
Q-4 Short answer type questions
(1) How can we take correct measurement by a ruler that is broken up to 3 cm.
(2) How is a stopwatch useful?
(3) Can a clinical thermometer be used to measure temperature of boiling water?
(4) Name one multiple and one submultiple of meter.
(5) Why is the mercury laboratory thermometer longer than the mercury clinical thermometer?
(6) In a mercury clinical thermometer, why is there a kink?
(7) What is hypothermia?
(8) Name two precautions one should take while using a sensitive balance.
Q-5 Fill in the blanks:
(a) Physical quantity is a quantity that can be ____________.
(b) Space between two ends of a ruler is its ____________.
(c) Temperature measures the ____________ of a body.
(d) The unit for area of an irregular body can be ____________.
Q-6 Complete the following :
(a) How to convert 5000 meter into kilometer:
(b) How to convert one year to hours :
(c) How will you avoid parallax error in reading a length:
(d) How will you measure the mass of a packet of paneer :
Q-7 Long answer type questions:
(1) How are standard units useful in measuring physical quantities?
(2) What are benefits of using the 24 hour clock system?
(3) What are the advantages of a digital thermometer?
(4) Describe how you will measure the area of a football ground.
(5) What are the steps in taking readings from a laboratory mercury thermometer?
(6) Using a grid paper; how can we estimate the area of an irregular surface?
(7) What are the benefits of using internationally accepted units of measurement?
(8) Convert the following as indicated: a) 1500 kg to metric ton b) 1500 kg to quintal c) 15 lb to kg d) 10 mg to kg
Q-8 Match the three columns
Multiple Choice Questions
Q-1 When we say this box weighs 5 kg; "5" is a number what is “kg”?

(i)

quantum

(ii)

Length

(iii)

unit

(iv)

magnitude
Q-2 One centimetre is same as :

(i)

1/100 km

(ii)

1/10 m

(iii)

1/100 m

(iv)

100 mm
Q-3 Which of the following defines volume?

(i)

It is the quantity of matter in the body.

(ii)

It is the length and breadth of the body.

(iii)

It is the heat contained in the body.

(iv)

It is the space occupied by a body.

Q-4 The number of beats of your friend’s pulse can be measured accurately by using

(i)

wrist watch

(ii)

pendulum clock

(iii)

digital watch

(iv)

stopwatch

Q-5 Symbol of ampere is written as :

(i)

Amp

(ii)

A

(iii)

Aa

(iv)

aa
Q-6 In a mercury clinical thermometer where is the kink placed?

(i)

After the bulb

(ii)

At 33 degree celsius

(iii)

At the normal body temperature

(iv)

At freezing point of ice
Q-7 Parallax error can be avoided by :

(i)

Taking readings multiple times

(ii)

Taking readings from a distance

(iii)

Keeping eye position at perpendicular angle

(iv)

Taking readings with one eye closed
Q-8 The surface occupied by an object is :

(i)

Area

(ii)

Mass

(iii)

Spectrum

(iv)

Length
Q-9 Year and month are actually :

(i)

Not units

(ii)

Units of time

(iii)

Units of age but not of time

(iv)

Units used in the calendar
Q-10 The departure time of a train listed as 19:30 hours should be correctly interpreted as –

(i)

1 .30 pm

(ii)

7.30 pm

(iii)

9.30 a.m.

(iv)

1.30 a.m.
Chapter-3   Force
Q-1 State True or False and correct the false statement giving reasons
(1) Force does not have a proper direction.
(2) Force can be described as push or pull.
(3) There are no benefits from friction.
(4) Rolling friction happens in wheels.
(5) Moving heavier bodies is easy because friction is less.
(6) Wet surfaces have the same friction as dry surfaces
(7) When a piece of iron touches a magnet it becomes a contact force.
Q-2 Fill in the blanks
(1) Net force of equal and opposite force on a body is ____________.
(2) Two components of force are ____________ and ____________.
(3) Magnetic force is ____________ force.
(4) Friction acts opposite to ____________.
(5) In tug of war we apply ____________ force.
(6) Application of powder in carrom reduces ____________.
(7) Sliding friction is ____________ than static friction.
Q-3 Short answer type questions
(1) What effect a force can have in the following situations: (a) On a moving body (b) On a body at rest (c) On a soft object
(2) Give an example, how force can change the direction of motion.
(3) Why is friction considered a contact force?
(4) What kind of surface will have low friction?
(5) If you stop pedaling your bike why does it stop even without applying brakes?
(6) Why it is sometimes, difficult to walk on a tiled floor?
Q-4 Name the force and its type, in the following examples:
(a) A ball falling from a height
(b) A donkey moves a cart
(c) A ball stops rolling
Q-5 Long answer type questions
(1) What can happen when two forces act on a body (a) In opposite direction (b) In the same direction
(2) What are contact forces? Explain with the help of examples.
(3) Why we should be more careful to walk on wet floors?
(4) Explain the three kinds of friction in brief
(5) What are the factors that affect friction?
(6) What are the advantages of friction? Give two examples.
(7) State three disadvantages of friction and how can we reduce it?
Q-6 Match the column
Multiple Choice Questions
Q-1 How can we stop a moving body?

(i)

Force as push or pull must be applied.

(ii)

Force must be applied in the same direction.

(iii)

Force can be applied in any direction.

(iv)

Push or pull must be applied in the opposite direction.

Q-2 When we apply force it does not change the :

(i)

Volume of the body

(ii)

Mass of the body

(iii)

Width of the body

(iv)

Shape of the body
Q-3 Muscular force used to lift weights is :

(i)

A type of non-contact force

(ii)

A type of gravitational force

(iii)

A contact force

(iv)

Muscle power is not a force
Q-4 A bar magnet slipped from the hands of Leena and fell to the ground. The main force responsible for its fall to the ground was -

(i)

Magnetic force

(ii)

Gravitational force

(iii)

Force of friction

(iv)

Muscular force
Q-5 Which of the following is not an example of contact force?

(i)

Person drawing water from a well

(ii)

Person pushing a small box

(iii)

Ball falling from a height

(iv)

Boy braking his bike
Q-6 Which of the following is not correct about force?

(i)

It changes the length of the body.

(ii)

It can reduce the mass of a body.

(iii)

It can reduce the volume of a balloon.

(iv)

It can change the direction of motion of a body.
Q-7 A box is being pushed from north to south; in which direction will the force of friction act?

(i)

North to South

(ii)

South to North

(iii)

East to West

(iv)

West to East
Chapter-4   Energy and Simple machines
Q-1 State True or False and correct the false statement giving reasons.
(1) When you are waiting for your school bus you are doing some work.
(2) In a pulley effort can be applied on any direction.
(3) Our arm is an example of class 1, lever.
(4) A door knob is an example of wheel and axel.
(5) In a proper beam balance, the two arms should be equal.
(6) The common pair of scissors is an example of class 3 lever.
(7) Pedals of cycles are convenient points for application of force.
(8) Pushing a barrel along a ramp is easier than rolling it on the same ramp.
(9) Screws are used to split large pieces of wood.
(10) The fishing rod is actually a class 3, lever.
Q-2 Find the odd option giving reasons:
(1) Sewing needle, nail, incisors, beam balance.
(2) Arm, tongs, fishing rod, MA more than 1.
(3) Door knob, car steering wheel, screw driver, pulley.
(4) Wheel barrow, nutcracker, bottle opener, MA less than 1.
Q-3 Fill in the blanks
(1) A knife is an example of ____________.
(2) A doorknob is an example of ____________.
(3) The incisor tooth acts like a ____________.
(4) The end of the screw is always ____________.
(5) In a class 2, lever the effort arm is always ____________.
(6) A simple pulley has ____________ mechanical advantage.
(7) In a crowbar the load should be ____________ the pivot.
(8) Nails are the example of ____________.
(9) Woodcutter's axe is an example of ____________.
(10) To lift heavy loads we can use ____________ and ____________.
Q-4 Short answer type questions
(1) Define simple machine and give one of its application.
(2) Why inclined planes are not made steep?
(3) Machines do not produce energy yet how do they help us?
(4) What is fulcrum in a lever?
(5) In a machine effort of 20 kgf is applied to lift a load of 100 kgf ; what is the mechanical advantage?
(6) What is ‘law of the lever’?
(7) How can a beam balance be manipulated?
(8) What are the directions of effort and load in a class 2 lever?
(9) What is the mechanical advantage of a ‘fixed pulley’?
(10) Give two examples of ‘wheel and axle.’
Q-5 Long answer type questions
(1) Enumerate two benefits of simple machines with example.
(2) Describe the three kinds of levers with one example of each.
(3) When can we say that "work is done"? Explain giving an example.
(4) What is mechanical advantage? Explain with an example.
(5) Explain inclined plane and its application in a screw.
(6) Explain the functioning of our arm as a kind of lever.
(7) Machines that increase the force of effort have mechanical advantage. Explain giving an example of a class 2, lever.
(8) Describe the functioning of a screwdriver.
(9) Explain class 3, lever giving examples.
(10) A load of 600 kgf was lifted by a lever by applying 1/3rd force. Explain what mechanical advantage did the lever provide?
Q-6 Match the column
Multiple Choice Questions
Q-1 Which of the following statements is incorrect about simple machines?

(i)

Simple machines need energy to do work

(ii)

Simple machines do not need energy to do work

(iii)

Simple machines make our work convenient

(iv)

Simple machines have been in use since ancient times
Q-2 Winding roads to a hill station is an example of :

(i)

Wheel and axle

(ii)

Wedge

(iii)

Inclined plane

(iv)

Fulcrum
Q-3 If efficiency of a machine is 1; in percentage terms it means:

(i)

One percent

(ii)

Ten percent

(iii)

Because it is a ratio percent is not calculated

(iv)

Hundred percent

Q-4 Fulcrum is the point –

(i)

where the effort is applied

(ii)

where the force is applied

(iii)

around which the beam of a lever moves

(iv)

where the load and effort arm become equal
Q-5 To ensure mechanical advantage in a lever:

(i)

The load arm should be longer than the effort arm

(ii)

The pivot should be in the middle of the lever

(iii)

The load and effort should be equal

(iv)

The load arm should be shorter than the effort arm

Q-6 In a ramp when the inclination is steep

(i)

Less effort is needed to move an object along the ramp

(ii)

More effort is needed to move an object along the ramp

(iii)

Same effort is needed to move an object along the ramp

(iv)

Inclination of a ramp does not make a difference
Q-7 In class 3, lever the mechanical advantage is -

(i)

always more than 1

(ii)

always less than 1

(iii)

always equal to 1

(iv)

never less than 1
Q-8 An application of the wheel and axel can be found in -

(i)

a screw driver

(ii)

screw

(iii)

knife

(iv)

bottle opener
Q-9 A screw can be described as a

(i)

wedge wrapped around a shaft

(ii)

class 2, lever with no fulcrum

(iii)

inclined plane wrapped around a cylinder

(iv)

extended wheel and axel
Chapter-5   Light
Q-1 State True or False and correct the false statements giving reasons.
(1) We see the Moon because it is a luminous source of light.
(2) Opaque objects absorb the light and some light is reflected so we see them.
(3) We see various things because our eyes has light.
(4) On a cloudy day shadows are not formed.
(5) Image in the pin hole camera has a left-right reversal.
(6) In solar eclipse we can’t see the Moon.
(7) If there is lunar eclipse it must be full Moon night.
Q-2 Fill in the blanks
(1) When a beam of light meets an obstacle it does not _________.
(2) Medium that allow light to pass partially is called _________.
(3) When the source of light is larger than the object the size of umbra is _________.
(4) The darkest portion of a shadow is called _________.
(5) An image shows colour but a shadow _________.
(6) In a pinhole camera when the object comes near the image becomes _________.
(7) In case of a Solar eclipse the heavenly body that is in the middle is _________.
Q-3 Short answer type questions
(1) Name two artificial and natural sources of light.
(2) If air can flow through a curved pipe, why can’t light travel through it?
(3) Give an example of bioluminescence.
(4) Define an opaque body.
(5) Give a reason why a shadow is formed?
(6) Where is the image formed in a pinhole camera?
(7) What is the use of a pinhole, in a pinhole camera?
Q-4 Long answer type questions
(1) Explain how we are able to see an object?
(2) What is meant by rectilinear propagation of light? Explain giving example.
(3) How can we calculate the size of the object from a pinhole camera?
(4) How does the shadow of a tree move even though the tree remains in its position?
(5) Most of the objects around us are non-luminous; yet how are we able to see them?
(6) How does the image in a pinhole camera change in the following conditions: (a) There are two holes close by. (b) Distance between the screen and the hole is increased.
(7) What are the differences between a shadow and the image of an object?
Q-5 Match the column
Multiple Choice Questions
Q-1 Which of the following is not a luminous source of light?

(i)

Fireflies

(ii)

Lightning in a thunderstorm

(iii)

The Moon

(iv)

The stars
Q-2 The lenses of our reading glasses are made of

(i)

Opaque material

(ii)

Transparent material

(iii)

Translucent material

(iv)

Both (b) and (c)
Q-3 We cannot see the Sun through a bent pipe, it indicates that:

(i)

The Sun has not risen

(ii)

Light from the Sun does not bend

(iii)

The observer is standing in shade

(iv)

The pipe has air
Q-4 Formation of shadows indicates that -

(i)

Light is not a visible form of energy.

(ii)

Light travels in a straight line.

(iii)

Shadows can be formed by all kinds of objects.

(iv)

Shadows absorb all the light.
Q-5 Which of the follow is true for shadow of a tree in the open ground?

(i)

The shadow of the tree will always remain stationary.

(ii)

The size of the shadow will remain constant.

(iii)

The colour of the shadow will remain green.

(iv)

The size and position of the tree’s shadow can change

Q-6 Which of the following is not a property of the image formed in a pinhole camera?

(i)

It in smaller in size.

(ii)

It is inverted.

(iii)

It has the same colours as the object.

(iv)

It is of the same size as the object.

Q-7 Why inverted images are formed in a pinhole camera?

(i)

There is automatic inversion of image in the camera.

(ii)

A lot of light from the object has to stay outside the pinhole.

(iii)

Because light travels in a straight line.

(iv)

Because usually the camera are small.
Chapter-6   Magnetism
Q-1 State True or False and correct the false statements giving reasons
(1) A button shaped magnet will have only one pole.
(2) A horseshoe magnet must be stored in pairs.
(3) A freely suspended magnet is affected by the Earth’s magnetic field.
(4) A compass can tell us the east west direction also.
(5) The north pole of a magnetic compass points to the geographic south pole.
(6) A magnet can attract only a magnetic substance.
(7) If a broken magnet is freely suspended it will not show north –south direction.
(8) Magnetic keepers are pieces of rubber.
(9) Hammering a magnet, improves its magnetic properties.
(10) When steel is magnetized by induction it does not lose its magnetism quickly.
Q-2 Fill in the blanks
(1) The magnetic materials other than iron are ____________ and ____________.
(2) Name of a natural magnet is ____________.
(3) A compass has a ____________ in it.
(4) Magnetic poles that repel each other are ____________ and ____________.
(5) Even a broken magnet will have ____________ poles.
(6) Different types of poles of a magnet are called ____________ poles.
(7) When magnetism is induced the near end of the iron piece develops ____________ pole.
(8) If iron pins are sprinkled on a magnet most pins will stick to the ____________.
(9) Electromagnets are used in ____________.
(10) Bar magnets are always stored in ____________.
Q-3 Short answer type questions
(1) Where are the poles in a magnet located?
(2) Name two items in your home that has a magnet in it.
(3) Your pencil, sharpener which has a plastic body is attracted by a magnet. How?
(4) What is the area of influence of a magnet called?
(5) What is the directive property of a magnet?
(6) Write any three uses of magnets.
(7) Why are artificial magnets preferred over natural magnets?
(8) How do we know that the Earth has magnetic property?
(9) How can we increase the magnetic property of an electromagnet?
(10) What happens when a magnet is brought near a freely suspended magnet?
Q-4 Long answer type questions
(1) When you dip a bar magnet into a mixture of sand and iron filings, iron filings cling to the poles only. Can you explain why?
(2) Differentiate between magnetic and non-magnetic materials.
(3) Write any three properties of magnets and how the properties are useful?
(4) If you find a magnet whose poles are not written on it; how can you find its north pole?
(5) How can we say that magnetism is a contact as well as a non-contact force?
(6) Prove that maximum magnetic power resides in the poles of a magnet?
(7) Explain how and why magnets should be stored carefully?
(8) Explain a process of making an artificial magnet from a bar of iron.
(9) Explain how will you ascertain that a piece of iron is a magnet?
(10) How can a magnet lose its magnetism?
Q-5 Match the column
Multiple Choice Questions
Q-1 Which of the following is not a Ferromagnetic material?

(i)

Cobalt

(ii)

Iron

(iii)

Nickel

(iv)

Gold
Q-2 The magnetic property of magnets is minimum in the –

(i)

Side

(ii)

Ends

(iii)

Top

(iv)

Middle
Q-3 A freely suspended magnet comes to rest in

(i)

East-North direction

(ii)

East-West direction

(iii)

North-East direction

(iv)

South-North direction
Q-4 Which of the following statement is correct?

(i)

Magnets can exercise their attractive property through glass.

(ii)

Very strong magnets can actually attract substances like cardboard.

(iii)

Electromagnets can be made from any metal at the core.

(iv)

A broken magnet has only one pole.
Q-5 When an artificial magnet is made without touching, the process is called

(i)

Electrical method

(ii)

Induction method

(iii)

Double touch method

(iv)

Single touch method
Q-6 Like poles of two magnets will always

(i)

Repel

(ii)

Slide past

(iii)

Attract

(iv)

Contract
Q-7 On which of the following property the functioning of compass is based?

(i)

Attractive property

(ii)

Directive property

(iii)

Repulsive property

(iv)

Cooling property
Q-8 When we hit a magnet with a hammer -

(i)

It is demagnetised

(ii)

Its magnetic property increases

(iii)

There is no change in the magnet

(iv)

North pole becomes South pole
Q-9 In double touch method of making a magnet.

(i)

Only one magnet is used for rubbing the iron bar

(ii)

The magnets are not lifted high up after rubbing the iron bar.

(iii)

The magnets are lifted high up after rubbing the iron bar.

(iv)

The magnets used for rubbing have the same pole together.
Q-10 In an electromagnet when the current enters the coil in clockwise direction the end of the soft iron becomes :

(i)

the north pole

(ii)

the south pole

(iii)

depends upon the material of the core

(iv)

depends upon the current strength in the coil