class-4 / worksheet / animal with ears

ARMY PUBLIC SCHOOL, GOLCONDA

UNIT-8 ANIMALS WITH EARS

WORKSHEET---E.V.S

    1.     (a) Name two animals whose ears can be seen

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(b) Name two animals which have ears which cannot be seen

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(c) Name two animals which have hairs on their skin

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(d) Name two animals which do not have hair on their skin

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(e) Name two animals which have fur on their skin

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(f) Name any two animals which give birth to young ones

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(g) Name any two animals which lay eggs

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     2. Write True or False-

   1. All animals have ears that can be seen                                [           ]

   2. Lizards have tiny holes on their heads                                [           ]

   3. Cows and buffaloes do not have hair on their body            [           ]

   4. Animals with hair and ears that can be seen, lay eggs          [          ]

      3.     Classify the animals according to types of ears present--internal or external

Fox, Elephant, Sparrow, Pigeon, Peacock, Cat, Duck, Lizard, Cow, Mouse, Camel, Pig, Frog, Buffalo, Hen

      Internal ear animals-

      external ear animals-

      4.  Answer the following questions-

   (a) Why do animals need ears?

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  (b) How do birds hear?

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  (c) Why do animals have different patterns on their body?

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CLASS 9 / SCIENCE / LAST YEAR QUESTION PAPERS

              

 Hello Everyone,
Uploading  S.A.1 / SCIENCE / LAST YEAR'S QUESTION PAPERS for practice and to have an idea how the upcoming examination would be.
Kindly have a look and go ahead with your preparation accordingly.

NOTE - THESE PAPERS ARE FOR ELEMENTARY IDEA ONLY. THE ACTUAL S.A.1 EXAMINATION MAY HAVE VARIATIONS.

 SAMPLE PAPER-1

 SAMPLE PAPER-2

CLASS 9 / SCIENCE / SYLLABUS / S.A.1

Hello everyone,

The SCIENCE syllabus on which the upcoming TERM-END-1 EXAMINATION i.e. S.A.1. assessment would be done is as follows-
NOTE - SCIENCE INCLUDES PHYSICS, CHEMISTRY, BIOLOGY AND PRACTICALS

CLASS 9 / SCIENCE / SYLLABUS / S.A.1

First Term Units

Unit I: Matter - Nature and Behaviour

Definition of matter; solid, liquid and gas; characteristics - shape, volume, density; change of state-melting (absorption of heat), freezing, evaporation (cooling by evaporation), condensation, sublimation.

Nature of matter: Elements, compounds and mixtures. Heterogenous and homogenous mixtures, colloids and suspensions.

Unit II: Organization in the Living World

Cell - Basic Unit of life: Cell as a basic unit of life; prokaryotic and eukaryotic cells, multicellular organisms; cell membrane and cell wall, cell organelles; chloroplast, mitochondria, vacuoles, endoplasmic reticulum, Golgi apparatus; nucleus, chromosomes - basic structure, number. 

Tissues, Organs, Organ System, Organism: Structure and functions of animal and plant tissues (four types in animals; meristematic and permanent tissues in plants).

Unit III: Motion, Force and Work

Motion: Distance and displacement, velocity; uniform and non-uniform motion along a straight line; acceleration, distance-time and velocity-time graphs for uniform motion and uniformly accelerated motion, equations of motion by graphical method; elementary idea of uniform circular motion.

Force and Newton's laws: Force and motion, Newton's laws of motion, inertia of a body, inertia and mass, momentum, force and acceleration. Elementary idea of conservation of momentum, action and reaction forces.

Gravitation: Gravitation; universal law of gravitation, force of gravitation of the earth (gravity), acceleration due to gravity; mass and weight; free fall.

Unit V: Food Production

Plant and animal breeding and selection for quality improvement and management; use of fertilizers, manures; protection from pests and diseases; organic farming.

First Term Practicals

# 1. To test (a) the presence of starch in the given food sample, (b) the presence of the adulterant metanil yellow in dal.

# 2. To prepare:

• a) a true solution of common salt, sugar and alum
• b) a suspension of soil, chalk powder and fine sand in water
• c) a colloidal solution of starch in water and egg albumin/milk in water and distinguish between these on the basis of
  • transparency
  • filtration criterion
  • stability

# 3. To prepare

• a) a mixture
• b) a compound

using iron filings and sulphur powder and distinguish between these on the basis of:

• i. appearance, i.e., homogeneity and heterogeneity
• ii. behaviour towards a magnet
• iii. behaviour towards carbon disulphide as a solvent
• iv. effect of heat

# 4. To carry out the following reactions and classify them as physical or chemical changes:

• a. Iron with copper sulphate solution in water
• b. Burning of magnesium in air
• c. Zinc with dilute sulphuric acid
• d. Heating of copper sulphate
• e. Sodium sulphate with barium chloride in the form of their solutions in water

# 5. To prepare stained temporary mounts of (a) onion peel and (b) human cheek cells and to record observations and draw their labeled diagrams.

# 6. To identify parenchyma and sclerenchyma tissues in plants, striped muscle fibers and nerve cells in animals, from prepared slides and to draw their labeled diagrams.

# 7. To separate the components of a mixture of sand, common salt and ammonium chloride (or camphor) by sublimation.

# 8. To determine the melting point of ice and the boiling point of water.

# 9. To establish relationship between weight of a rectangular wooden block lying on a horizontal table and the minimum force required to just move it using a spring balance.

# 10. To determine the mass percentage of water imbibed by raisins.

CLASS 5 / E.V.S / SYLLABUS / S.A.1

Hello everyone,

The syllabus on which the upcoming TERM-END-1 EXAMINATION i.e. S.A.1. assessment would be done is as follows-

CLASS 5 / E.V.S / SYLLABUS / S.A.1

          Ø CHAPTER-2-DIFFERENT PEOPLE

          Ø CHAPTER-4-ORGAN SYSTEM

          Ø CHAPTER-5-DIGNITY OF LABOUR

          Ø CHAPTER-8-PLANT LIFE

          Ø CHAPTER-9-FOREST NATURAL RESOURCES

          Ø CHAPTER-11-FOOD FOR PLANT 

CLASS 4 / E.V.S / SYLLABUS / S.A.1

Hello all,

As exam time is near u all must be curious about the syllabus which is supposed to be asked in upcoming TERM-END-1 EXAMINATION i.e. S.A.1.

Here is the solution- CLASS 4 / E.V.S / SYLLABUS / S.A.1

          Ø CHAPTER-1-MY FAMILY

          Ø CHAPTER-8-ANIMALS WITH EARS

          Ø CHAPTER-9-PLANT LIFE

          Ø CHAPTER-10-HONEY FROM FLOWERS

          Ø CHAPTER-12-FOOD AND NUTRITION

CHAPTER-10-----GRAVITATION

CLASS -9                                                      PHYSICS

CHAPTER – 10

GRAVITATION

# GRAVITATION: 

è  Gravitation is the force of attraction between two objects in the universe.

Eg: - Attraction between the earth and moon.

Attraction between the sun and planets.

# GRAVITY: 

è Force of attraction between earth and objects lying on or near the surface of the earth.

Eg: - If a body is dropped from a certain height, it falls downwards due to earth’s gravity.      

# CENTRIPETAL FORCE

è When a body moves in a circular path, it changes its direction at every point. This causes change in velocity and involves acceleration. This acceleration is because of the force which keeps the body in the circular path acts towards the centre of the circle. This force is called CENTRIPETAL FORCE and the corresponding acceleration is CENTRIPETAL ACCELERATION

è  If there is NO centripetal force, the body will move in a straight line along the tangent to the circular path.

# UNIVERSAL LAW OF GRAVITATION:-

è The universal law of gravitation states that, ‘every object in the universe attracts every other object with a force which is directly proportional to product of the masses (M and m₎ and inversely proportional to the square of the distance (d) between them.’

^è   F α M x m   and    F α 1/d²

  Combining the two - F α M x m / d²

             Or F = G M m / d²

è where G is a constant of proportionality called  UNIVERSAL GRAVITATION CONSTANT.  

è The SI unit of G is N m² kg ^-2  and its value is  6.673 x 10^-11 N m² kg ^-2

# IMPORTANCE OF THE UNIVERSAL LAW OF GRAVITATION

è  This law explained

o   The force that binds us to earth.

o   Motion of moon around the earth

o   Motion of planets around the sun.

# FREE FALL

è When the object falls freely under the influence of gravitational force alone, then the object is free fall.

è While falling there is no change in direction but velocity changes and involves acceleration. This acceleration is due to the earth’s gravitational force. Thus this acceleration is called THE ACCELERATION DUE TO GRAVITY ‘g’.

è From the second law of motion, force is the product of mass and acceleration.    

  F = ma

 For free fall, force is the product of mass and acceleration due to gravity.                       

  F = mg  

  m g = G  M x m/d²

  g = G m/d² 

Where M is the mass of the earth and d is the distance between the object and the earth.

For objects near or on the surface of the earth d is equal to the radius of the earth R 

   mg = G M x m/ R²     or  g =  G M/ R²

è The value of  g is  9.8 ms ^-2. .

è The value of ‘g’ becomes greater at poles than at equators.

è All the objects whether they are hollow or solid, big or small should fall at the same rate (in absence of air resistance). Because ‘g’ is independent of mass.

è Equation of motion of free fall object:

o   v = u + gt

o   v² – u² = 2gh

o   h = ut + gt²

               2

# MASS

è The mass of a body is the measure of its inertia or mass can be defined as amount of matter contained in body.

è If the mass of a body is more its inertia is more.   

è The mass of a body is constant and does not change from place to place.   

è The SI unit of mass is kg.

è It is a vector quantity.

# WEIGHT

è The weight of a body is the force with which the earth attracts the body.

è The force with which a body is attracted by the earth depends on its mass m and acceleration due to gravity g.

F = m g

Since weight of a body is the force with which the earth attracts the body, 

W = m g

è  Since g at a place is constant , W α  m

è The weight of a body changes from place to place.

è The SI unit of weight is the same as force – Newton (N).

è It is a vector quantity.

# WEIGHT OF THE OBJECT ON THE MOON

è The weight of an object on the earth is the force with which the earth attracts the object and the weight of an object on the moon is the force with which the moon attracts the object.

è The mass of the moon is less than the mass of the earth. So the moon exerts lesser force on the objects than the earth. Thus the weight of the object on moon is less.

è  The weight of an object on the moon is one sixth (1/6^th) of its weight on the earth.

è Let the mass of an object be ‘m’ and its weight on moon is W_m , then by universal law of gravitation

Its weight on the earth will be

W_e = G  m M / R² where, M is the mass of the earth, and R its radius

      = 1.474 x 10¹¹ x G x m

and the weight on the moon is: Wm = G  m Mm / Rm² 

Dividing the two weights W_m/W_e, we get

= 1 / 6

Thus, W_m = W_E / 6