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Download 6th Class General Science Notes (Unit-2) for Islamabad Model Schools / Colleges

Download 6th Class General Science Notes (Unit-2) for Islamabad Model Schools / Colleges

Very Easy, Updated & Comprehensive Notes for all types of students i.e. Average / Extra Ordinary

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Download 6th Class General Science Notes (Unit-2) for Islamabad Model Schools / Colleges


SHORT QUESTIONS

How do we get different smells?
Nose responds to smell and gives us our sense of smell.
[Very Important] What is the difference between rods and cones of retina?
·        Rods are sensitive to light of low intensity
·        Cones are sensitive to colored light
[Important] Name the four types of sensors of human skin?
i)            Pain sensors 
ii)           Temperature sensors
iii)         Touch sensors
iv)         Pressure sensors
If you eat food that is sweet and sour. Why do you notice sweetness first?
We notice sweetness first because sweet buds are present on the tip of tongue.
[Important] How do the senses of smell and taste help us?
·        Sense of smell helps us to differentiate between different smells present in air.
·        Sense of taste helps us to taste different food flavors.
Where are the taste buds located on the tongue?
Taste buds are present on the upper side of tongue.
[Very Important] Write three functions of skin?
·        It protects the internal organ system.
·        It maintains the temperature of body.
·        It responds to different stimulus of touch, temperature and pressure etc.
[Very Important] What will happen if there is no skin on our body?
·        Internal organs will be destroyed.
·        Normal body temperature could not be maintained.
·        We cannot feel stimulus of touch, temperature and pressure etc.
What will happen if you have only one eye?
It will be difficult to get a peripheral view with one eye.
What problem you may face if you have one ear instead of two?
We cannot keep our balance if we have one ear.
[Important] What will happen if retina becomes detached?
It is most important part of eye. Image is formed on it. So if retina becomes detached, we cannot see anything.


LONG QUESTIONS

[Important] Describe the structure and functions of taste buds?
Structure:
Taste buds are spherical structure. They have taste pores and taste hair.
Functions:
Taste buds send a message to brain regarding taste. Brain tells us about what kind of food we are eating.

[Important] Describe the structure and functions of the human ear?
Structure:
·        Ear is divided into three parts. Outer Ear, Middle Ear and Inner Ear.
·        Outer ear has a funnel like structure called pinna and an S shaped tube called ear canal.
·        Middle ear consists of ear drum and three tiny bones called hammer, anvil and stirrup.
·        Inner ear consists of three semicircular canals and cochlea. It has tiny hair cells and auditory nerve.
Function:
·        Pinna sends the sound waves to ear drum.
·        Ear drum sends the vibrations of sound to three tiny bones.
·        Vibration in oval window causes the fluid of cochlea to vibrate.
·        Movement of fluid sent to hairs, which send the message to brain.
·        Brain recognizes these message as sound.

[Very Important] Describe the structure of an eye?
·        Each eye has two eyelids.
·        Outmost portion of eye is whitish and called sclera
·        Second layer of eye is called choroid.
·        Iris is colored and circular disc shape. It has pupil.
·        Behind pupil a biconvex lens is present.
·        Inner most layer of eye is called retina.
·        Lens divides the eyeball into two chambers called aqueous humour and vitreous humour.

How is an image formed on the retina?
·        Light enters in eye through cornea.
·        It passes through lens and focused on retina.
·        Image formed on retina is inverted.
·        The rods and cons send the message to brain through optic nerve.
·        Brain interprets the image and we see the upright image.

[Very Important] Describe the structure and functions of human skin?
Structure:
·        Two main parts of skin are epidermis and dermis.
·        Four types of sensors are present in skin. They are pain sensors, touch sensors, pressure sensors and temperature sensors.
Functions:
·        It protects the internal organ system.
·        It maintains the temperature of body.
·        It responds to different stimulus of touch, temperature and pressure etc.



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Download Class Notes: Download 6th Class General Science Notes (Unit-2) for Islamabad Model Schools / Colleges
Download 6th Class General Science Notes (Unit-2) for Islamabad Model Schools / Colleges
Download 6th Class General Science Notes (Unit-2) for Islamabad Model Schools / Colleges
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