to evs class class v evs presented by:- virender singh verma
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TO EVS CLASS
CLASS VEVS
presented by:-
Virender Singh VermaVirender Singh Verma
Our Sensesand our
environment
The 7 characteristics of Living Things
Movement – Animals move to find food and keep away from predators, plants move to face the light
Reproduction – the ability to produce offspring to keep the species in existence
Sensitivity – responding and reacting to the environment
Nutrition – Animals need food for respiration, plants need minerals from the soil
Excretion – Getting rid of waste
Respiration – Turning food into energy
Growth – Growing larger and stronger becoming adult size
Sensitivity – responding and reacting to the change in environment is called stimulus.Change in environment is called stimuli
- One of the common characteristic is that living things can detect stimuli and react to them.
- To do this, living things must be able to detect changes in the environment or stimuli
What are the senseorgans that detectdifferent stimuli?
(Sight)(Hearing)
(Taste)
(Smell)
(Touch)
5 sense organs in humans5 sense organs in humans
EyeEye
TongueTongue
EarEar
SkinSkin
NoseNose
Which sense organ helps Mrs Wong to hear the
phone call?
Which sense organ helps Mrs Wong to hear the
phone call?
Why can Lily detect the burning smell?
Why can Lily detect the burning smell?
Which sense organ does Jimmy use to
detect the taste of the banana?
Which sense organ does Jimmy use to
detect the taste of the banana?
How Grandfather knows the tea is
hot?
How Grandfather knows the tea is
hot?
Look at the following diagram and see how important our senses are.Look at the following diagram and see how important our senses are.
1 Helps us avoid danger.
E.g. Lily can smell smoke from a fire.Grandfather can sense that the teais hot.
Importance of sensing the environmentImportance of sensing the environment
2 Helps us detect messages and communicate.
E.g. Mrs Singh can hear people talk.
3 Offers us feelings.E.g. Julie can taste and smell the food and watch TV.
Mr. Singh can see obstacles in frontof him.
For other animals, sense organs
help them avoid danger,
find food and shelters...
- Each kind of sense organ has its own sensory cells Different kinds of sensory cells detect different kinds of stimuli.
p.66
detects sound
EarEar
detects light
EyeEye
detects taste
tonguetonguedetects temperature,touch, pressure andpain
SkinSkin
detects smell
NoseNose
- When a sense organ detects a stimulus, a message will be sent to the brain.
- The brain interprets and analyzes the message and a sense will be produced.
Special methods used by other animals to sense the environment
Special methods used by other animals to sense the environment
p.66
How do other animals like snakes, honey bees, mosquitoes and fish sense the
environment?
Find this out from the library or the internet.
Find this out from the library or the internet.
How would you distinguish between the following pairs of objects?
Check-point 1 p.67
1 Soy sauce and vinegar
EyeEye
EarEar
TongueTongue
NoseNose
SkinSkin
EyeEye
EarEar
TongueTongue
NoseNose
SkinSkin
2 Flute and tambourine
EyeEye
EarEar
TongueTongue
NoseNose
SkinSkin
3 Iced lemon tea and hot lemon tea
4 Rs 5 coin and Rs.2 coinEyeEye
EarEar
TongueTongue
NoseNose
SkinSkin
5 Grey sock and white sock
EyeEye
EarEar
TongueTongue
NoseNose
SkinSkin
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