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CHAPTER 7 Science Class 4

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CHAPTER 7
TEETH AND DIGESTION
CHECK POINT -1
NAME THE FOLLOWING:
1) Milk teeth
2) Pulp 3) Canines 4) Enamel
CHECK POINT -2
FILL IN THE BLANKS:
1) Cavity
2) Starch
3) Small intestine
4) Large intestine
PRACTICE TIME
A
TRUE/FALSE
1) False 2) True 3) True 4)True
B
TICK THE CORRECT ANSWES:
1) Milk teeth
2) 32 3) 0
4) Incisors
C FILL IN THE BLANKS:
1) Dentine
2) Enamel 3) Gums 4) Toothache
D QUESTION ANSWERS:
1) Difference between the milk teeth and permanent
teeth:
2) Incisors have a sharp biting action that cuts food into a
chewable-sized piece. Canines can help to grip and position
food (like an apple) before you bite down. They also assist in
tearing food. Premolars help to tear, split and break up food
before sending in down to the molars for grinding. Molars are
the workhorses in your mouth. They mash, grind, crush and
chew food with saliva and digestive enzymes until it is ready to
swallow. So in this way four types of teeth helps in digestion.
3) We should take care of our teeth with many ways:
a) We should eat food containing a lot of calcium and vitamin
Which help us to make our teeth strong and prevent tooth
decay.
b) Brush the teeth twice a day.
c) Move the brush both upwards and downwards
while brushing the teeth.
d) Rinse the mouth with clean water after every meal.
e) We should avoid too much sweets and soft drinks
which cause tooth decay.
4)
Path of food taken in the digestive teeth:
5) Diagram of four types of teeth:
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