CBSE Class 4 EVS Chapter Human Body and their Needs Worksheet Questions and Answers
Q.1 Dogs and cats have sharp pointed
(A) canines
(B) Molars
(C) Both
(D) none of these
Answer:
A
Q.2 Match the following:
| (A) | Incisors | (I) | cracking teeth |
| (B) | canines | (II) | cutting teeth |
| (C) | Premolars | (III) | Grinding teeth |
| (D) | Molars | (IV) | Tearing Teeth |
(A) (A - III), (B - I), (C - IV), (D - II)
(B) (A - IV), (B - III), (C - II), (D - I)
(C) (A - II), (B - I), (C - IV), (D - III)
(D) (A - II), (B - IV), (C - I), (D - III)
Answer:
d
Q.3 Number of milk teeth in humans is:
(A) 22
(B) 20
(C) 24
(D) 32
B
Q4. There are ____ permanent teeth in our mouth.
(A) 25
(B) 32
(C) 34
(D) 30
Answer:
B
Q5. Number of teeth in each jaw in humans:
(A) 18
(B) 14
(C) 16
(D) 20
Answer:
C
Q6. Which one statement among the following is not correct about incisors?
(A) There are 4 incisors in each jaw in humans.
(B) They are front teeth.
(C) They are cutting and biting teeth.
(D) They are crushing teeth.
Answer:
D
Q7. _______ are also known as teeth for tearing food.
(A) Canines
(B) Incisors
(C) Premolars
(D) Molars
Answer:
A
Q8. Molars are used for:
(A) Cutting and biting food.
(B) Tearing food.
(C) Cracking food.
(D) Grinding food.
Answer:
D
Q9. In humans there are ____ molars in each jaw.
(A) Six
(B) Two
(C) Four
(D) Three
Answer:
A
Q.10 These teeth are meant for cracking food.
(A) Incisors
(B) Premolars
(C) Canines
(D) Both (A) and (C)
Answer:
B
Q.11 Which one among the following is not a part of a tooth?
(A) Enamel
(B) Root
(C) Decay
(D) Neck
Answer:
C
Q.12 Hardest substance of human body is:
(A) Thigh bone
(B) Elbow bone
(C) Enamel
(D) Rib
Answer:
C
Q.13 The soft part of the tooth which has blood vessels is:
(A) Dentine
(B) Pulp
(C) Enamel
(D) Root
Answer:
B
Q.14 Which one among the following is a cause of tooth decay?
(A) Regular brushing.
(B) Eating food that are high in sugar.
(C) Flossing
(D) Visiting a dentist after every 6 months.
Answer:
B
Q.15 A sticky coating formed by bacteria on teeth is:
(A) Decay
(B) Enamel
(C) Plaque
(D) Saliva
Answer:
C
Q.16 Which is the most important mineral for healthy teeth?
(A) Iron
(B) Potassium
(C) Sodium
(D) Calcium
Answer:
D
Q.17 The vitamin which plays an important role in maintaining healthy teeth and gums is:
(A) Vitamin C
(B) Vitamin K
(C) Vitamin B
(D) Vitamin E
Answer:
A
Q.18 The outermost layer of teeth is:
(A) Dentine
(B) Enamel
(C) Pulp
(D) Root
Answer:
B
Q.19____ are disease causing microbes.
(A) Antibiotic
(B) Malaria
(C) Dysentery
(D) Germs
Answer:
D
Q.20 We should eat _____ diet.
(A) Unhealthy
(B) Improper
(C) Balanced
(D) All the above
Answer:
C
Q.21 Typhoid is caused by:
(A) Virus
(B) Bacteria
(C) Fungi
(D) Protozoa
Answer:
B
Q.22 Which one of the following is not a disease?
(A) Tuberculosis
(B) Typhoid
(C) Protozoa
(D) Malaria
Answer:
C
Q.23 Match the following:
| (A) | Fungi | (I) | Malaria |
| (B) | Bacteria | (II) | Polio |
| (C) | Protozoa | (III) | Ringworm |
| (D) | Virus | (IV) | Tuberculosis |
(A) (A- III), (B - II), (C - IV), (D - I)
(B) (A - III), (B- IV), (C - I), (D - II)
(C) (A - IV), (B - III), (C - II), (D - I)
(D) (A - II), (B - I), (C - IV), (D - III)
Answer:
B
Q.24 ____ is caused by virus.
(A) Malaria
(B) Ringworm
(C) Dengue
(D) Typhoid
Answer:
C
Q.26 This microbe helps in changing milk into curd.
(A) Virus
(B) Bacteria
(C) Fungi
(D) Protozoa
Answer:
B
Q.27 The microorganism which is used for making bread.
(A) Protozoa
(B) Fungi
(C) Bacteria
(D) Virus
Answer:
B
Q.28 Which one of the following is not a type of teeth?
(A) Canine
(B) Molar
(C) Incisor
(D) Plaque
Answer:
D
Q.29 Which one of the following statements is not correct about the microbes?
(A) Some microbes are harmful for us.
(B) Microbes can be seen by naked eyes.
(C) Microbes can be found everywhere.
(D) Microbes can grow inside or outside our body.
Answer:
D
Q.30 ____teeth are first set of teeth.
(A) Permanent
(B) Temporary
(C) Both (A) and (B)
(D) Either (A) or (B)
Answer:
B