Class 4 Science Chapter 1 Test 3 Updated: 11 Jun 2022 666 Welcome to your Class 4 Science Chapter 1 Test 3 1. Lungs are surrounded by _______ Ribs Skull Brain None of these 2. There are __________ bones in the human skeleton. 106 206 306 None of these 3. The exchange of oxygen between blood and air takes place in the _______. Lungs Brain Stomach All of these 4. During breathing air enters in our lungs through______ Nose Wind pipe Stomach Both a & b 5. All the bones are united with one another at the joints forming a frame called ________. Brain Skull Skeleton Lungs 6. The bones of our arm and legs are __________. Hollow Open Closed None of these 7. ________ protect and support body parts. Brain Skull Skeleton Lungs 8. There are ________ types of human teeth. 2 3 4 5 9. Tiger has large ____________ Incisors Canines Premolar Molar 10. Premolar and molar teeth are used for: Biting and cutting Piercing and tearing Chewing and grinding None of these 11. The function of ribs is to protect __________ Lungs Brain Stomach All of these 12. Rat uses its _________ for biting food or killing prey. Incisors Canines Premolar Molar 13. During breathing air enters in our _______ Lungs Brain Stomach All of these 14. The function of skull is to protect __________ Lungs Brain Stomach All of these 15. When we inhale air, the lungs _______ Contract Expand Both a & b None of these Please fill in the comment box below. Time's up
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