Science Practice Quiz 145

Q1.How often should one clean their teeth with a brush or datun and dental floss to prevent tooth decay?

A. Once a day. B. At least twice a day. C. Only after consuming sweets. D. Once a week.

Q2.What is stated about the normal presence of bacteria in our mouth?

A. They are always harmful and cause infections. B. They are normally present but not harmful. C. They are only present if oral hygiene is poor. D. They help in breaking down proteins.

Q3.What is the primary purpose of dental floss?

A. To whiten teeth. B. To strengthen gums. C. To take out trapped food particles between teeth. D. To polish tooth enamel.

Q4.Where are the salivary glands located, according to the provided text?

A. In the stomach. B. In the small intestine. C. In the mouth. D. In the esophagus.

Q5.What is the primary function of the oesophagus in the human body, according to the provided text?

A. To carry air from nostrils to lungs. B. To digest food particles. C. To pass swallowed food into the stomach. D. To detect different tastes.

Q6.What can happen if food particles accidentally enter the windpipe?

A. Increased saliva production. B. Feeling choked, getting hiccups, or coughing. C. Enhanced sense of taste. D. Faster digestion of food.

Q7.How is food prevented from entering the windpipe during the act of swallowing?

A. The tongue pushes food directly into the stomach. B. A flap-like valve closes the passage of the windpipe. C. The oesophagus expands to block the windpipe. D. Air pressure guides the food away from the windpipe.

Q8.Which of the following statements accurately describes the windpipe?

A. It carries food from the mouth to the stomach. B. It runs adjacent to the foodpipe and carries air from the nostrils to the lungs. C. It is responsible for detecting different tastes. D. It is located only in the chest region.

Q9.What is a characteristic feature of the passage for air and food inside the throat?

A. They have completely separate passages. B. They share a common passage. C. Only food passes through the throat. D. Only air passes through the throat.

Q10.According to Activity 2.4, which sample would be used to identify the bitter taste regions of the tongue?

A. Sugar solution. B. Common salt solution. C. Lemon juice. D. Juice of crushed neem leaf or bitter gourd.

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Science Practice Quiz 145