Human Body
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Food and Digestion
SubtopicFood and Digestion under Human Body for Grade 4 ICSE.
Preview questions (no answers)
- 1.
Which vitamin helps in the clotting of blood after an injury?
A.Vitamin K
B.Vitamin A
C.Vitamin C
D.Vitamin B
- 2.
Where does the food go immediately after leaving the mouth?
A.Stomach
B.Small Intestine
C.Oesophagus
D.Large Intestine
- 3.
Which method is used to cook 'Idli'?
A.Roasting
B.Frying
C.Baking
D.Steaming
- 4.
Which of these is NOT a nutrient but is very important for our body to function?
A.Water
B.Carbohydrates
C.Proteins
D.Fats
- 5.
Which of these is a benefit of boiling food?
A.It adds extra fats to the food
B.It kills germs and makes food soft and easy to digest
C.It increases the amount of roughage
D.It makes the food crispy
- 6.
What do we call the substances present in food that are needed by our body to grow and stay healthy?
A.Ingredients
B.Nutrients
C.Microbes
D.Particles
- 7.
Which substance in the mouth starts the chemical digestion of carbohydrates?
A.Water
B.Saliva
C.Bile
D.Acid
- 8.
Study the flowchart representing the digestion of a specific nutrient 'N' as it moves through the digestive system. Based on where the breakdown begins and ends, which nutrient is most likely being represented?
A.Nutrient 'N' is a Vitamin, because vitamins are only absorbed after being broken down in the stomach.
B.Nutrient 'N' is a Carbohydrate, because carbohydrates skip the mouth and start digesting in the stomach.
C.Nutrient 'N' is a Protein, because its chemical digestion starts in the stomach rather than the mouth.
D.Nutrient 'N' is Roughage, because it must be partially broken down in the stomach before moving to the intestine.
- 9.
A student set up an experiment with two test tubes, 'X' and 'Y', as shown in the diagram. Both tubes were kept at room temperature for 30 minutes before iodine solution was added to each. Which tube will NOT show a blue-black color change, and why?
A.Tube Y, because starch only reacts with saliva and does not react with iodine solution.
B.Tube X, because saliva has converted the starch in the bread into sugar, which does not turn blue-black.
C.Both tubes, because iodine solution only changes color when it comes into contact with fats or proteins.
D.Tube X, because bread does not contain any starch unless it is mixed with water in Tube Y.
- 10.
What is the outcome of the process of digestion?
A.Conversion of food into air
B.Breakdown of complex food into simple, soluble forms that the body can use
C.Storage of food in the liver forever
D.Conversion of nutrients into bones
Download the worksheet for Human Body - Food and Digestion to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
Which type of teeth are used to crack hard food items like nuts?
A.Incisors
B.Canines
C.Premolars
D.Wisdom teeth
- 2.
Which layer of the tooth acts as a protective shield for the soft pulp inside?
A.Gums
B.Dentin
C.Root
D.Saliva
- 3.
Besides eating, what is another important function of our teeth?
A.Helping us breathe
B.Helping us speak clearly
C.Helping us hear
D.Helping us blink
- 4.
If a permanent tooth is lost due to an accident or decay, will a new natural tooth grow in its place?
A.Yes, always
B.Only in children
C.No, it will not grow back
D.Yes, after 10 years
- 5.
How many sets of teeth does a human being naturally grow during their lifetime?
A.One
B.Three
C.Four
D.Two
- 6.
Which layer of the tooth is most likely to be sensitive to very hot or cold liquids if the enamel is worn out?
A.The Gums
B.The Dentine
C.The Jawbone
D.The Crown
- 7.
Which teeth are primarily used for cracking hard food like nuts?
A.Incisors
B.Canines
C.Premolars
D.Wisdom teeth
- 8.
Study the diagram showing the arrangement of teeth in one quadrant (one-fourth) of an adult jaw. 'Group 1' consists of the teeth that replaced the temporary milk teeth. 'Group 2' consists of the teeth that grow into new spaces at the back of the mouth where no teeth existed during childhood. Based on this, what is the total number of 'Group 2' teeth found in the entire mouth of a healthy adult?
A.8 teeth
B.12 teeth
C.4 teeth
D.20 teeth
- 9.
If the pulp of a tooth is infected, what is the most likely consequence?
A.The enamel will grow thicker.
B.The tooth will lose its blood supply and may die.
C.The tooth will turn into a canine.
D.The gums will become harder.
- 10.
What is the main difference between the premolars of a child (milk teeth) and an adult?
A.A child's premolars are sharper.
B.Children do not have premolars in their milk teeth set.
C.Adult premolars have no roots.
D.A child has 8 premolars while an adult has 4.
Download the worksheet for Human Body - The Human Teeth to practice offline. It includes additional chapter-level practice questions.
Digestive System Functions
SubtopicDigestive System Functions under Human Body for Grade 4 ICSE.
Preview questions (no answers)
- 1.
What is the total number of premolars in an adult mouth?
A.4
B.8
C.12
D.16
- 2.
Which of these should be avoided to prevent tooth decay?
A.Apples
B.Milk
C.Sticky sweets and chocolates
D.Water
- 3.
What is the part of the tooth that is hidden inside the gums?
A.Crown
B.Enamel
C.Root
D.Dentin
- 4.
What happens if we do not chew our food properly?
A.Digestion becomes easier
B.The stomach has to work harder
C.Food becomes more nutritious
D.Teeth become sharper
- 5.
What is the final stage of the digestive process?
A.Chewing food in the mouth.
B.The churning of food in the stomach.
C.The removal of undigested waste from the body.
D.The mixing of food with bile.
- 6.
The small intestine receives digestive juices from which two organs?
A.Liver and Pancreas
B.Stomach and Heart
C.Lungs and Kidneys
D.Mouth and Oesophagus
- 7.
Why do doctors advise us to eat at regular intervals?
A.To keep the digestive system active and prevent acidity.
B.To make the food pipe grow longer.
C.To help the teeth grow stronger.
D.To change the color of the blood.
- 8.
How does the digestive system handle the parts of food that cannot be digested, such as certain plant fibers?
A.It turns them into liquid and sends them to the kidneys
B.It passes them into the large intestine to be expelled as feces
C.It stores them in the liver forever
D.It converts them into vitamins in the stomach
- 9.
Which of these is the most accurate description of the stomach's shape and structure?
A.A long, thin tube about 20 feet long
B.A J-shaped muscular bag that can expand
C.A small, round organ located inside the liver
D.A flat, leaf-like structure behind the lungs
- 10.
What is the role of 'intestinal juices' produced by the walls of the small intestine?
A.To protect the stomach from acid
B.To complete the digestion of carbohydrates, proteins, and fats
C.To turn food back into a solid bolus
D.To help the lungs breathe better
Download the worksheet for Human Body - Digestive System Functions to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
What is the function of the canines?
A.Biting
B.Tearing
C.Grinding
D.Crushing
- 2.
Which of these should we do to keep our teeth healthy?
A.Brush once a week
B.Visit the dentist every 6 months
C.Eat a lot of sticky candy
D.Rinse mouth with soda
- 3.
Which type of teeth is missing in the milk teeth set?
A.Incisors
B.Canines
C.Premolars
D.Molars
- 4.
What provides the sensation of pain in a tooth when a cavity reaches the center?
A.Enamel
B.Dentin
C.Nerves in the pulp
D.Gums
- 5.
What is the total number of molars (including wisdom teeth) in a full permanent set of teeth?
A.8
B.10
C.12
D.16
- 6.
At approximately what age do children usually begin to lose their milk teeth?
A.2 years old
B.6 years old
C.12 years old
D.15 years old
- 7.
What is the primary role of the gums in the mouth?
A.To help in grinding food
B.To produce saliva
C.To hold the teeth firmly in place and protect the roots
D.To taste the food we eat
- 8.
Which of the following correctly describes the relationship between 'Enamel' and 'Dentin' regarding their physical properties?
A.Dentin is harder than enamel
B.Enamel is harder than dentin, but dentin forms the larger part of the tooth
C.Both have the same hardness and are made of the same material
D.Enamel is found inside the dentin
- 9.
In the human dental formula, the ratio of Incisors to Canines in one half of one jaw is 2:1. If a person has 2 canines in the upper jaw, how many incisors do they have in the upper jaw?
A.2
B.4
C.6
D.8
- 10.
Why is 'Plaque' described as a 'biofilm' by scientists?
A.Because it is a thin, sticky layer made of living bacteria and their waste
B.Because it is a film used to take pictures of teeth
C.Because it is made of plastic
D.Because it only grows on the roots of the teeth
Download the worksheet for Human Body - Care of Teeth to practice offline. It includes additional chapter-level practice questions.