CBSE Class 4 Science Food Worksheet Set 02

Question 1. Name the different types of nutrients present in the food.
Answer: The different types of nutrients present in food are carbohydrates, proteins, fats, vitamins, and minerals. In addition to these five main nutrients, our body also requires water and dietary fiber (roughage) to function properly.
In simple words: The five major nutrients in our food are carbohydrates, proteins, fats, vitamins, and minerals.

Exam Tip: Always remember that water and roughage are essential parts of a balanced diet even though they are not strictly classified as chemical nutrients.

Question 2. Who needs more protein - a child or an adult? Give reason.
Answer: A growing child needs more protein compared to an adult. Proteins are known as body-building foods. Since children are in their growing years, their bodies require a larger amount of protein to build new tissues, grow taller, and develop their muscles and organs. Adults mostly need protein only for the repair and maintenance of existing body tissues.
In simple words: Children need more protein because their bodies are growing rapidly and building new cells and tissues.

Exam Tip: Associate proteins with "body-building" and growth to quickly recall why children need higher quantities of them.

Question 3. Milk is called a complete food. Reason out.
Answer: Milk is called a complete food because it contains almost all the essential nutrients required by the body for proper growth and development. It is rich in proteins for body-building, fats and carbohydrates for energy, calcium and other minerals for strong bones and teeth, and essential vitamins.
In simple words: Milk contains proteins, fats, carbohydrates, vitamins, and minerals all in one food item, making it complete.

Exam Tip: Mention calcium and proteins specifically when explaining why milk is considered a complete food.

Question 4. Name some natural and artificial preservatives we add to the food.
Answer: Preservatives are substances added to food to prevent spoilage caused by microorganisms and to increase shelf life.

In simple words: Natural preservatives include salt and sugar, while artificial ones include chemical compounds like sodium benzoate used in packaged foods.

Exam Tip: Give common household examples like salt for pickles and sugar for jams when asked about natural preservatives.