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Science Olympiad (NSO) Olympiad Science — practice questions — page 2

Explore 60 free Olympiad Science questions in Science Olympiad (NSO) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Olympiad Science questions and exercises with answers

Showing questions 31–60 of 60.

A student drops iodine on a potato slice and it turns blue black. The slice has:Read the answer and worked solution →Cooked dal shaken with the test solution turns violet. The dal contains:Read the answer and worked solution →A groundnut crushed in paper leaves an oily patch. The groundnut contains:Read the answer and worked solution →A boy eats rice before a long cycle ride for quick energy. Rice is rich in:Read the answer and worked solution →For the same weight, butter gives far more energy than sugar because fats give:Read the answer and worked solution →Carbohydrates and fats are grouped together in charts as the:Read the answer and worked solution →A growing child is fed eggs and dal daily to build her body. These supply:Read the answer and worked solution →Because they build and repair the body, proteins are nicknamed the:Read the answer and worked solution →A doctor adds fruit to a diet to guard against illness. Fruit is rich in:Read the answer and worked solution →A child is given carrots to keep his eyesight sharp. Carrots are rich in:Read the answer and worked solution →A nurse advises amla and oranges to help the body fight infections. These carry:Read the answer and worked solution →A baby is placed in morning sunlight so her body can use calcium. Sunlight gives:Read the answer and worked solution →Milk is served to children to harden their bones and teeth. Milk supplies:Read the answer and worked solution →Compared with carbohydrates, the amount of minerals a body needs each day is:Read the answer and worked solution →Salad and whole grains add bulk that helps waste pass out. This part of food is:Read the answer and worked solution →A dietician notes that roughage itself supplies the body with:Read the answer and worked solution →Fresh vegetables and whole grains are the main sources of:Read the answer and worked solution →A patient is told to drink more water because water helps the body to:Read the answer and worked solution →A meal plan has every nutrient in the right amount plus roughage and water. It is a:Read the answer and worked solution →A child eats far more fat than he needs for years. He is likely to develop:Read the answer and worked solution →A worker eats polished rice only for years and develops beri beri. He lacks a:Read the answer and worked solution →A family is taught that scurvy, rickets and night blindness are all prevented by a:Read the answer and worked solution →Catch the nutrientsRead the answer and worked solution →Pop the food testsRead the answer and worked solution →Run the nutrient gatesRead the answer and worked solution →Slice the nutrientsRead the answer and worked solution →Energy or buildingRead the answer and worked solution →Sort the food partsRead the answer and worked solution →Type the numberRead the answer and worked solution →Food bingoRead the answer and worked solution →

Worked practice questions

A student drops iodine on a potato slice and it turns blue black. The slice has:

  1. Starch
  2. Fibre
  3. Water
  4. Fats
Show answer and solution

Correct answer: A. Starch

1. Iodine gives a blue black colour only with starch. 2. The potato slice showed that colour. 3. So the slice contains starch. _Source: syllabus Science Class VI, Chapter 2, Components of Food._

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Cooked dal shaken with the test solution turns violet. The dal contains:

  1. Minerals
  2. Protein
  3. Roughage
  4. Vitamins
Show answer and solution

Correct answer: B. Protein

1. A violet colour in the test tube marks one nutrient. 2. That nutrient is protein. 3. So the dal contains protein. _Source: syllabus Science Class VI, Chapter 2, Components of Food._

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A groundnut crushed in paper leaves an oily patch. The groundnut contains:

  1. Fats
  2. Water
  3. Salt
  4. Iron
Show answer and solution

Correct answer: A. Fats

1. An oily patch left on paper is the test for fat. 2. The patch stayed even after the paper dried. 3. So the groundnut contains fats. _Source: syllabus Science Class VI, Chapter 2, Components of Food._

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More Biology topics

BiologyCell Cycle and Cell DivisionComponents of FoodNutrition in PlantsOlympiad Biology