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Objective Questions

Latest Science Olympiad Class 4 Exam Question (Objective Questions), MCQ in English

Subjects : Science, Achievers Section

Question Bank Science Olympiad Class 4 Exam Level 2 - English
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Science

Question 1Single Answer
Which part of a plant absorbs most water from the soil?
  1. A
    Roots
  2. B
    Fruits
  3. C
    Leaves
  4. D
    Flowers
Question 2Single Answer
Which gas do green plants take in during photosynthesis?
  1. A
    Nitrogen
  2. B
    Oxygen
  3. C
    Hydrogen
  4. D
    Carbon dioxide
Question 3Single Answer
Which part of a flower usually develops into a fruit after fertilisation?
  1. A
    Petal
  2. B
    Ovary
  3. C
    Sepal
  4. D
    Stamen
Question 4Single Answer
Which animal is a herbivore?
  1. A
    Eagle
  2. B
    Wolf
  3. C
    Deer
  4. D
    Tiger
Question 5Single Answer
Which plant is commonly grown from a stem cutting?
  1. A
    Pea
  2. B
    Rose
  3. C
    Wheat
  4. D
    Maize
Question 6Single Answer
Which of these animals undergoes metamorphosis from tadpole to adult?
  1. A
    Lizard
  2. B
    Cat
  3. C
    Frog
  4. D
    Sparrow
Question 7Single Answer
What is the main role of chlorophyll in leaves?
  1. A
    Absorbing minerals from soil
  2. B
    Producing seeds
  3. C
    Trapping sunlight
  4. D
    Carrying water to roots
Question 8Single Answer
Which seed is most likely to be dispersed by wind?
  1. A
    Dandelion
  2. B
    Mango
  3. C
    Pea
  4. D
    Coconut
Question 9Single Answer
Which adaptation helps a cactus survive in a desert?
  1. A
    Soft waterlogged stem
  2. B
    Large thin leaves
  3. C
    Spines instead of broad leaves
  4. D
    Roots growing only above soil
Question 10Single Answer
Which animal is classified as an invertebrate?
  1. A
    Frog
  2. B
    Earthworm
  3. C
    Fish
  4. D
    Rabbit
Question 11Single Answer
Which bird has webbed feet that help it swim?
  1. A
    Sparrow
  2. B
    Duck
  3. C
    Woodpecker
  4. D
    Eagle
Question 12Single Answer
What is the main function of feathers on a bird’s wings?
  1. A
    Chewing food
  2. B
    Digging soil
  3. C
    Smelling flowers
  4. D
    Helping in flight
Question 13Single Answer
Which bird has a hooked beak suited to tearing flesh?
  1. A
    Hummingbird
  2. B
    Duck
  3. C
    Pigeon
  4. D
    Eagle
Question 14Single Answer
Which bird uses a long, pointed beak to catch fish?
  1. A
    Parrot
  2. B
    Hen
  3. C
    Sparrow
  4. D
    Kingfisher
Question 15Single Answer
Why do many birds sit on their eggs?
  1. A
    To make eggs lighter
  2. B
    To keep the eggs warm
  3. C
    To turn eggs into seeds
  4. D
    To make the shells thicker
Question 16Single Answer
Which bird cannot fly but is an excellent swimmer?
  1. A
    Crow
  2. B
    Swallow
  3. C
    Pigeon
  4. D
    Penguin
Question 17Single Answer
What helps a woodpecker grip tree trunks?
  1. A
    Strong claws
  2. B
    Flat swimming feet
  3. C
    Hooves
  4. D
    Webbed toes
Question 18Single Answer
Which bird has a broad, flat beak for straining food from water?
  1. A
    Duck
  2. B
    Woodpecker
  3. C
    Hawk
  4. D
    Sunbird
Question 19Single Answer
What do air-filled spaces in many bird bones help with?
  1. A
    Making the beak stronger
  2. B
    Producing feathers
  3. C
    Storing seeds
  4. D
    Making the body lighter
Question 20Single Answer
Which nutrient is mainly needed for growth and repair of body tissues?
  1. A
    Water
  2. B
    Protein
  3. C
    Fibre
  4. D
    Carbohydrate
Question 21Single Answer
Which food is rich in vitamin C?
  1. A
    Butter
  2. B
    Guava
  3. C
    Rice
  4. D
    Salt
Question 22Single Answer
Which nutrient provides the body with a major source of energy?
  1. A
    Carbohydrates
  2. B
    Water
  3. C
    Minerals
  4. D
    Vitamins
Question 23Single Answer
Why should we wash fruits before eating them?
  1. A
    To change their seeds
  2. B
    To make them grow
  3. C
    To add protein
  4. D
    To remove dirt and some germs
Question 24Single Answer
Which food contains substantial calcium for healthy bones and teeth?
  1. A
    Cooking oil
  2. B
    Milk
  3. C
    Sugar
  4. D
    White rice
Question 25Single Answer
Which method preserves food by removing much of its moisture?
  1. A
    Drying
  2. B
    Serving warm
  3. C
    Boiling briefly
  4. D
    Mixing with fresh water
Question 26Single Answer
Which food group mainly helps prevent constipation by adding roughage?
  1. A
    Candies and sweets
  2. B
    Vegetables and fruits
  3. C
    Soft drinks
  4. D
    Butter and ghee
Question 27Single Answer
What may happen when a person lacks enough iron in the diet?
  1. A
    Rickets
  2. B
    Anaemia
  3. C
    Night blindness
  4. D
    Scurvy
Question 28Single Answer
Which is the safest habit before preparing a meal?
  1. A
    Taste every ingredient with fingers
  2. B
    Keep raw meat beside cooked food
  3. C
    Wash hands with soap
  4. D
    Use an unwashed cutting board
Question 29Single Answer
Which roof shape is useful in areas with heavy snowfall?
  1. A
    Roof made only of glass
  2. B
    Open roof
  3. C
    Sloping roof
  4. D
    Completely flat roof
Question 30Single Answer
Why are houses in earthquake-prone areas designed with flexible structural features?
  1. A
    To better resist shaking
  2. B
    To increase indoor darkness
  3. C
    To store more rainwater
  4. D
    To prevent all wind

Achievers Section

Question 31Single Answer
A potted plant kept in darkness for a week becomes pale. What is the most likely reason?
  1. A
    Its roots have turned into flowers
  2. B
    It cannot make enough food by photosynthesis
  3. C
    Its leaves are absorbing extra sunlight
  4. D
    It receives too much oxygen
Question 32Single Answer
Two identical seedlings get equal water; one receives sunlight and the other is kept in a cupboard. Which will probably grow healthier?
  1. A
    The seedling kept in the cupboard
  2. B
    The seedling receiving sunlight
  3. C
    Neither needs light to grow
  4. D
    Both will photosynthesise equally
Question 33Single Answer
A cactus survives where rainfall is scarce. Which feature helps it conserve water?
  1. A
    Leaves modified into spines
  2. B
    A soft water-leaking stem
  3. C
    Roots that absorb sunlight
  4. D
    Broad thin leaves
Question 34Single Answer
A water lily floats on a pond. What helps its leaves receive sunlight?
  1. A
    Roots above all the flowers
  2. B
    No air spaces inside the plant
  3. C
    Leaves that remain buried in mud
  4. D
    Broad floating leaves
Question 35Single Answer
A plant's roots are damaged during transplantation. Which problem will appear first?
  1. A
    An immediate increase in fruit size
  2. B
    Faster photosynthesis
  3. C
    Reduced absorption of water and minerals
  4. D
    More oxygen absorbed by flowers
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