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Class-3-Science-Plants (ISO)

  1. What part of the plant absorbs water and nutrients from the soil?
    • A) Stem
    • B) Leaf
    • C) Root
    • D) Flower
  2. Which part of the plant helps it stand upright?
    • A) Root
    • B) Leaf
    • C) Flower
    • D) Stem
  3. What is the main purpose of a plant’s leaves?
    • A) To absorb sunlight
    • B) To store water
    • C) To produce flowers
    • D) To protect the plant from animals
  4. Where does photosynthesis mainly occur in a plant?
    • A) In the root
    • B) In the stem
    • C) In the leaf
    • D) In the flower
  5. Which part of the plant is responsible for making seeds?
    • A) Root
    • B) Leaf
    • C) Flower
    • D) Stem
  6. What do plants need to make their food?
    • A) Air and soil
    • B) Water, sunlight, and air
    • C) Soil and insects
    • D) Water and nutrients only
  7. Which of the following plants does not grow from seeds?
    • A) Fern
    • B) Rose
    • C) Pineapple
    • D) Potato
  8. What do you call the small openings on the underside of leaves?
    • A) Stems
    • B) Roots
    • C) Stomata
    • D) Flowers
  9. What part of the plant turns into fruit?
    • A) Stem
    • B) Leaf
    • C) Flower
    • D) Root
  10. Which of these is a type of root?
    • A) Taproot
    • B) Leaf
    • C) Flower
    • D) Stem
  11. What do you call a plant that has flowers and produces seeds?
    • A) Fern
    • B) Moss
    • C) Angiosperm
    • D) Algae
  12. How do plants get rid of excess water?
    • A) Through roots
    • B) Through leaves
    • C) Through flowers
    • D) Through stems
  13. What is the role of the plant’s stem?
    • A) To absorb nutrients
    • B) To produce seeds
    • C) To support leaves and flowers
    • D) To store food
  14. Which part of the plant helps in reproduction?
    • A) Leaf
    • B) Root
    • C) Flower
    • D) Stem
  15. What is the main function of plant roots?
    • A) To produce seeds
    • B) To absorb sunlight
    • C) To anchor the plant and absorb water
    • D) To make food
  16. How do most plants reproduce?
    • A) By making seeds
    • B) By making leaves
    • C) By making roots
    • D) By making flowers
  17. What type of plant grows without seeds?
    • A) Moss
    • B) Oak tree
    • C) Sunflower
    • D) Maple tree
  18. What is the function of plant flowers?
    • A) To help the plant stay upright
    • B) To produce seeds and attract pollinators
    • C) To absorb water
    • D) To store nutrients
  19. Which part of the plant stores food?
    • A) Root
    • B) Leaf
    • C) Flower
    • D) Stem
  20. What part of the plant helps in taking in sunlight?
    • A) Root
    • B) Flower
    • C) Leaf
    • D) Stem
  21. What do we call the process of a seed growing into a new plant?
    • A) Germination
    • B) Photosynthesis
    • C) Pollination
    • D) Respiration
  22. Which of these is not a part of a plant?
    • A) Leaf
    • B) Root
    • C) Branch
    • D) Seedling
  23. What helps a plant to grow tall?
    • A) Roots
    • B) Leaves
    • C) Stem
    • D) Flowers
  24. What is the green pigment in leaves that helps in photosynthesis?
    • A) Chlorophyll
    • B) Carotene
    • C) Xanthophyll
    • D) Anthocyanin
  25. What is a plant’s food-making process called?
    • A) Digestion
    • B) Respiration
    • C) Photosynthesis
    • D) Germination
  26. Which part of the plant often changes color in the fall?
    • A) Roots
    • B) Flowers
    • C) Leaves
    • D) Stem
  27. What is the main function of plant petals?
    • A) To absorb water
    • B) To produce seeds
    • C) To attract insects and animals for pollination
    • D) To support the stem
  28. Which part of the plant carries water and nutrients from the roots to other parts?
    • A) Leaves
    • B) Flowers
    • C) Stem
    • D) Roots
  29. What type of plant has no flowers but reproduces with spores?
    • A) Moss
    • B) Rose
    • C) Sunflower
    • D) Apple tree
  30. Where do plants usually get their food from?
    • A) Air
    • B) Soil
    • C) Water
    • D) Sunlight
  31. What do you call the process of transferring pollen from one flower to another?
    • A) Germination
    • B) Photosynthesis
    • C) Pollination
    • D) Respiration
  32. Which part of the plant is most likely to be colored brightly?
    • A) Root
    • B) Leaf
    • C) Flower
    • D) Stem
  33. What do you call a plant that lives for many years?
    • A) Annual
    • B) Perennial
    • C) Biennial
    • D) Seasonal
  34. What is the part of the plant that becomes a new plant after it falls to the ground?
    • A) Leaf
    • B) Seed
    • C) Flower
    • D) Stem
  35. Which plant part helps in the transport of food and water throughout the plant?
    • A) Stem
    • B) Root
    • C) Leaf
    • D) Flower
  36. What is the term for a plant that completes its life cycle in one growing season?
    • A) Perennial
    • B) Annual
    • C) Biennial
    • D) Evergreen
  37. What part of the plant protects the seeds while they develop?
    • A) Leaf
    • B) Root
    • C) Fruit
    • D) Stem
  38. How do plants get carbon dioxide for photosynthesis?
    • A) Through their roots
    • B) Through their leaves
    • C) Through their flowers
    • D) Through their stems
  39. What is the purpose of the plant’s root hairs?
    • A) To help the plant stand up
    • B) To absorb more water and nutrients
    • C) To produce flowers
    • D) To store food
  40. Which of the following is a part of a flower?
    • A) Petal
    • B) Bark
    • C) Root
    • D) Stem

Answer Key

  1. C) Root
  2. D) Stem
  3. A) To absorb sunlight
  4. C) In the leaf
  5. C) Flower
  6. B) Water, sunlight, and air
  7. D) Potato
  8. C) Stomata
  9. C) Flower
  10. A) Taproot
  11. C) Angiosperm
  12. B) Through leaves
  13. C) To support leaves and flowers
  14. C) Flower
  15. C) To anchor the plant and absorb water
  16. A) By making seeds
  17. A) Moss
  18. B) To produce seeds and attract pollinators
  19. A) Root
  20. C) Leaf
  21. A) Germination
  22. C) Branch
  23. C) Stem
  24. A) Chlorophyll
  25. C) Photosynthesis
  26. C) Leaves
  27. C) To attract insects and animals for pollination
  28. C) Stem
  29. A) Moss
  30. D) Sunlight
  31. C) Pollination
  32. C) Flower
  33. B) Perennial
  34. B) Seed
  35. A) Stem
  36. B) Annual
  37. C) Fruit
  38. B) Through their leaves
  39. B) To absorb more water and nutrients
  40. A) Petal