Course Content
Lesson 1 – Human Body : The Food We Eat
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Lesson 3 – Human body : The Digestive and Excretory systems
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Lesson 4 : Plants in the Surroundings and Environment
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Lesson 6 : Adaptation in Animals
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Lesson 8 : Materials and Solutions
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Lesson 10 : Measurement
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Lesson 11 : Push and Pull
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Lesson 12 : Friction as a Force
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Class 4 – EVS
    About Lesson

    1/10/20

    9. Give reasons:

    i) Leaves of some fixed aquatic plants have a waxy coating on them.

    A. The fixed aquatic plants have waxy coated leaves so that water does not stay on them.

    ii)Underwater plants have narrow leaves.

    A. They have narrow leaves which allow the free flow of water.

    10. Name the three types of aquatic plants. Give one adaptation of each of them with an example.

    A. The three types of aquatic plants are:

    1. Floating plants

    2. Fixed plants

    3. Underwater plants

    Adaptations:

    Floating plants: Their stems are light and filled with air. eg: Duckweed

    Fixed plants: Their stem is long, thin, flexible and hollow. eg: Lotus

    Underwater plant: They have flexible stem. eg: Hydrilla