Touch your shoulder in Movements in Animals – Class 6 Science Experiment

Chapter Name: Movements in Animals

Activity Name: Touch your shoulder in Movements in Animals

Activity Description:

Touch your shoulder in Movements in Animals - Class 6 Science Experiment

The experiment involves demonstrating the concept of muscle contraction and observing the effects on the upper arm.

By making a fist with one hand, bending the arm at the elbow, and touching the shoulder with the fist, we can feel a swollen region inside the upper arm. This swollen region is caused by the contraction of the muscle.

Required Items:

  1. Your own body

Step by Step Procedure:

  1. Stand or sit in a comfortable position.
  2. Extend one arm in front of you, palm facing upward.
  3. Make a fist with your hand, ensuring that your fingers are curled tightly into your palm.
  4. Bend your arm at the elbow, bringing your fist closer to your shoulder.
  5. As you touch your shoulder with your fist, simultaneously use your other hand to touch the upper arm where the muscle bulges.
  6. Pay attention to the sensations in your upper arm.

Experiment Observations:

During the experiment, you may observe the following:

  • As you touch your shoulder with your fist, you may feel a swollen region inside your upper arm.
  • The swollen region is caused by the contraction of the muscle.
  • The muscle becomes shorter, stiffer, and thicker when it contracts.

Precautions:

  1. Be gentle while performing the experiment to avoid any discomfort or injury.
  2. Do not forcefully exert pressure on the upper arm or overexert the muscle.

Lesson Learnt from Experiment:

The experiment demonstrates the concept of muscle contraction. When muscles contract, they become shorter, stiffer, and thicker. The swollen region felt inside the upper arm is a result of this contraction.

Understanding how muscles work and the effects of their contractions is essential for comprehending movements in animals.

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