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:
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:
- Your own body
Step by Step Procedure:
- Stand or sit in a comfortable position.
- Extend one arm in front of you, palm facing upward.
- Make a fist with your hand, ensuring that your fingers are curled tightly into your palm.
- Bend your arm at the elbow, bringing your fist closer to your shoulder.
- As you touch your shoulder with your fist, simultaneously use your other hand to touch the upper arm where the muscle bulges.
- 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:
- Be gentle while performing the experiment to avoid any discomfort or injury.
- 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.
