Gravitation Activity 4 An example of force at a distance

Activity No #4 Why do objects feel heavy

 * Estimated Time - 30 minutes
 * Materials/ Resources needed
 * 1) A piece of iron
 * 2) A piece of wood
 * 3) A ball of yarn or cotton
 * Prerequisites/Instructions, if any
 * Multimedia resources
 * Website interactives/ links/ simulations
 * Process (How to do the activity)
 * 1) Hold each object in your palm
 * 2) What do you feel when you hold each one of them (ask them to answer as light--->heavy)
 * Developmental Questions (What discussion questions)
 * 1) Is there a difference when you hold each of them?
 * 2) Is this due to inertia? Am I changing anything when I am holding?
 * 3) What might this difference be due to?
 * 4) This is due to a property called weight which is because the mass of this object interacts with another mass - that of the earth. We call this weight
 * 5) We will study more about this - but mass also interacts with other masses; this is called gravitational property. We already saw that is has an inertial property
 * 6) The Earth is not touching the object, but still its mass has an effect on the mass on my hand
 * 7) Gravity can act at a distance between two masses
 * Evaluation (Questions for assessment of the child)
 * 1) Does mass have both inertial and gravitational property?
 * 2) Does gravitational property depend on size? Or mass?
 * Question Corner
 * 1) If an object has inertia, when I drop the object why does it fall?
 * 2) Do you feel the gravitational effect of the Earth?