Gravitational+Force

BIG QUESTIONS for you to think about: What is gravitational force? What effects does it have on us and the things around us? In what way is it important to us? ANS CONTRIBUTED BY JEREMIAH: Gravitational force is a force that the earth exerts on all objects all the time. Ans By Celestine: Gravity is the pull on all objects exerted by the Earth.It is a force that pulls them towards the center of the Earth.ANS By Wei Bin: Gravitational force can also prevent all things on Earth to float. So as when we are in space, there is less gravitational force and therefore we would float around and have little control on where we are moving.

The two video clip tell you what gravity is and the factors affecting it. media type="youtube" key="V_Ul1-Su2rg" height="344" width="425"

media type="youtube" key="6O5ArcZaxzs" height="344" width="425"

 Activity Look at the pictures of the merry-go-round. Can you explain how the merry-go-round can be used as a model to show how the planets in the solar system orbit? Write your explanation in the table below.


 * Your explanation on how the Merry-go-round is like the planets orbiting in the Solar System... ||
 *  ||

This video clips compares the differences between mass and weight. media type="youtube" key="6ccIjRwYO9U" height="344" width="425"  Activity Make some notes in you Science notebook as you watch it.

Extension activity Please go to the discussion page to post any message pertaining to your observations/ explanations on what you have learnt or want to share with the class. //**(Please do not search or post any video clips until further instructions.)**//