Floating and sinking

Today we have conducted an experiment into floating and sinking. We were given the following key vocabulary: up thrust, float, push, balanced, weight, force and sink.
We then had to explain what happened to a ping pong ball and a rubber when they were dropped and then pushed into the water.
Our findings showed that the ping pong ball floated and the rubber sank. But then we had to consider why.

Marshall said “the ping pong ball will float on the water because it is light and the up thrust from the water is a stronger force.”

Grace said “the rubber sank because it was heavy and the force of the weight of it was stronger than the up thrust force from the water”.

Here are some pictures…





Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s

%d bloggers like this: