Floating

and

Sinking

 

 

Predicting

2.1 Floating and Sinking (observation and opinion)

 

 

Write as many short sentences as you can about the picture above.

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2.1 Floatability: Surprising Sinkers and Floaters

Exploration 2 Part 1 Class Demonstration Eggs And Icecubes p84

For each liquid predict (float/sink) then try it

Prediction Chart: Fill in the table below.

Now record the floating level of all the substances by matching the floating location of each substance on the right with a location on the left.

2.2 Floatability: Surprising sinkers and floaters

Predict the Floating Level.

Either Match or if possible move the items at the right to the correct floating level at the left.

Next we will check our predictions by floating the liquids in a clear straw. The three liquids are colour coded as follows:

Use the following table to record your floating data:

Place the symbol

on the combinations which do not work.

Data Table:

 

 

 

Floating Level

Match the liquid at the right with the correct floating level at the left

 

 

 

 

 

 

 

 

 

 

The _________________ has the strongest buoyant force.

The __________________ has the weakest buoyant force.

 

2.3 Predicting-Using Natural Sinkers and Floaters (Medium Level)

Predict wether the objects sink or float.

Try each to correct them.

Complete the table:

Object

Sink

Float

Not sure?

Charcoal Briquettes

     

small cork

     

large cork

     

cotton wool

     

pen top

     

small plasticine (clay)

     

large plasticine (clay)

     

small candle wax

     

large candle wax

     

small Marshmallows

     

large Marshmallows

     

small pumice stone

     

large pumice stone

     

comb

     

straw

     

glue stick

     

aluminium foil

     

aluminium wire

     

ball of aluminium foil

     

Wood

     

polystyrene

     

Lego

     

 

2.3 Predicting- Using Natural Sinkers and Floaters (Modified Level)

 

Floater

Sinker

Object

Floater

Sinker

 

 

 

 

 

   

   

   

   

   

 

Object

Floater

Sinker