7Kc That Floating Feeling

What two forces affect you when you float?

• weight and upthrust.

• weight and friction.

• mass and push.

• mass and pull.

When an object floats, the force of gravity and the force of upthrust are:

• the same.

• different.

The density of water is ....

• 0.01g/cm³

• 8g/cm³

• 0.7g/cm³

• 1g/cm³

Wood has a density of 0.7 g/cm³. It will ...........

• float.

• sink.

Iron has a density of 8g/cm³. It will ............

• float.

• sink.

Polystyrene has a density of 0.01 g/cm³. It will ............

• float.

• sink.

Lead has a density of 11.33 g/cm³. It will ............

• float.

• sink.

Density is:

• the weight of a fixed mass of something.

• the volume of a fixed weight of something.

• the weight of a fixed volume of something.

• the mass of a fixed volume of something.

You can find the volume of the object in the can by:

• measuring the object and multiplying the numbers.

• measuring the volume of the water it displaces.

• weighing the object.

• using a thermometer.

Calculate the density of an object who's mass is 80g and volume is 20cm³.

• 40g/cm³.

• 4g/cm³.

• 100g/cm³.

• 60g/cm³.