Buoyancy

True or false. If something has buoyancy it is able to float.

• True

• False

Some things that will float in water are:

• a solid clay ball and a lacrosse ball

• rocks and ceramic weights

• a textbook and a pebble

• a cork and a medicine cup

Which liquid is the least dense?

• oil

• water

• syrup

• plastic bottle

Tags

NGSS.MS-PS1-2

What is the formula for density?

• density = mass x volume

• density = mass / volume

• density = mass + volume

• density = mass - volume

What happens when you heat a gas?

• It gains mass.

• It loses mass.

• It increases in volume.

• It decreases in volume.

Tags

NGSS.MS-PS1-4

 Whose principle says buoyant force = the weight of the fluid an object displaces 

• Archimedes

• Pascal

• Bernoulli

• Einstein 

Why does a steel ship float, while a block of the same steel sinks?

• shape of object

• air is lighter than water

• the block's buoyancy is less than its weight

• all of the above

Why do boats float?

• The material they are made up of.

• Their volume gives them a large density.

• Their hollow shape leads to a low density.

• The number of passengers is not too high.

A helium balloon floats in air because

• there is more air than helium.

• helium is equally dense as air.

• helium is less dense than the air.

• helium is as dense as the air.

 Why do you not notice atmospheric pressure on your body?

• There is none.

• It is very low.

• The fluids of your body exert equal and opposite pressure.

• Gravity.

Tags

NGSS.MS-ESS2-5