Pressure Buoyancy

Average sea level air pressure is about _________.

• 1. 101 kPa

• 1. 151 kPa

• 1. 201 kPa

• none of these

1. When you inhale

• the rib cage contracts

• the diaphragm contracts

• the lungs contract

• 1. two of these

Air pressure changes with altitude because of changes in

• temperature of the atmosphere

• density of the atmosphere

• depth of the atmosphere.

• 1. two of these

Atmospheric pressure at the top of Mount Everest is about 2/3 the pressure at sea level

• TRUE

• FALSE

Particles of air are constantly moving

• 1. TRUE

• 1. FALSE

Tags

NGSS.MS-ESS2-5

Archimedes’ law explains why some very heavy objects can float on water.

• TRUE

• FALSE

A bigger object displaces less water than a smaller object

• TRUE

• 1. FALSE

1. According to Archimedes’ law, the buoyant force acting on an object equals the

• volume of the object

• weight of the displaced fluid

• weight of the object

• volume of the displaced fluid

1. The shape of an airplane wing causes

• air to flow more slowly below the wing than above it

• air pressure to be less in front of the wing than behind it

• air to flow only under the wing and not above it

• air pressure to be greater above the wing than below it

1. As air moves faster the pressure will

• 1. be the same

• 1. be greater

• 1. be less

Tags

NGSS.MS-ESS2-5