When an object moves through a fluid, which of the following will affect fluid friction? Select all that apply. (3.A.1)

• The fluid's color

• The fluid's viscosity

• The speed of the object

• The object's density

• The shape of the object

An airfoil’s movement through air is similar to ________. (3.A.1)

• a moving freight train

• a boat’s movement on water

• a beam of light

• electron flow through a wire

True or False. Water has greater viscosity than air. (3.A.1)

• True

• False

The Coanda Effect is the tendency of a stream of fluid to ________. (3.A.1)

• avoid a moving object

• move below an airplane's wing

• attach to a convex surface

• go around a wing or rotor

Which of the following are factors that affect air density? Select all that apply. (3.A.2)

• Humidity

• Pressure

• Viscosity

• Friction

• Temperature

Tags

NGSS.MS-PS1-4

Millibars (mb) is a unit of measurement for ________. (3.A.2)

• air temperature

• density

• atmospheric pressure

• fluid friction

True or False. Air density increases as altitude increases.

• True

• False

Which of the following statements about air density are true? Select all that apply.

• Air density and air pressure are inversely proportional.

• As temperature increases, so too does density.

• Temperature is inversely related to air density.

• Humid air is less dense than dry air.

True or False. The speed of sound is constant regardless of air temperature.

• True

• False

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Which layer of the atmosphere is closest to Earth?

• Stratosphere

• Troposphere

• Mesosphere

• Thermosphere