Introduction to Gases

In which state of matter do particles move quickly and in all directions?

• solids

• liquids

• gases

• all of these

Why do gases have low density?

• because the particles are packed closely together

• because the particles move quickly and in all directions

• because most of the volume occupied by a gas is empty space

• because the volume of the gas is always the volume of the container

What is true of molecules of gas that are exposed to heat in a fixed volume container?

• They move faster and they cause the pressure to increase

• They move slower and pressure will decrease

• The volume increases and pressure increases

• The volume decreases and the pressure decreases.

Tags

NGSS.HS-PS3-4

Two basic properties of the gas phase are

• a definite shape and a definite volume

• a definite shape but no definite volume

• no definite shape but a definite volume

• no definite shape and no definite volume

The particles are mostly free of each other's influence in a _________.

• Gas

• Liquid

• Solid

Tags

NGSS.MS-PS1-4

Which 2 are variables of a gas?

• solid and liquid

• size and shape

• pressure and volume

Which is NOT an assumption made by the kinetic molecular theory of gases?

• Gas particles are small and take up little volume
• Particles travel in constant, random, straight-line motion until colliding
• When particles collide, their total kinetic energy is decreased
• Particles do not attract or repel each other

Which is NOT an assumption made by the kinetic molecular theory of gases?

• Gas particles are small and take up little volume
• Particles travel in constant, random, straight-line motion until colliding
• When particles collide, their total kinetic energy is decreased
• Particles do not attract or repel each other

Tags

NGSS.HS-PS3-2

The kinetic molecular theory describes particles in a __________.

• real gas
• ideal gas
• room temperature
• at normal pressure

Which shoe would create the most force:
tennis shoe or high heel?

• tennis shoe
• high heel

Tags

NGSS.HS-PS2-1