Atmospheric pressure

• What is the Earth's atmosphere primarily made of?

  Nitrogen
• Why is oxygen important in the atmosphere?

  It allows us to breathe
• What role do greenhouse gases play in the atmosphere?

  They keep the planet warm
• What does the ozone layer do?

  It keeps out harmful radiation
• Where is the density of gas particles highest in the atmosphere?

  Near the Earth's surface
• How does atmospheric pressure change with elevation?

  It decreases as elevation increases
• What happens to air particles as you go higher in the atmosphere?

  There are fewer air particles
• How does the number of air particles affect pressure at sea level compared to 1,000 meters up?

  More particles at sea level create higher pressure
• What is the relationship between collisions of air particles and pressure?

  More collisions result in higher pressure
• What is the pressure equation related to?

  Force and area
• Why does an object at sea level experience more pressure?

  It has more particles colliding with it
• What contributes to the pressure experienced by an object at sea level?

  The weight of gas particles above it
• How does the weight of gas particles change with elevation?

  It decreases as elevation increases
• Why do mountain climbers carry oxygen cylinders?

  The air is too thin to breathe
• What are the main factors affecting atmospheric pressure?

  • Density of gas particles
  • Weight of gas particles above
• What happens to atmospheric pressure as you ascend in altitude?

  • Pressure decreases
  • Fewer air particles are present
  • Less weight from gas above
• How does the concept of pressure relate to air particles and elevation?

  • More air particles = higher pressure
  • Fewer air particles = lower pressure
  • Pressure is influenced by collisions and weight