Atmospheric Pressure

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

  Nitrogen
• Why is oxygen important in the Earth's 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 the number of air particles as you go higher in the atmosphere?

  There are fewer air particles
• How does the number of collisions with an object relate to atmospheric pressure?

  More collisions mean higher pressure
• What is the relationship between force and pressure in the pressure equation?

  Higher force results in higher pressure
• What is the effect of altitude on the weight of gas particles above an object?

  Weight decreases with altitude
• Why do mountain climbers need to carry oxygen cylinders?

  Air is too thin to breathe
• What factors determine atmospheric pressure?

  • Density of gas particles
  • Weight of gas particles above the object
• How does atmospheric pressure change with elevation and why?

  • Pressure decreases with elevation
  • Due to fewer gas particles and collisions
• What happens to an object at sea level compared to one at 1,000 meters in terms of pressure?

  • Sea level object experiences higher pressure
  • More air particles and collisions at sea level