Atmospheric pressure

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

  Nitrogen
• What role does oxygen play in the atmosphere?

  It allows us to breathe
• What do greenhouse gases do?

  They keep the planet warm
• What is the function of the ozone layer?

  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
• Why does an object at sea level experience more pressure than at 1,000 meters?

  There are more air particles at sea level
• What is the relationship between collisions and pressure?

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

  Force and area
• How does the weight of gas particles affect pressure?

  More weight increases pressure
• Why do mountain climbers carry oxygen cylinders?

  Air is too thin at high altitudes
• 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 elevation?

  • Pressure decreases
  • Fewer air particles
  • Less weight above
• What is the significance of atmospheric pressure in relation to breathing?

  • Higher pressure aids breathing
  • Lower pressure at altitude makes breathing difficult