Boiling Point of Water at Altitude

The video explores how the boiling point of water changes with altitude. Starting in Kathmandu, the experiment shows water boiling at 97°C. As the team ascends to 3,500 meters, the boiling point drops to 91°C, and further decreases to 82°C at Everest Base Camp. The video explains that this occurs because atmospheric pressure decreases with altitude, requiring less energy for water to boil. The scientific principle is that water boils when vapor pressure equals atmospheric pressure, which is lower at higher altitudes.

What is the main objective of the experiment conducted by the team?

• To observe the behavior of water at sea level.

• To study the effects of temperature on water color.

• To compare the boiling point of water in different countries.

• To measure the temperature of water at different altitudes.

At what temperature does water boil in Kathmandu, which is 134 meters above sea level?

• 100°C

• 99°C

• 95°C

• 97°C

How does the boiling point of water at 3,500 meters compare to that in Kathmandu?

• It is higher by 9°C.

• It remains the same.

• It is lower by 6°C.

• It is higher by 6°C.

What is the boiling point of water at 3,500 meters?

• 82°C

• 97°C

• 100°C

• 91°C

What is the boiling point of water at Everest Base Camp, which is 5,364 meters above sea level?

• 97°C

• 100°C

• 91°C

• 82°C

Why does water boil at a lower temperature at higher altitudes?

• Because the atmospheric pressure is lower.

• Because the atmospheric pressure is higher.

• Because the temperature is higher.

• Because the water molecules are denser.

What happens to water molecules when they are heated?

• They change color.

• They become solid.

• They turn from a liquid to a gas.

• They turn from a gas to a liquid.

What is the relationship between water vapor pressure and atmospheric pressure for boiling to occur?

• Water vapor pressure must be lower than atmospheric pressure.

• Water vapor pressure must be higher than atmospheric pressure.

• Water vapor pressure must equal atmospheric pressure.

• Water vapor pressure is irrelevant to boiling.

What is the effect of less air and atmosphere at higher altitudes on boiling point?

• It increases the boiling point.

• It decreases the boiling point.

• It has no effect on the boiling point.

• It makes water boil faster.

What is the significance of the balance point in boiling water at high altitudes?

• It is when water becomes solid.

• It is when water vapor pressure matches atmospheric pressure.

• It is when water changes color.

• It is when water freezes.