Understanding Boiling in Different Conditions

What unusual phenomenon do astronauts observe with liquids in space?

• Liquids remain completely still.

• Liquids turn into gas without boiling.

• Liquids boil vigorously before freezing.

• Liquids evaporate instantly.

Why is heat necessary for boiling water under normal conditions?

• To increase vapor pressure inside bubbles.

• To decrease the water's volume.

• To increase the water's density.

• To decrease atmospheric pressure.

What is the boiling point of water at sea level under normal conditions?

• 110 degrees Celsius

• 90 degrees Celsius

• 100 degrees Celsius

• 120 degrees Celsius

Why does water boil at a lower temperature on Mount Everest?

• Higher atmospheric pressure at high altitudes.

• Increased vapor pressure at high altitudes.

• Lower atmospheric pressure at high altitudes.

• Decreased vapor pressure at high altitudes.

What happens to the boiling point of water as atmospheric pressure decreases?

• It fluctuates randomly.

• It remains the same.

• It decreases.

• It increases.

How can you demonstrate boiling without heat using a syringe?

• By pulling the plunger quickly.

• By shaking the syringe.

• By compressing the syringe.

• By heating the syringe.

What happens to water in a vacuum chamber as air pressure approaches zero?

• It evaporates instantly.

• It turns into ice.

• It starts boiling.

• It remains liquid.

What is the main reason water can boil without heating in a vacuum?

• Decreased vapor pressure.

• Increased water density.

• Sufficient vapor pressure to counter reduced air pressure.

• Increased atmospheric pressure.

What is the state of water in a vacuum chamber after it has boiled?

• It becomes a gas.

• It evaporates completely.

• It turns into ice.

• It remains boiling.

What unexpected result occurs with water in a vacuum after boiling?

• It turns into a gas.

• It evaporates completely.

• It freezes over.

• It remains boiling indefinitely.