Which is true about the density of warm and cold air?
Cold air is denser than warm air
warm air is denser than cold air
Warm and cold air have the same density
When Robert Boyle left the barrel of water out in the cold overnight, what did he discover?
Water froze at 0 degrees celcius
The structure of the barrel was optimal for freezing water
The barell weighed the same when the water was solid or liquid
Other than temperature, what other factor was vitally important in calculating and attempting to reach absolute zero?
Pressure
Humidity
Atomic mass
Altitude
Lavoiser (The French scientist) theorized that a substance called "Caloric" was responsible for matter getting colder. We know today that it is not caloric, but rather...
Pressure
Altitude
Slower movement of particles
Atomic mass
When Faraday did his experiment with chlorine in a glass tube, he found that the tube absorbed heat. When this heat was absorbed it ___________ the surroundings.
Cooled
Heated
had no effect on
Carnot discovered that heat ALWAYS flowed ____________
From cold to hot
From Higher to lower
From hot to cold
From lower to higher
What is critical about freezing food to keep it tasting good?
Freezing the food slowly
Freezing the food fast
Keeping the pressure low
Keeping the pressure high
What did air conditioning make possible in large cities?
Buildings taller than 20 stories
Trains that could run for longer than 4 hours a day