Air Parcels & Energy
Same starting water vapor, but only Day 2 produced rain.
1. Was the air parcel warmer, cooler, or the same as Day 1?
2. Did the air parcel gain or lose energy?
The air parcel was:
1. warmer than the surrounding air and
2. lost energy.
One storm starts at 31°C and another at 15°C, with everything else the same. Which one produces more rain?
The storm that starts at 31°C.
What does wind do to an air parcel that helps increase rainfall?
Wind pushes air parcels higher into the troposphere, increasing rainfall.
What process creates water droplets on the outside of a cold glass?
Condensation
Why is one place warmer than another in terms of energy transfer?
More energy is absorbed by the surface and transferred to the air.
A warm air parcel rises into cooler air and changes energy, leading to precipitation. Does it gain or lose energy?
It loses energy.
A storm produces more rainfall when warm air is combined with ________________ that helps push it upward.
A. Sunlight
B. Gravity
C. Wind
C. Wind
What role does wind play in the formation of rain clouds?
It lifts air so it can cool and form clouds.
Where does the water on the outside of a cold bottle originally come from?
The air
What temperature will a hot drink eventually reach in a cool room?
The temperature of the room.
Rain happens on a day when an air parcel starts out warmer than the air around it and changes energy as it rises. Is it gaining or losing energy?
It loses energy.
Warmer surface temperatures lead to more rainfall because...
A. It gains more energy as it rises higher in the troposphere.
B. It loses more energy as it rises higher in the troposphere.
B. It loses more energy as it rises higher in the troposphere.
What two conditions together create the most rainfall in a storm?
Warm air and strong wind.
What process changes liquid water into water vapor using energy from the sun?
Evaporation
What is the correct order of energy transfer from the sun to the air?
Sun → Earth’s surface → air.
Two air parcels start the same, but only one is warmer than the surrounding air.
1. Which will produce rainfall-the warmer or the colder air parcel?
2. Is it gaining or losing energy?
The (1) warmer air parcel produces more rainfall because it (2) loses energy.
Between two storms at 21°C and 29°C, which one will produce more rainfall?
The storm at 29°C will produce more rainfall.
Why do storms often get stronger when wind speeds increase?
Stronger winds push the air parcel higher, increasing cooling and cloud formation.
What type of weather is most likely when warm and cold air masses meet?
Cloudy, rainy weather
What temperature will an air parcel reach once it has reached equilibrium?
Surrounding air temperature.
What is the key factor that decides which air parcel produces more rain, even if both start with the same water vapor?
How much energy the air parcel loses.
The process that directly causes water vapor in a cloud to turn into liquid droplets, leading to rainfall.
Condensation
What is the key energy change that happens to rising air parcels that leads to cloud formation and rain?
The air parcel loses energy as it rises and cools.
What part of Earth receives energy from the sun first in the water cycle?
Earth's surface
The higher the temperature of the air parcel, the __________________ the air parcel will rise into the troposphere.
Higher