1. Thermal Energy Transfer by Conduction, Convection, and Radiation
UNIT 1
Chapter 1: Inquiring about Weather
Section 1.1
Thermal Energy Transfer by Conduction, Convection, and Radiation
Thermal energy is transferred from a warmer object to a cooler object, and it is transferred in three ways.
Radiation is the transfer of thermal energy by electromagnetic waves.
Conduction is the transfer of thermal energy between two objects or substances that are in direct contact.
Convection is the transfer of thermal energy by the movement of heated material (liquids or gases) from one place to another.
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2. Thermal Energy Transfer by Conduction, Convection, and Radiation
UNIT 1
Chapter 1: Inquiring about Weather
Section 1.1
Thermal Energy Transfer by Conduction, Convection, and Radiation
Explain in your own words how thermal energy is transferred in the atmosphere by conduction, convection, and radiation.
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3. Thermal Energy Transfer by Conduction, Convection, and Radiation
UNIT 1
Chapter 1: Inquiring about Weather
Section 1.1
Thermal Energy Transfer by Conduction, Convection, and Radiation
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4. Atmospheric Pressure UNIT 1
Chapter 1: Inquiring about Weather
Section 1.1
Atmospheric Pressure
At sea level, the atmospheric pressure is about kPa.
As altitude increases, atmospheric pressure decreases.
As altitude increases, temperature decreases.
As altitude increases, the density of the atmosphere also decreases.
How would the changes in
altitude, temperature, density,
and atmospheric pressure affect a mountain climber on the peak
of Mount Everest?
Atmospheric pressure is the pressure exerted by air particles above any point on Earth’s surface.
A climber will have difficulty breathing because atmospheric pressure and air density are lower at higher altitudes. The climber will also be cold because the temperature is lower.
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5. UNIT 1
Chapter 1: Inquiring about Weather
Section 1.1
Atmospheric Pressure
Meteorologists—scientists who study weather– use atmospheric pressure readings to predict changes in the weather.
A decrease in atmospheric pressure suggests that warm, humid air is approaching and that the temperature will increase.
An increase in atmospheric pressure suggests that cool, dry weather is approaching.
Humidity is a measurement that describes the amount of water vapour in air.
The air becomes saturated when the specific humidity equals the capacity of air to hold water at a specific temperature, known as the dew point.
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