Heat Transfer and the Movement of Air

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Heat Transfer and the Movement of Air

• LESSON 4
• STORMS

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OBJECTIVES

• Investigate the effect of surface temperature on
  the temperature of the air above the surface.
• Hypothesize how heat is transferred between the
  earths surface and the air above it.
• Observe describe the effect of surface
  temperature on the movement of air above the
  surface

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OBJECTIVES

• Determine the basic conditions under which water
  moves through the air.
• Develop working definitions for the terms stable
  air mass and unstable air mass

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Inquiry 4.1 Investigating the Temperature of Air

• Demo of Experimental Setup
• See Figure 4.1 pg. 44
• See Figure 4.2 pg. 45

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Fair Test

• HOW WOULD YOU MAKE THIS EXPERIMENT A FAIR TEST?
• VARIABLES THAT WILL REMAIN THE SAME
• AMT. OF WATER
• ATM OF TIME EA. CONTAINER OF WATER IS UNDER THE
  CONVECTION TUBE
• AMT OF TIME BET. TEMP READINGS

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PREDICTION

• THE SURFACE TEMPERATURE IN THE CONVECTION TUBES
  WILL CAUSE THE AIR ABOVE IT TO.

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HYPOTHESIS

• I THINK THAT WILL OCCUR BECAUSE..

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Student Sheet 4.2 Investigating How Warm and
Cold Air Move Question I will try to
answer Directions Answer the questions. Then
complete the diagram after you conduct your
investigation. 1. How will you set up your
equipment in order to make this a fair test?
What will you keep the same?
What one variable will you test? 2.
Now make a prediction. What do you think will
happen when the two air masses meet?
3. Draw a diagram in the space below showing
what happened when you introduced smoke into
the tube.      
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VARIABLE THAT WILL CHANGE

• TEMPERATURE OF WATER IN EACH CONTAINER

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REFLECTION 4.1

• A. How did the temperature of each
• container of water affect the
• temperature of the air above it?
• Hot water heated air directly above it
• Cold water cooled air directly above it

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Reflection Question B

• The movement of heat is called heat transfer.
  Describe the heat transfer between the container
  of hot water air.
• Heat moved from warm water to the cooler air ,
  which heated the air
• Describe the heat transfer between the container
  of cold water the air.
• Heat moved from the warm air to the cooler
  water, which heated the water cooled the air

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Reflection Question C

• Under what conditions was it difficult to see
  through a cylinder? Why do you think this
  happened?
• The tube with hot water fogged up because
  moisture formed on the inside of the convection
  tube.
• More condensation took place with hot water
  because of greater evaporation

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Reflection Question D

• Why do you think covering the container would
  help keep the cylinder clear?
• The plastic would reduce evaporation by blocking
  the escape of water vapor

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REFLECTIONS 4.2

• A. ON THE BASIS OF YOUR TEMPERATURE READINGS IN
  INQUIRY 4.1, HOW DOES THE TEMPERATURE OF A
  SURFACE AFFECT THE TEMPERATURE OF THE AIR ABOVE
  IT?
• Air takes on the temperature of the SURFACE below
  it.

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• B. HOW DID THE AIR, WHICH WAS VISIBLE BECAUSE OF
  THE SMOKE, MOVE IN THE CONVECTION TUBE WHEN THE
  WATER UNDER IT WAS COLD? EXPLAIN WHY YOU THINK
  THIS HAPPENED.
• 1. The cold air moved down.
• 2. The air looked thick and heavy.
• 3. Heavy, dense air sinks.

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• C. WHAT HAPPENED TO THE AIR INSIDE THE
  CONVECTION TUBE WHEN THE WATER WAS HOT? EXPLAIN
  WHY YOU THINK THIS HAPPENED.
• The hot air rose quickly
• The air looked wispy and light
• Light, less dense air rises

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• D. WHY DO YOU THINK MOISTURE FORMED ON THE
  INSIDE OF THE CONVECTION TUBE WITH HOT WATER?
  HOW DO YOU THINK THIS RELATES TO CLOUD FORMATION
  ON EARTH?
• The energy needed to evaporate water came from
  the hot water. When water vapor rises to high
  altitudes where the air is cold, it changes into
  liquid or ice (Condensation) The process of
  liquid changing to water is called evaporation.

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• E. APPLY WHAT YOU OBSERVED IN LESSON 4 TO THE
  EARTH. IF THE EARTHS SURFACE IS COLD, WHAT WILL
  HAPPEN TO THE AIR ABOVE IT? IF THE SURFACE IS
  HOT WHAT WILL HAPPEN TO THE AIR ABOVE IT?
• The air above an area of the earth where it is
  cold will be colder. The air above a warm area
  will be warmer.

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Read pg. 49 Air Masses