Transcript Weather and Water Investigations 3-5

Welcome and Introductions
Introduction activity: Goals/ Outcomes
Agenda:
-Welcome-Reflection on Variables
-Assessment prototype
-Investigation 3: 3 parts
-Investigation 4: 2 parts
-Investigation 5: 3 parts
Weather and Water
Investigation #3
Seasons and Sun
PART 1: HOW MUCH SUNSHINE?
• Quick Write
– What causes seasons?
• Focus on Sunshine
– I’ve heard it said that Dec 21st is the shortest day of the year. Why
would someone say that? Is there a longest day of the year?
• Calculating Hours of Sunlight for Your Location
– Using the information we just discussed, as a team predict how
many hours of sunlight we will have today? Explain your estimate.
– Given the sunrise and sunset times, develop a strategy to calculate
daylight hours
– Discuss an example
• Graph and Analyze Daylight Hours for Berkeley
– Bar vs. Line
• Reading
– Wendy and Her Worldwide Weather Watchers, pre/post questions
Weather and Water
Investigation #3
Seasons and Sun
PART 2: SUN-EARTH SYSTEM
• Discussion Questions
– Transparency 3
• Sun-Earth Model
– Revolve, Rotation, North Star, Hours of Daylight,
Equinox, Solstices, Seasons, ellipse, tilt, perihelion,
aphelion
• Reading
– Seasons (diagram)
• Multimedia
– Seasonal Changes (lab notebook pg 9)
• Assessment
– Response Sheet-Seasons and Sun
Weather and Water
Investigation #3
Seasons and Sun
PART 3: SUN ANGLE AND SOLAR
HEATING
• Ask
– What kind of weather do you associate with summer?
What is it about summer that makes it hotter? What
happens to produce more heat?
• Beam Spreading
– Flashlight Circles, Beam Spreading (lab notebook pg
13, Globe demonstration
• Assess Progress
– Mid-summative Exam 3
• Self-Assessment
– Quick Write (part 1), Seasons and Sun (part 2), Midsummative assessment
– Review and discuss how their thinking has changed
and what they did in class to change their thinking
Weather and Water
Investigation #4
Heat Transfer
PART 1: HEATING THE EARTH
• Ask
– Do you think the surface of the earth affects how hot the
air gets? What is an earth material?
• Earth Materials Investigation
– Set up the earth materials, discuss predictions (#1-4
temperature questions)
– Collect data, graph data (within the axes!)
– Revise thinking, discuss (#5,6 temperature questions)
– Radiation, Differential Heating
• Multimedia
– Heat and Energy Animation
• Reading
– Thermometer: A Device to Measure Temperature, pre/post
question
Weather and Water
Investigation #4
Heat Transfer
Part 2: CONDUCTION
• Ask:
– Why do your feet feel hot on a sidewalk on a hot day?
• Energy Transfer Challenge
– Inquiry vs. Semi-guided
– How did heat transfer from the hot water to the cold water?
• Explain Conduction/Multimedia
– Record notes in lab notebook pg 17 (Heat Conduction)
• Discuss series of Energy Transfers
– White board flow chart
• Ask:
– Did you every reach for a metal spoon that was in a pot of cooking soup? How
did the handle get hot when it hasn’t been in the soup or fire?
• Conduction Investigation
• Bowtie Pasta Video
• Reading
– Heating the Atmosphere, questions following
• Assess
– Mid-summative Exam 4
Weather and Water
Investigation #5
Convection
PART 1: DENSITY OF FLUIDS
• Density demonstration bottles
– Why do the liquids behave this way?
• Layering Inquiry
– I have 4 liquids for you to investigate. The challenge is to layer all four
liquids in a section of straw.
– How is it that some salt solutions can be heavy and some light if they
are made with the same materials?
• Which is heavier gold or feathers?
– Foam and Beans Demo
– If both cups are the same size, how can one be heavier?
– Introduce density
• Determine density of the salt solutions
• Assess
– Response Sheet - Convection
• Reading
– Density, post reading questions
Weather and Water
Investigation #5
Convection
PART 2: CONVECTION IN WATER
• Review methods of heat transfer
– Light, radiant energy, visible light, UV, and infrared, conduction,
warmer to cooler
– Another method for liquids
• Water Inquiry
– Challenge: Make layers with plain water of different
temperatures
– Make predictions in lab notebook
– Successfully layer
– Observe again after 5 minutes-Why did this happen?
– Heat the bottom of the vial and explain what is happening
• Introduce Convection
• Reading
– Convection, pre/post questions
• Assess
– Collect Layering Hot and Cold Water Sheets
Weather and Water
Investigation #5
Convection
PART 3: CONVECTION IN AIR
• Ask:
– If the sun shines on a parking lot, and the blacktop absorbs
some of the radiant energy, what might happen to the part
of the atmosphere close to the parking lot?
• Convection Chamber Demonstration
– Explain set-up and what it is attempting to model
– Record observations
– Convection Cell
• Multimedia
– Convection animation
• Assess
– Collect Convection Chamber sheet from the lab notebook
• Assess
– Mid-summative Exam 5