Land vs Water Climate Investigation Coastal Climate Lab Graphing & Data Analysis
Why do coastal locations often have smaller temperature ranges than places farther inland?
In this hands-on Land vs. Water Climate Investigation, students collect their own temperature data to investigate how land and water heat and cool differently. Students then use their experimental evidence to explain how large bodies of water can influence the climates of nearby coastal areas.
The investigation begins with a real-world comparison of San Francisco, California and Wichita, Kansas—two cities located at approximately the same latitude but with very different relationships to large bodies of water. Students explore why San Francisco's location beside the Pacific Ocean can contribute to more moderate temperatures while inland locations may experience greater temperature ranges.
Students then conduct a controlled investigation using containers of land material and water placed under the same heat source. They measure temperature every two minutes during both a heating and cooling period, calculate temperature changes, create double-line graphs, and analyze the patterns in their own data.
Finally, students connect their classroom model back to real-world climate patterns and complete a Claim-Evidence-Reasoning (CER) response using numerical evidence from their investigation.
This investigation is designed to help students move beyond memorizing that “water heats more slowly than land” and actually collect evidence, graph the pattern, and use their data to explain climate.
WHAT'S INCLUDED
18 total pages:
9-page Student Investigation
Real-world climate reading: San Francisco vs. Wichita
Reading comprehension questions
Essential question
Materials list
Independent/dependent variables
Controlled variables
Student prediction
Experimental setup
Investigation diagram
Heating data table
Cooling data table
Temperature-change calculations
Data-analysis questions
Heating double-line graph
Cooling double-line graph
Graph-analysis questions
Cause-and-effect climate model
Coastal vs. inland climate application
Claim-Evidence-Reasoning assessment
Model evaluation question
9-page Teacher Answer Key
Suggested responses
Expected experimental patterns
Variable answers
Graphing expectations
Sample explanations
CER sample response
Suggested scoring
Guidance for student data that differs from the expected pattern
Because students collect their own measurements, the answer key appropriately provides expected trends rather than predetermined temperature values.
MATERIALS Per Group
2 identical cups or containers
Approximately 200 mL dry soil or sand
Approximately 200 mL water
2 thermometers
Timer
Lamp or other classroom heat source
Ruler
Calculator
Pencil
These materials were intentionally kept simple and inexpensive, making the investigation practical for middle school classrooms without specialized laboratory equipment.
SKILLS STUDENTS PRACTICE
This is one of the stronger selling points of the resource:
Planning and carrying out investigations
Identifying independent and dependent variables
Identifying controlled variables
Making scientific predictions
Collecting quantitative data
Repeated measurement
Calculating temperature change
Constructing double-line graphs
Selecting appropriate graph scales
Identifying patterns in data
Comparing rates of temperature change
Analyzing experimental error
Using numerical evidence
Connecting models to real-world phenomena
Claim-Evidence-Reasoning writing
Evaluating scientific models
SCIENCE CONTENT
Students investigate and reinforce:
Land vs. water heating
Land vs. water cooling
Heat storage in water
Coastal climates
Inland climates
Temperature range
Distance from large bodies of water
Climate factors
Weather vs. climate
Climate patterns
Scientific models
The resource also reinforces that distance from water is only one climate factor, alongside latitude, elevation, and topography.
