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Factors Influencing Snowflake Falling Time - Coggle Diagram
Factors Influencing Snowflake Falling Time
Variables
Dependent Variables:
The falling time of snowflakes
Controlled Factors:
The object material and shape
Starting height
Liquid volume
Independent Variables:
Liquid density
Cross-sectional area
Hypotheses
cross-sectional area of the snowflakes has an affect on the snowflake falling time
liquid density has an affect on the snowflake falling time
Materials
Glue
Rubber blocks (different cross-sectional areas)
Glycerin
Stopwatch, ruler, measuring cups
Purified water
Experiments
Same liquid and different cross-sectional areas
1.65cm^2 (median area)
1.21cm^2 (lower area)
2.2cm^2 (higher area)
Same cross-sectional area and different liquids
Glue(median density )
Glycerin(higher density)
Purified water(lower density )
Evaluation and Improvements
Advantages:
Team cooperation
enhanced the tacit understanding
cultivated the spirit of team cooperation
Limitations:
measurement errors
use precise tools
unaccounted variables(e.g., liquid mass)
add more density groups
Few repetitions
Increase repetitions
Analysis and Principles
Cross-sectional Area
Larger area increases drag force
Reduces acceleration and increases falling time
Liquid Density
Higher density increases buoyancy and drag
Slows falling time