[email protected]: Snowballs

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[email protected]: Snowballs
Objective: Students will be able to gather, analyze and graph data.
Next Generation Science Standard: 07-PS1-2 Analyze and interpret data on the properties of
substances before and after the substances interact to determine if a chemical reaction has occurred.
Task:
1.
2.
3.
4.
5.
Use a measuring device to form three snowballs of different diameter. (for example: 2inches,
4inches, and 6inches)
Record your observations of each snowball’s diameter in the 0 min row.
Place each snowball on a separate plate inside and start a timer. Record the diameter every five
minutes for each for a total of 30 minutes or until the snowball has melted (if before).
Use the data to construct a line graph. Each snowball should be given its own line. Be sure to
use a key to indicate the line for each snowball. The independent variable is time (x-axis) and
the diameter is the dependent variable (y-axis).
Explain what type of reaction has taken place. (physical or chemical)
Time (minutes)
0 min (beginning)
5
10
15
20
25
30
Snowball 1
Snowball 2
_____________________ (Title)
(DV)
_______________ (IV)
Snowball 3
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