How Fast Does Ice Melt

How Fast Does Ice Melt? Water Evaporate?

Experimental Design

Objective:

Students will work in groups to investigate the phase changes of the Water Molecule and create a visual representation (graph or chart) of how fast their ice melts.

Skills:

observation, measurements, following directions, inference, collecting and graphing data, cooperative learning

Materials:

-Safety Goggles

-300 mL of ice

-Hot plate / heat source

-Stirring rod

-Stopwatch

-Glass Beaker / jar that can withstand heat from your heat source

-Thermometer

Please do not turn up the heat source any hotter than 400 ̊C

Procedure:

Assign each member of your group one of the following responsibilities:

-Group Leader - Keeps the group on task / makes sure the assignment gets completed / writes down observations after every minute. Also in charge of getting and returning any materials.

-Time Keeper - Keeps track of time.

-Data Collector - Using proper organizational skills, the data collector writes down the data to be placed in the graph later on.

-Graph Expert – As the data is collected, the graph expert works cooperatively with the data collector to come up with a graph representing the teams data.

2) Develop a hypothesis about how long it will take for the ice to

completely melt.

1)  Begin your experiment by making and recording all observations at while measuring the temperature of the ice at one minute intervals. Begin with a starting temperature.

2)  Create a chart, collect your data, then graph your results.

3)  Conclude your findings. (3-5 sentences)

4)  Once the ice is melted, develop another experiment using the scientific method on how long it will take for the water to begin to evaporate. (Remember to include a hypothesis and a conclusion)

5)  Continue making your observations and taking the temperature every minute.

6)  Collect your data and graph your results

7)  Clean-up as you go. Remember to shut off and unplug your heat source.

8)  Submit your write-up at the end of the period.