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Science Project

Vi H.
by

Vi Ho

on 10 January 2013

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Transcript of Science Project

Vi H. Jan 14. 13 How different types of metal affects the time it takes to melt ice Discussion of Results The problem being studied in this experiment was how does the type of metal affect the time it takes to melt an ice cube? It was proposed that if copper is used then the time it takes to melt an ice cube will decrease. This is a relevant question formed from the observation that copper is a good conductor for heat. If the hypothesis is correct, the results SHOULD show that copper had the lowest time average . The data in this experiment ACTUALLY showed that copper had the lowest time average. These results made sense because when research was being done about different types of metal, it is known that copper is a good conductor of heat.
The results of this experiment were determined to have high reliability because 3 trials were completed and all trials yielded similar results. In addition, the experiment was determined to be valid because the intent of the project was to show the relationship between metal and the time it takes to melt an ice cube and the experiment accomplished that goal. Sources of error in this experiment include the different ice cube sizes. These errors could be avoided in the future by making my own ice cubes with exact measurements. Abstract The goal of this experiment was to find out if the metal has anything to do with time. To find out if the metal does affect the time it takes to melt ice cubes, an experiment was developed with the scientific question of how the different types of metals affect the time it takes to melt ice cubes. The independent variable was changed by copper, brass, tin, and steel and the dependent variable was changed by minutes.
The experiment’s hypothesis was If copper is used then the time it takes to melt an ice cube will decrease. The materials used in the experimental were ice cubes, metal, and a timer. The experimental procedures were to put ice cubes on each pieces of metal and time to see how fast it takes to melt each ice cube.
The results collected during this investigation were copper was the best conductor of heat while tin was the worst. The results showed that the hypothesis was If copper is used then the time it takes to melt an ice cube will decrease was supported
Some errors that may have occurred in the experimental were the size of the ice cubes. To further understanding of this topic, future research could include more metals. Experimental Design Experimental question: How does the type of metal affect the time it takes to melt an ice cube?

Hypothesis: If copper is used then the time it takes to melt an ice cube will decrease because copper is a good conductor of heat.

Operational definition of Dependent (Time) Variable is Minutes

Operational definition of independent (Metal) Variable is Copper, Tin, Steel, Brass Data Tables and Graphs Background Research There are currently 86 known metals. The first two metals to be used widely were gold and copper. There were seven metals gold, copper, silver, lead, tin, iron, and mercury. These metals were known as the Metals of Antiquity. These metals were known in Mesopotamia, Greece, Rome, and Egyptians. The Metals of Antiquity were discovered between 4200 and 750 B.C. Metals were used for coins and gemstones. There were many uses for metals. How about melting ice.

Metal is known as a good conductor of electricity, but how about attracting heat? There is no such thing as heat being attracted to anything, but metal does have a high thermal conductivity. This means that metal can conduct heat from its surroundings, making the ice cube melt faster. The purpose of this project is to see which kinds of metals, with the highest thermal conductivity, are able to melt ice faster.

The intent of this project is to see how metal affects the time to melt ice. The variable to be tested and changed is the time it takes to melt the ice. Any changes will be noted by timing the how long it takes. The research will show that different metals might be better at attracting heat, thus making the ice melt faster. Conclusion Analysis of the results revealed that copper had the lowest time average meaning it was able to conductor more heat than the other metals. These results make sense because copper is known to be a good conductor of heat. The hypothesis If copper is used then the time it takes to melt an ice cube will decrease was supported because research has shown copper is a good conductor of heat.

By completing this experiment I learned that tin is not the best heat conductor. This information is important because if there is any need to conductor heat, then I would know not to use tin. Future research about this topic is if salt water ice cubes and plain water ice cubes melt faster on a copper plate. Works Cited about.com. Anne Marie Helmenstine, Ph.D, 2012. Web. 13 Sept. 2012. <http://chemistry.about.com/od/elementfacts/a/iron.htm>.

Metal. Copyright 1998-2012 Dr. Karen Carr, n.d. Web. 05 Sept. 2012. <http://www.historyforkids.org/scienceforkids/chemistry/metals/>.

Science Kids Fun Science and Technology for Kids. Science Kids, Aug. 2007. Web. 04 Sept. 2012. <http://www.sciencekids.co.nz/sciencefacts/metals.html>. Procedures 1. Safety considerations: Don’t run with scissors
2. Materials: Ice cubes, Metal platforms, Timer
3. Experimental design (explain IN DETAIL HOW YOU WILL SET UP YOUR EXPERIMENT! What will it look like? Where will stuff go?) There will be four metal platforms, placed a few inches away from each other. I will put in ice cube on each metal platform and time it to see which one melts faster.
4. Step by step instructions:
A.) Place the metal platforms on a flat surface.
B.) Place one ice cube on each metal piece.
C.) Make sure to identify all metals before starting.
D.) Take safety precautions.
E.) Start timing.
F.) Be careful and observe.
G.) After the experiment is over, clean up.
H.) Record the results on the table.
I.) Repeat the experiment 2 more times.
J.) Record afterwards. Variables 1) Control variable #1: size of the metal
This variable will be controlled by making sure to have metal platforms that are the same size.
2)Control variable #2: Temp. of the room
This variable will be controlled by making sure the room temperature in appropriate for this project.
3) Control variable #3: size of the cube
This variable will be controlled by making sure the ice cubes are the same size, if they aren’t then it will affect the time it takes to melt
4) Control variable #4: Light
This variable will be controlled by Making sure the light won’t affect the temperature.
5) Control variable #5 : Air
This variable will be controlled by making sure the wind or air conditioner doesn’t affect the temperature. Identifying Variables Dependent Variable Time

Operational definition of Dependent (Time) Variable is Minutes

Independent Variable: Metal

Operational definition of independent (Metal) Variable is Copper, Tin, Steel, Brass
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