The Scientific Method

Topics: Scientific method, Hypothesis, Observation Pages: 2 (709 words) Published: May 17, 2014


The Scientific Method

This experiment was performed by using a systematic approach to identify six unknown substances. In the first half of the experiment six unknown substances were observed than measured by determining volume, mass and density. The second half of the experiment the unknown were placed in a test tube and tested for solubility. It was determined that the six tubes contained coffee, potting soil, brown sugar, baby powder, baking soda, and powdered sugar. By the use of the scientific method each unknown subject could be identified.

Hypothesis:
The contents of unknown samplers are as follows: #1 coffee, #2 potting soil, #3 brown sugar, #4 baby powder, #5 baking soda, #6 powdered sugar.

Material List:
Digital Scale
50 ml Cylinder
Safety Goggles
Spatula
6 Test Tubes
Magnifier
Rubber Stopper
Test Tube Rack
Marking Pencil
Test Tube Cleaning Brush

Procedure: The unknown substances were removed from a bag. Next, volume, density, and mass were calculated using small paper boats, a digital scale, and a formula which called to divide the mass by the volume. Then, the texture, shape and appearance of each substance was observed and recorded. Lastly, each substance was tested for solubility in distilled water.

Scientific Method Data Table 1
Unknown Sampler
1
2
3
4
5
6
Hypothesis
Coffee
Potting Soil
Brown Sugar
Baby Powder
Baking Soda
Powdered Sugar
Color
Brown
Dark Brown
Light Brown
White
White
White
Texture
Rough
Clumps, rocky
Gritty
Soft/Smooth
Soft/Smooth
Soft/Smooth
Shape
Small particles, visible
Large Particles
Very small particles, amorphous
Very small particles
Large particles
Visible particles
Smell
Coffee beans
Dirt
Food/spice
Baby powder
No smell
No smell
Soluble
Yes
No
Yes
Yes
Yes
Yes
Density
.31
.3
.3
.61
.4
.46
Conclusion
Correct
Correct
Correct
Correct
Unsure
Unsure

Data Table 2: Calculating Density of Unknown Samples
Mass of Unknown...
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