Lab Report

How to get the most points out of a lab evaluation.

Parts of the Lab Report• Design

– Problem/ Hypothesis– Variables– Data Collection

• Data Collection and Processing– Recording– Processing– Presenting

• Conclusion and Evaluation– Concluding– Evaluating– Interpreting

• Manipulative Skills– Following the instructions–Carrying out techniques–Working safely

Designing

Sample 1• Problem:

– To identify the objects given by calculating their density

• Variables:– Independent: material of the object, scales

used, human error– Dependent: mass of the object, volume of the

object, density of the object

• Materials: 9 objects and water

•Equipment: Scales (2), beaker, ruler, calculator

Design Analysis

Design C P N

Define problem/ select variables XXX

Controlling Variables XXX

Developing method collection data XXX

Data Collection and Processing

Data C/ P Sample 1RAWDATA

Obj 1 Obj 2 Obj 3 Obj 4 Obj 5 Obj 6 Obj 7 Obj 8 Obj 9

Description

Black rectangle, shiny flecks

Coppercolored block

Clear acrylic cylinder

Aluminum block

Brassblock

Corkrectangle

WoodeBlock

Rubberblock

IronBlock

Mass 1 1.8 g 8.5g 1.6 g 2.5 g 7.4 g .3 g .4 g 1.3 g 6.4 g

Mass 2 1.7g 8.4 g 1.4 g 2.4 g 7.3 g .5g .5 g 1.2 g 6.5 g

Volume 1

1 ml-1 1 ml-1 .5 ml-1 1 ml-1 1 ml-1 2 ml-1 1 ml-1 1 ml-1 1 ml-1

Radius ----- ------- .625 cm -------- ------ --------- --------- -------- -------

Depth .4cm .9 cm ------ .9 cm .95cm .6 cm 1 cm .9 cm 1 cm

Height 1.1 cm 1 cm .9cm .9 cm .95cm 1.9 cm 1 cm .9 cm 1 cm

Width 2 cm .9cm --------- .9cm .95cm 1.2 cm 1.1 cm 1 cm 1cm

Data C/Processing Sample 1PROCESS

DATAObj 1 Obj 2 Obj 3 Obj 4 Obj 5 Obj 6 Obj 7 Obj 8 Obj 9

Ave Mass 1.75 g 8.45 g 1.5 g 2.45 g 7.35 g .4 g .45g 1.25 g 6.45g

Volume 2(D xWx H)

cm3

.88cm3 .81cm3 1.104 .729cm3 .857cm3 1.368 1.1cm3 .81cm3 1cm3

Density 1M/V1

1.75g/ml

8.45g/ml

3g/ml 2.45g/ml

7.35g/ml

.2g/ml .45g/ml 1.25g/ml

6.45g/ml

Density 2M/ V2g/cm3

1.99 10.43 1.36 3.36 8.58 0.29 0.41 1.54 6.45

Data C and P Analysis

Data Collect/Process C P N

Record XXX

Process XXX

Present XXX

Conclusion and Evaluation

Conclusion/ Evaluation• Using the densities I calculated in the lab I

identified 8 of the 9 objects. They are as follows:– Object 1: ????? - Object 6: Cork– Object 2: Brass - Object 7: Wood– Object 3: Acrylic - Object 8: Rubber– Object 4: Aluminum - Object 9: Iron– Object 5: Nickle

I was able to correctly identify some of the objects, but in most cases my densities were slightly different for that object. If I could do this again I would re-calibrate the scales every use and try to cut out human error by having more than two people collecting data.

Conclusion/ Evaluation Analysis

Con/Eval C P N

Concluding XXX

Evaluating Procedure XXX

Improving the investigation XXX

Manipulative Skills

Manipulative Skills Analysis

Manipulative Skills C P N

Following instructions XXX

Carrying out Techniques XXX

Working safely XXX