4th Form SBAs

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Hello 4th Formers!

Here you will be able to access all SBA write ups. Feel free to ask me any questions or make any comment here.

SBA #1

SBA #:                   1
Title:                     Density
Aim:                      To find the density of an irregularly shaped object
Apparatus:          Stone, water, displacement can, measuring cylinder, triple beam balance.
Diagram:  

           

Procedure:

1.       Find the mass, m, of the stone using the balance.

2.       Fill the can and allow to drain on a level surface.

3.       Place the spout into a measuring cylinder and gently lower the stone until it is completely immersed in the water.

4.       Determine the volume, V, of the displaced water collected in the measuring cylinder at eye level.

5.       Repeat the procedure until a consistent answer for the volume is obtained.

Data Collected

(Display your results in a suitable format)

Data Analysis

1.       What can you say about the volume of the stone and the volume of the displaced water?

2.       Calculate the density of the stone.

3.       Calculate the relative density of the stone.

Conclusion:

Write a suitable conclusion which reflects your aim.

Plan and Design #1

Plan and design an experiment which can be used to determine the volume of glass needed to make a test tube.

Date Given: 23rd Wednesday, 2014
Due Date of Draft: 7th May, 2014

SBA #2

Date:                     30^th April 2014

SBA no.:               #2

Title:                     Waves on Springs

Aim:                      To observe the production of waves on springs (slinky)

Apparatus:          Slinky

Procedure:

1.       Hold the slinky on each end. Let one person produce the wave while the other person holds the other end stationary.

2.       Hold the slinky on the benchtop and send a pulse along the wave by moving hand in and out. Move hand in and out continuously and record observations.

3.       Hold the slinky on the benchtop and move hand left to right continuously and record your observations. Increase the rate of the vibration by moving the hand faster and observe the difference. Increase the distance moved by vibrating hand and observe the difference.

4.       Hold the slinky above the ground and move hand up and down continuously at a moderate rate. Record your observations.

5.       Hold the slinky above the ground and move hand up and down continuously at an extremely fast rate. Record your observations.

Results:

Draw diagrams showing your observations and label the direction in which energy is transferred and the direction of vibration.

Data Analysis:

1.       After a wave has passed what is the resultant displacement of the particles in the slinky?

2.       Label your diagrams to indicate which observations show transverse and which show longitudinal waves.

3.       On appropriate diagrams label:

a.       Crests and troughs

b.      Compressions and rarefactions

c.       λ, the wavelength of each wave

4.       What is the kinetic energy produced by the vibrating hand converted to?

5.       State what changes, if any, occur in the frequency and period of the wave when:

a.       We increase the rate of vibration

b.      We increase the distance moved by the vibrating hand

Conclusion:

Write an appropriate conclusion stating what you learnt.

Due Date: 2nd May, 2014

Format for Plan and Designs

Plan and design experiments give you the chance to be creative and to put your scientific knowledge to work. For plan and designs, you will be given a problem or scenario for which you will create an experimental solution. All of your plan and designs should follow the following format:

SBA no.
Title:
Problem Statement (which will be given to you)
Hypothesis:
Aim:
Materials and Apparatus:
Identification of Variables (Constant, Manipulating, Responding)
Clear and concise step by step procedure (Must be written in command form)
Expected results
Assumptions/Precautions/Limitations.

Good luck folks!