Science Experiments

Archive for December, 2007

Question: sound experiments for high school science fair?

is there any good sound experiments i could do for school?

Answer: i reccomend the effects of sound waves preferebly a 50 decible pulse at 60bpm on the effects of plant growth

Bernoullies principle video physics experiments Ravish High School physics project application

Question: help with science assessment?

i have an science assessment and you have to write a report type of thing on an experiment i did you have to do the title background aim method results etc but i don’t know what they mean on background i asked my teacher but i forgot what he said but i know its nots like a background like a coloured background its not that its something else what do they mean on background?

Answer: I think you are referring to a science practical report, “prac report” for short. In a prac report, you must include the following:

Title: The experimental title, date, prac partner, and prac number at the top of the report.
Aim: Details what is to be done and outlines how this will be achieved
Hypothesis: Prediction of results with the reasons for prediction
Safety Considerations: Risks that may be involved when doing this practical task and suggestions on how to mitigate them
Apparatus: List of the materials needed during the practical task in point form (including how many of each)
Method: The steps as to how you completed the practical task in point form or number form
Results: Present the results of the experiment in a logical format (table, etc.) and describe how to interpret the results
Observations: Make a detailed observation on the results, highlighting anomalies and suggestions on why that could be
Assumptions: Any assumptions made during the practical task and how they can affect the overall result
Discussion: Answering a list of questions to show your understanding of the practical task
Conclusion: The response to the aim of the practical task (can be just one or two sentences long)

The “background” you mentioned is probably referring to the background of the whole task, or a brief outline. In formal reports, this is not actually given as a specific category, but amalgamated within the headings listed above, especially the aim and the method.

Hope this helps.

Linda Darling-Hammond on Performance-Based Assessment

Question: How do I use paraffin wax?

For a science experiment, I have to attach a thumbtack to a metal rod using paraffin wax. But I don’t even know what paraffin wax IS, let alone how to use it! Is it a solid that I just mold around the ends of the two objects, or do I melt it then drip it on?
THANKS!!

Answer: You can get paraffin was for a paraffin bath. In therapy, we use if for patients who have arthritis pain in their hands. The container melts it and then you dip their hands in it about 3 times and wrap them in towels and a plastic bag and sit for about 15 minutes to help with the pain.

You would probably do the same to the thumb tack, either dip the thumbtack into the hot wax a few time and then hold it against the metal rod or drip it between them. Safer to dip and hold til dry. It doesn’t take long as the air cools it pretty quickly.

Sculpting in Solid Mercury, with Liquid Nitrogen (Popsci.com + BB Video)