Tuesday, 30 September 2014
While testing our weather station, we realised that all our equipment was too heavy to take off. This proved to be a huge barrier to get over as we wanted to ensure that our equipment stays safe. Thus, we altered the design a bit and we managed to make it take off soon enough.
Saturday, 20 September 2014
- We will need to ensure that our balloon does not fly up too high in the sky such that the balloon is lost and interferes with Singapore Air Safety regulations (http://www.caas.gov.sg/caas/en/Regulations/Airspace_Management/Air_Navigation_Hazard_x_Obstruction_Policies/Hot_Air_Balloon_Operations.html).
- The balloon may burst due to the tension the helium gives.
- We have never worked with helium before, so we have to be extremely cautious.
- Inhaling helium can cause oxygen deprivation and too much of this may lead to brain damage
- It is extremely important to be cautious of the weather (sudden downpour / lightning) as it will be disastrous if lightning strikes our weather balloon and we would get electrocuted in the process.
- Letting go of the balloon will lead to pollution
Thursday, 31 July 2014
Drop Test 2 (With Egg): 29 July 2014
Saturday, 5 July 2014
Friday, 4 July 2014
Thursday, 3 July 2014
(HowsStuffWorks) Humidity is the percentage of water vapour in the air and it also affects the air pressure as shown above. Humidity can be measured in many different ways, but relative humidity is the most common. Relative humidity is the ratio of the current absolute humidity to the highest possible absolute humidity (which depends on the current air temperature). Absolute humidity is the mass of water vapor divided by the mass of dry air in a volume of air at a given temperature. The warmer the air is, the more water vapour it can contain. A reading of 100% relative humidity means that the air is totally saturated with water vapor and cannot hold any more, creating a high possibility of rain. This doesn't mean that the relative humidity must be 100 percent in order for it to rain -- it must be 100 percent where the clouds are forming, but the relative humidity near the ground could be much less (HowStuffWorks, 2014).
Weather balloons are high altitude balloons that are sent into the atmosphere whilst carrying instruments called the radiosonde to measure the weather (humidity, temperature, wind velocity etc). The balloon itself is usually made of high latex material and lifted up into the air with hydrogen due to cost constraint. Weather balloons are made of special rubber made to withstand extreme temperature drop (Aberdeen, 2007)
Wednesday, 2 July 2014
Dependent Variable: Atmospheric humidity, temperature, pressure, air quality
Independent Variable: Weather, altitude of test (on land or in air)
Controlled Variable: Height of balloon in air, Location tested, Type of balloon
Hypothesis: The humidity, temperature, pressure and air quality will change with the weather. The results will differ from the land and the air.
Tuesday, 1 July 2014
|Steps of the Scientific Method||Detailed Help for Each Step|
|Ask a Question: The scientific method starts when you ask a question about something that you observe: How, What, When, Who, Which, Why, or Where?|
And, in order for the scientific method to answer the question it must be about something that you can measure, preferably with a number.
|Do Background Research: Rather than starting from scratch in putting together a plan for answering your question, you want to be a savvy scientist using library and Internet research to help you find the best way to do things and insure that you don't repeat mistakes from the past.||Background Research Plan|
|Construct a Hypothesis: A hypothesis is an educated guess about how things work:|
"If _____[I do this] _____, then _____[this]_____ will happen."You must state your hypothesis in a way that you can easily measure, and of course, your hypothesis should be constructed in a way to help you answer your original question.
Variables for Beginners
|Test Your Hypothesis by Doing an Experiment: Your experiment tests whether your hypothesis is supported or not. It is important for your experiment to be a fair test. You conduct a fair test by making sure that you change only one factor at a time while keeping all other conditions the same.You should also repeat your experiments several times to make sure that the first results weren't just an accident.||Experimental Procedure|
Conducting an Experiment
|Analyze Your Data and Draw a Conclusion: Once your experiment is complete, you collect your measurements and analyze them to see if they support your hypothesis or not.Scientists often find that their hypothesis was not supported, and in such cases they will construct a new hypothesis based on the information they learned during their experiment. This starts the entire process of the scientific method over again. Even if they find that their hypothesis was supported, they may want to test it again in a new way.||Data Analysis & Graphs|
|Communicate Your Results: To complete your science fair project you will communicate your results to others in a final report and/or a display board. Professional scientists do almost exactly the same thing by publishing their final report in a scientific journal or by presenting their results on a poster at a scientific meeting. In a science fair, judges are interested in your findings regardless of whether or not they support your original hypothesis.||Final Report|
Science Fair Judging