Science Experiments

Posts Tagged ‘video’

Question: What is Related Theory?

I’m doing a lab report and in the template given to us, there is a section for ‘Related Theory’ it says ‘it may contain the explainations outlining the theoretical principals of the experiment, definitions, equations, etc.’ can anyone translate this into understandable english? the lab is on what was seen in pond water.

Answer: This is actually kind of tough, because the teacher might have a different way of defining this as me. But I think it’s just a section where you put the main ideas of the experiment. Any terms in your textbook on the subject that are in bold text might be well used here.

To be safe, I wouldn’t quite make it like a list of theories, key words, and big ideas. I would just try to do 2-5 simple sentences, stating that these ideas tie in, and briefly explaining how.

EX: In our experiment, we took ice, melted it into water, and then boiled it into a gas. This deals with the three states of matter, energy transferrance, and kinetic, potential and thermal energy. (obviously, a different experiment, but you get the idea).

Start with chapter/unit headings in the textbook, and see if ou can make little sentences with those that summarize what is going on.

STS-127 Launch HD

Question: Growing flower from seed for science experiment?

Can someone tell me an easy flower for a 12 year old girl to grow from the seed for a science experiment? It will involve watering 4 containers (6″ wide and 7″ deep) with different liquids. Please name as many as you can seeing how this depends on what’s available at the store.

Answer: Some suggestions…

*marigold (Calendula)
*nasturtium
*borage, has small seeds though
*black-eyed susan (grows as a vine)
*sweet pea
*cosmos

have fun!

Jen and Theo’s Science Experiment- Food sun protection

Question: In a science experiment, does there always have to be 3 trials done?

I am doing my science fair experiment for the science fair and my project is to see how the amount of water affects how well popcorn will pop.

I don’t really see what the use of doing 3 trials for each is. How am I going to change something for 3 trials?

Answer: Three is the magic number because that is the minimum number of replicate samples you need to compute a mean and standard deviation.

The idea is not to change things three times, the idea is to do the exact same thing three times and see how the result changes. So in your case you might ad 100 g of popcorn and 50 mL of water and get 80% of the kernels popped at the end. So the second time you add 100 g of popcorn and get 50 mL of water and get 95% of the kernels popped. Do it a third time the same way and get 87% of the kernels popping. So you can now say that on average, with 100 g of popcorn and 50 mL of water, you would get 87% +/- 8% of the kernels popping.

If you only have two trials you can’t compute a standard deviation.

Popcorn Science Project