Recent content by stfaivus

Thank you! It is interesting that different people learn in different ways! I like the discussion you shared about the color of blood..

I am a high school science teacher working on arts integration for thirty years in schools where many students have academic skills below grade level. I am looking for feedback.

thank you for your comment. yes, I have stethoscopes and have also successfully used cups against students backs. I found a good video which explains what you are saying about how the heart works with the electricity and how the EKG signal creates the cycle. Thank you!

Thank you for the suggestions about including the EKG as another big indication of the heart's activity besides sound! The main point of this model and unit is to explore how the circulatory, respiratory and digestive systems work together to serve every cell. It is an overview model leading...

Thank you for that! I watched the video from the AHA several times. Although it did not directly address my question about the timing between the four chambers, I inferred the following. From the animation and sound at :11- :15, it looks like both sides contract and expand in unison. The...

Greetings I am a high school science teacher and music teacher. I am finishing a unit for high school biology and 5th grade science about the human body systems. I have a question about the heart. It involves timing. I heard that the sound of the heart comes from the closing of the valves...

To everyone that contributed to this thread: thank you, it's very interesting discussion. based on your comments, i finished a science arts video on NASA's lithograph of Earth's energy budget. Perhaps give your feedback. Do you think the video resolves some of our discussion...

Their accompanying slideshow (http://science-edu.larc.nasa.gov/energy_budget/pdf/EarthsEnergyBudget_Nov14_sm.pdf ) claims to show "earth's energy budget-A story". I also try to find and present the story of the greenhouse effect on my science arts website on climate change at...

Hi everyone, I asked to question to NASA and this was Dr. Lin Chambers wrote back: " Steven, Good questions. Have you found the Energy Budget Story slide set at: http://science-edu.larc.nasa.gov/energy_budget/ Though it does not address these specific questions, I think you will find it...

Hi, Thank you everyone on this thread! This seems an important and timely issue to get very clear on. My two initial questions are more clear now, especially from the slightly more detailed NASA energy flow diagram provided by DH on #9 and the interesting discussion throughout. The diagram...

Hi DrPapper, In the illustration, it shows 350 (Watts per meter squared) absorbed by the atmosphere. If this is all re-emitted, half up, half down, that accounts for 175 of the rising 195 from the atmosphere. That would also account for 175 of the descending energy. There's another 149 that goes...

The wiki article on the greenhouse effect (https://en.wikipedia.org/wiki/Greenhouse_effect) has a top illustration which shows the flow of heat and energy (Watts per meter squared) between outer space, the atmosphere, and Earth's surface. The illustrations shows that of the 519 in the...

Thank you.

does this means that air has strong absorption lines in the electromagnetic spectrum outside of the visible light?

when you write tRNA have a mass of about 25 kDa, is this a tRNA loaded with an amino acid? The Harvard bionumber website gives average amino acid in E. coli as 109 kDa, so it seems the loaded tRNA would be a lot more massive than 25 kDa. Also, the rate is not simply when the correct tRNA hits...