We’re going to study atoms, their parts, as well as how they work together. Are you ready? You can get started by watching this video:


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19 Responses to “Lesson 1: Atoms & Density (Video)”

  1. Sandra Fisher says:

    Why can’t we view this video?

  2. I am not sure – it’s playing fine on our systems over here. What if you hit PLAY then PAUSE and wait for it to load completely, then hit PLAY again?

  3. Marvette Owens-Freeman says:

    Why isn’t this video not working ? It keeps stopping and starting.

  4. Sorry – I meant to mention that in the video… I’ve updated the reading so it’s accurate, and included extra info about this. Thanks for your eagle eye!

  5. Kaelen Davis says:

    Aurora, in the density video, you said that the only reason you could think AU represented gold was because what you say when someone takes it from you. Actually, AU stands for “Aurum,” Latin for gold.

  6. Rebecca Anderson says:

    Hey, just wondering if there is an app or something that we can use to watch the videos onnour ipad? I was not able to get it to work. Thanks!

  7. Does what glow? If you’re asking about fluorescent light bulbs, the answer is yes!

  8. evangeline gregory says:

    If there’s electricity around something, does it glow ?

  9. Oops – that’s a typo on my part! Ag is for Silver, and Au is for Gold. Thanks for your eagle eye!

  10. Karen Pedersen says:

    Hi, we just watched the atoms and density video (we really liked the methane part!). We thought you might like to know that in the joke about gold you say it’s name is ag instead of au! Thanks, Kylie

  11. They will if you shake it up, but if you pour it carefully, it will just settle to the top. And as the water falls through the oil layer, the drops pick up a thin coating of the oil, making it slightly more buoyant than just plain water. When you try this at home, you’ll see the oil eventually detaches itself from the outer layer of the water drop and floats back up to the oil layer. (Check out the lava lamp experiment to see this in action!)

  12. Cynthia Petrides says:

    I was expecting the green water to mix with the blue water. Why didn’t they?

  13. If you think about it, the nucleus of an atom (proton and neutron) really have no reason to stick together. The neutron
    doesn’t have a charge, and the proton has a positive charge. And most nuclei have more than one proton, and positive-positive charges repel (think of trying to force two North sides of a magnet together). So what keeps the core together?
    The strong force. This force is the glue that sticks the nucleus of an atom together, and is one of the strongest force we’ve found (on its own scale). This force binds the protons and neutrons together and is carried by tiny particles called pions.

  14. Michele Floyd says:

    why does the proton and the nucleus stick together?

    ~ Liam Floyd

  15. We’re pretty sure there are more than currently on the periodic table – it’s a really great question you have. In fact, Ununoctium was found in 2006. The trouble with this massive elements is that they are unstable and only occur in a lab.

  16. Lisa James says:

    What if we have not discovered an element? How would we fit that in? Or are we sure there are no more?

  17. Yes, we’ve recently changed the way we’ve been recording so you’ll hear the all the new videos in both ears. it has to do with the way we recorded the ones in the past. Thanks for noticing!

  18. Deborah Gifford says:

    every time i watch the videos with headphones it only comes through my left ear. can you fix that please?