• HiddenLayer555@lemmy.ml
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    9 hours ago

    That glass is a liquid at room temperature, just a very viscous one so it doesn’t appear to flow. It’s not. It’s not a crystalline solid so it has an internal structure similar to a liquid, but the structure is definitely solid at room temperature because the components are not capable of moving relative to each other like a liquid would.

    • Krelis_@lemmy.world
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      7 hours ago

      It’s also not the reason church windows are thicker at the bottom, a common myth that my ex-colleague with a PhD in polymer chemistry(!) somehow bought into

  • stinky@redlemmy.com
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    16 hours ago

    Some children are taught in school that God created the earth. Some of us were allowed to learn that humans cannot effect climate change, allowed to discuss it openly, and allowed to graduate with that idea without ever being corrected. Children are being taught today that slavery and colonialism were good things for some people.

  • MasterFlamingo@lemm.ee
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    1 day ago

    It was false then but my seventh and eighth grade science teacher told us that blood was blue. My mom was a nurse so I knew that it was bullshit but was definitely confused because he was my science teacher.

  • frozenspinach@lemmy.ml
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    17 hours ago

    I had a substitute teacher who saw the Swift Boat Veterans For Truth ads against John Kerry and repeated it to the class like it was 100% fact.

  • Nikls94@lemmy.world
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    24 hours ago

    That fluoride and vaccines are bad for you… tbh, I only believed it for 2-3 weeks until I did my own research, but it was a frightening clarification. Didn’t believe that teacher a single word after that.

    • turnip@sh.itjust.works
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      24 hours ago

      I think people underestimate the problems with teeth hygiene. It can cause dimensia, so teeth should be brushed before you eat, though avoid mouth wash.

      • Nikls94@lemmy.world
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        24 hours ago

        And don’t forget to floss! As soon as I learned that my gums don‘t bleed because of the metal thing, but because food between my teeth decays and that decaying decays my gums, turning it all into poop, I started to floss every second day.

        Why should I avoid mouth wash though? My routine is floss - mouth wash - brushing

  • ilinamorato@lemmy.world
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    1 day ago

    I have one that was proven false, and then later re-proven true: the existence of the brontosaurus.

    When I was in elementary school, we were taught that they existed, they were big, etc. Then, at some point while I was in college, I discovered that actually what we thought was a brontosaur was a brachiosaur or an apatosaur. And then, when my kids went to school and learned about the brontosaur, I discovered that actually, they did exist!

    • stinky@redlemmy.com
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      16 hours ago

      I tried to argue this with a science teacher who chose that specific material for a question about phases, and I assumed she was asking for this tricky reason. She marked me wrong and wouldn’t accept my personal research on the topic as makeup. I was humiliated. I hope she’s dead now.

  • invertedspear@lemm.ee
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    24 hours ago

    The moon was spun out of the same stuff as the earth. That was fact in the early years of my education. A few years later there were multiple theories: co development, captured a wandering planetoid, the Thea impact, and a fourth one I can’t remember but I think it was something dumb like planetary mitosis. By the time I graduated the Thea impact was considered the only viable theory.

  • Horsey@lemmy.world
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    1 day ago

    By the time I was in school the Bohr model was already proven inaccurate, but was taught anyway because the orbital model is too esoteric for teenagers 🙄.