Science <3 by hidden meister

Science <3 by hidden meister https://padlet.com/awarethebear/SchoolScience Made with the force of school Teeehee en-us 2020-07-10 09:30:39 UTC 2024-06-08 03:26:23 UTC hello@padlet.com https://padlet.net/icons/png/1f3eb.png What is a solid ? awarethebear https://padlet.com/awarethebear/SchoolScience/wish/651670129

In the solid state the vibrating particles form a regular pattern. This explains the fixed shape of a solid and why it can’t be compressed or poured.

]]> 2020-07-10 09:38:06 UTC https://padlet.com/awarethebear/SchoolScience/wish/651670129 What is a liquid ? awarethebear https://padlet.com/awarethebear/SchoolScience/wish/651672715 In a liquid the particles still touch their neighbours but they move around, sliding over each other. This is why you can pour, but not compress, a liquid.]]> 2020-07-10 09:44:42 UTC https://padlet.com/awarethebear/SchoolScience/wish/651672715 What is a gas ? awarethebear https://padlet.com/awarethebear/SchoolScience/wish/651673153 In the gas state, widely-spaced particles move around randomly. This explains why you can compress gases and why they flow.]]> 2020-07-10 09:45:47 UTC https://padlet.com/awarethebear/SchoolScience/wish/651673153 awarethebear https://padlet.com/awarethebear/SchoolScience/wish/651674864 2020-07-10 09:50:56 UTC https://padlet.com/awarethebear/SchoolScience/wish/651674864 State changes awarethebear https://padlet.com/awarethebear/SchoolScience/wish/651676788 Heat must be supplied to a substance for it to melt, evaporate or boil. For example, you need to heat ice to melt it, and you need to heat water to make steam.
Heat must be removed from a substance to condense or freeze it. In other words, the substance must be cooled down.

]]> 2020-07-10 09:56:58 UTC https://padlet.com/awarethebear/SchoolScience/wish/651676788 awarethebear https://padlet.com/awarethebear/SchoolScience/wish/651677030 Under certain conditions, some solids turn straight into a gas when heated. This process is called sublimation. A good example is solid carbon dioxide, also called ‘dry ice’. At atmospheric pressure, it turns straight into gaseous carbon dioxide.

Liquid carbon dioxide can only exist under high pressure, such as in fire extinguishers. Iodine also sublimes - it turns directly from shiny purple-black crystals to a purple vapour when warmed up.

]]> 2020-07-10 09:57:38 UTC https://padlet.com/awarethebear/SchoolScience/wish/651677030 awarethebear https://padlet.com/awarethebear/SchoolScience/wish/651677123 Changing the pressure
A gas will also liquefy (turn into a liquid) if its pressure is increased enough. This is because the particles are moved close enough for bonds to form between the particles.

Gas cylinders used for camping stoves and barbecues contain liquefied petroleum gas (LPG) under high pressure. As soon as the pressure is released, the liquid turns back to a gas.]]> 2020-07-10 09:58:01 UTC https://padlet.com/awarethebear/SchoolScience/wish/651677123 awarethebear https://padlet.com/awarethebear/SchoolScience/wish/651678901 2020-07-10 10:03:05 UTC https://padlet.com/awarethebear/SchoolScience/wish/651678901 awarethebear https://padlet.com/awarethebear/SchoolScience/wish/651679560 2020-07-10 10:04:54 UTC https://padlet.com/awarethebear/SchoolScience/wish/651679560 awarethebear https://padlet.com/awarethebear/SchoolScience/wish/651679775 2020-07-10 10:05:36 UTC https://padlet.com/awarethebear/SchoolScience/wish/651679775 awarethebear https://padlet.com/awarethebear/SchoolScience/wish/651679884 2020-07-10 10:05:57 UTC https://padlet.com/awarethebear/SchoolScience/wish/651679884 awarethebear https://padlet.com/awarethebear/SchoolScience/wish/651681410 2020-07-10 10:09:38 UTC https://padlet.com/awarethebear/SchoolScience/wish/651681410 awarethebear https://padlet.com/awarethebear/SchoolScience/wish/651689612 2020-07-10 10:34:28 UTC https://padlet.com/awarethebear/SchoolScience/wish/651689612 awarethebear https://padlet.com/awarethebear/SchoolScience/wish/651689982 2020-07-10 10:35:39 UTC https://padlet.com/awarethebear/SchoolScience/wish/651689982 awarethebear https://padlet.com/awarethebear/SchoolScience/wish/651691268 2020-07-10 10:39:49 UTC https://padlet.com/awarethebear/SchoolScience/wish/651691268