Reversible & Irreversible Change by Damien Macdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe connecting the dots between the different types of change. en-us 2024-11-20 01:18:10 UTC 2024-11-20 02:57:53 UTC hello@padlet.com https://padlet.net/icons/png/1f504.png changes in materials and substances damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225241762 2024-11-20 01:20:17 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225241762 Reversible Changes damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225243922 2024-11-20 01:21:26 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225243922 Irreversible Changes damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225244426 2024-11-20 01:21:43 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225244426 damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225245476 No new substances are formed when a material undergoes a reversible change. 

]]> 2024-11-20 01:22:20 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225245476 damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225245795 The change can be undone and the material can return to its original state.

]]> 2024-11-20 01:22:31 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225245795 damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225246015 Reversible changes often happen because of changes in temperature.  They happen by adding or removing heat. 

]]> 2024-11-20 01:22:39 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225246015 damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225290505 New substances are formed when a material undergoes a chemical reaction.

]]> 2024-11-20 01:48:31 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225290505 damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225290884 Chemical reactions alter the original materials composition.   

]]> 2024-11-20 01:48:41 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225290884 damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225291301 The material or substance cannot return to its original state (mostly).

]]> 2024-11-20 01:48:56 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225291301 damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225291575 Irreversible changes often produce heat, light, gas, and other forms of energy.

]]> 2024-11-20 01:49:08 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225291575 Example damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225296299 Mixing bicarb soda and vinegar creates a chemical reaction that produces gas (carbon dioxide).  Carbon dioxide cannot be returned to its original substances.

]]> 2024-11-20 01:51:59 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225296299 Example damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225298190 Adding enough heat to an egg will cook it.  Cooking an egg changes how the proteins in the egg are arranged. Once these proteins have been rearranged, they cannot return to their raw form.

]]> 2024-11-20 01:53:13 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225298190 Example damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225299010 When paper burns it changes the original material. The paper turns into ash and smoke.  Once paper has been burned it cannot be returned to its original state.

]]> 2024-11-20 01:53:48 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225299010 Example - boiling water damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225307218 Water boils when heated to a temperature above 100 °C and changes the liquid into steam.  Steam can be cooled and condensed back into its liquid state.

]]> 2024-11-20 01:58:23 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225307218 Example - melting ice damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225309447 When ice is heated it melts from a solid int a liquid (water).  Water can be refrozen back into ice. 

]]> 2024-11-20 01:59:45 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225309447 Example - dissolving salt in water. damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225310940 The salt and water can be separated into their original materials by evaporating the water away from the salt particles.  

]]> 2024-11-20 02:00:40 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225310940 observable changes damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225338089 the material looks different, but no new substance is formed

]]> 2024-11-20 02:14:42 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225338089 observable changes damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225349466 heating or cooling changes the material from one state to another. no new substances are formed.


heating chocolate turned it from solid chocolate into melted chocolate. when it cools it will become solid chocolate again.

]]> 2024-11-20 02:19:46 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225349466 observable changes damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225355307 the materials may make bubbles, light up. get hot, smell different, or change colour.

]]> 2024-11-20 02:22:45 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225355307 observable changes damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225366585 a new substance is formed and is different from the original materials.


when iron is exposed to air and water for a long time it forms a new substance, rust.

]]> 2024-11-20 02:28:51 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225366585 damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225378612 Changes in state. Materials move between...

  • liquid

  • solid

  • gas

But remain the same on a chemical level.

]]> 2024-11-20 02:35:39 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225378612 processes of physical changes damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225386504

  • chopping

  • boiling

  • melting

  • freezing

  • mixing

    • ]]>     2024-11-20 02:40:25 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225386504     processes of chemical change damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225390540

  • burning

  • cooking

  • rusting

  • rotting

  • mixing two or more materials together

  • fermenting

    • ]]>     2024-11-20 02:42:42 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225390540     physical change damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225399827 while a physical change can make materials look different, the new pieces, shape or state remain the same on a chemical level.

    ]]>     2024-11-20 02:47:28 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225399827     Chemical Change damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225403953 a chemical reaction between two or more materials or substances creates a new substance. The new substance is chemically different from the original material.

    ]]>     2024-11-20 02:49:46 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225403953     Sigs of a chemical reaction damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225409227

  • bubbles from gas

  • vapour from gas

  • odours

  • change in colour

  • sounds - fizzing, bubbling, banging, cracking

  • change in temperature - becomes hot or cold

  • lights up

  • precipitation forms (droplets)

    • ]]>     2024-11-20 02:52:43 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225409227     Signs of a physical change damienlmacdonald https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225414598

  • becoming hard

  • becoming soft

  • turning to liquid

  • changing shape

  • chopped into smaller pieces.

    • ]]>     2024-11-20 02:55:42 UTC https://padlet.com/damienlmacdonald/v0anujzbpapzfooe/wish/3225414598