ACTIVITY 2-3 by miriam mabborang https://padlet.com/miriammabborang/blq45bahlgrxmi6o Made with a taste for adventure en-us 2022-04-24 16:58:07 UTC 2025-12-24 04:14:38 UTC hello@padlet.com evidences 0307bivaszhackia https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155802501 Change in smell
change in color
change in temparature
formation of a precipitate
formation of a gas]]> 2022-04-25 02:46:37 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155802501 change in smell symongonzales7 https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155803146 Fresh food gets spoiled when kept unconsumed for a long time]]> 2022-04-25 02:47:12 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155803146 https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155803170 Color Change- if one were to observe the rusting of metal over time, one would realize that the metal has changed color and turned orange
Temperature change- Cookies bake faster at higher temperatures and Bread dough rises more quickly in a warm place than in a cool one.]]> 2022-04-25 02:47:14 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155803170 Color change- if one were to observe the rusting of metal over time, one would realized that the metal has changed color and turned orange. sabrinaangelb https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155803227 2022-04-25 02:47:17 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155803227 Evidences balderasaina53 https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155804612 change in color 
change in odor
formation of gas 
formation of percipitate
release or absorption of energy]]> 2022-04-25 02:47:53 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155804612 arponalexandravivien https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155804733 Formation of precipitate - 
Ex:
Precipitation in water pipes: Hard water consists of many impurities. Magnesium and calcium oxides are generally found in water pipes as precipitates.
Rain and snow: These two are formed when a heated humid air mass collides with a cooler air mass.
]]> 2022-04-25 02:48:00 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155804733 temperature change waynesailatanglao https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155804826 Cookies bake faster at higher temperatures]]> 2022-04-25 02:48:06 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155804826 https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155804980 Change in Temperature
- Bread dough rises more faster when placed in warm area.
- Brownies bake faster at high temperatute.

Change in color
- Rusting of metal, from silver color it turns to be orange due to rust.
- Blue litmus paper turns red when placed in acid.

Change in Odor
- The smell of rotting egg that turns into sulfur smell.
- Unsual odor in air outside during thunderstom which is caused by lightning because of chemical reaction in air, smelling like a coal.

Formation of Gas
- Cake batter rising is caused by a gas-forming reaction between an acid and baking soda (sodium hydrogen carbonate).

Bubbling and Fizzing
- When you mix baking soda and vinegar, you will see fizzing.]]> 2022-04-25 02:48:15 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155804980 formation of precipitate https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155805339 reaction between potassium chloride and silver nitrate]]> 2022-04-25 02:48:30 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155805339 Group 3 cshanenuynuyan https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155805513 EVIDENCES :
1. Change of Color
2. Change of Odor
3. Formation of Precipitation
4. Formation of Gas 
5. Temperature Change ]]> 2022-04-25 02:48:40 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155805513 arponalexandravivien https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155805659 Fire/explosion
Ex:
Fireworks - The sulfur and charcoal act as the fuel, while the potassium-nitrate acts as an oxidizer, which is crucial for the creation of fireworks.
Bonfires


]]> 2022-04-25 02:48:50 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155805659 Examples https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155805728
  • Souring milk
  • Heating sugar to form caramel
  • Rusting of iron
  • Mixing acid and base
  • Digesting food.

    • ]]>     2022-04-25 02:48:54 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155805728     A change in color is also another evidences characteristic of a chemical reaction like for examples is the rusting Roofs or rusting of Iron palmaarabella8 https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155805943 2022-04-25 02:49:07 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155805943 evidence: change in color bolisayjeremyroi https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155806026 example: 
    rusting of metal
    blackening of surfaces of cut vegetables and fruits]]>     2022-04-25 02:49:12 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155806026     formation of a gas symongonzales7 https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155806041 reaction between baking soda and lemon juice

    ]]>     2022-04-25 02:49:13 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155806041     arponalexandravivien https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155806051 Formation of gas - the chemical reaction produces gas as it product
    Ex:
    The reaction between baking soda and lemon juice (citric acid). If you mix baking soda with lemon juice (or vinegar), both substances quickly react to form bubbles.
    Bubbles are made of carbon dioxide gas.
    Cake batter rising is caused by a gas-forming reaction between an acid and baking soda]]>     2022-04-25 02:49:14 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155806051     odor change https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155806276
    Odor is generated when substances change composition. A very common example is rotting of eggs, that have a very different odor from fresh eggs. During the process of rotting, chemical reactions take place and egg's composition changes. Another example is that of odor from the sewers.



    ]]>     2022-04-25 02:49:27 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155806276     Color change- fireworks sabrinaangelb https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155806292 2022-04-25 02:49:27 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155806292 arponalexandravivien https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155806609 Change of smell 
    Ex:
    Rotten egg, during this process chemical changes or reactions happen. 

    Decomposition of waste


    ]]>     2022-04-25 02:49:46 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155806609     change in odor bolisayjeremyroi https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155806755 examples:
    spoilage of foods]]>     2022-04-25 02:49:54 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155806755     change in color and temperature 0307bivaszhackia https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155806788 caramelization of sugar

    ]]>     2022-04-25 02:49:56 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155806788     The formation of bubbles when two liquids are mixed usually indicates that a gas has formed. samanthamae247 https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155807128 2022-04-25 02:50:13 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155807128 change in odor salvatierrajenesis https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155807336 When two or more compounds or elements are mixed and a scent or odor is present, a chemical reaction has taken place. For example, when an egg begins to smell, (a rotten egg) a chemical reaction has taken place.]]> 2022-04-25 02:50:26 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155807336 Formation of a gas https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155808230 Many reactions produce a gas such as carbon dioxide, hydrogen sulfide, ammonia, or sulfur dioxide. Cake batter rising is caused by a gas-forming reaction between an acid and baking soda (sodium hydrogen carbonate).]]> 2022-04-25 02:51:22 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155808230 formation of gas balderasaina53 https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155808332 baking soda added to vinegar 
    creates carbon dioxide gas]]>     2022-04-25 02:51:29 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155808332     Formation of a precipitate https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155811408
    chemical reactions:precipitation. The precipitate forms because the solid (AgCl) is insoluble in water. For example, sometimes the pipes in our homes get clogged because precipitates of magnesium and calcium oxides have deposited themselves within the pipes.



    ]]>     2022-04-25 02:54:42 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155811408     New matter is formed 0307bivaszhackia https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155811952 rusting of iron.]]> 2022-04-25 02:55:20 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155811952 Change in Color https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155812218 Vegetables and fruits turns brown when expose to air ( oxidation reaction )]]> 2022-04-25 02:55:37 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155812218 release of absorption of energy https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155812975 By comparing the energy absorbed when bonds in the reactants are broken with the energy released when bonds in the products are formed, you can determine whether a chemical reaction releases energy or absorbs energy overall. Chemical reactions that release energy are called exothermic.]]> 2022-04-25 02:56:15 UTC https://padlet.com/miriammabborang/blq45bahlgrxmi6o/wish/2155812975