Category: Stem

Acid and Base

Acid

Acid is an ionic compound that produces positive hydrogen ions when it dissolve in water. Sour taste is one property of acid but never taste an something to know that it is acid. Acid can conduct electricity because it consist charged particle in the solution. To detect acid, you can use the blue litmus paper and if you put some drop of acid on it, it will turn the paper to red. Example of acid: Lemon, Soda, Bananas, Battery….

Base

Base is an ionic compound that produces positive negative ions when it dissolve in water. Base taste bitter but never taste something to see if it is a base. Base are also slippery and conduct to electricity. To detect base is when the litmus paper from pink to blue. Example of base are: Soap, Vinegar, Blood, Bleach…

Ph scale

Ph scale is use to scale the strength of acid and base. Look at the Ph scale at the bottom. There are  0 to 14, and for 7 it is neutral. It mean that it is either acid or base(ex: pure water).For acid, the strongest acid have a ph close to zero. For base, the strongest base have a ph close to fourteen.

After I learn about this lesson, I know a lot about acid and base. Before I don’t even know what is acid and base so it is kinda hard to catch up with the lesson. However, asking my friend and read more help me a lot. I hope you enjoy this writing and I hope you learn something.

Carbon cycle

 

                 Carbon is one of the elements that is located in the row 2 group 14 and it’s the symbol is C. Carbon is really important because there are a lot of things that have Carbon in it, such as pencil leads, coals, chalks, and even diamonds. It also helps a lot of things such as photosynthesis, breaking down wastes, make glucose for human and more. All of that stuff is called the carbon cycle, it is the cycle of the carbon at the atmosphere, on land, and underground(the picture above). There are many processes in the carbon cycle

• Photosynthesis: when the tree absorbs the carbon dioxide from the air and release the oxygen back to the air.
• Respiration: the process that happens in al living things and adds carbon dioxide to the atmosphere.

• Animal respiration – when animal fart, poop, or waste that release the C02 to the atmosphere.
• Plant respiration – when the trees release the C02 at night.
• Decomposition: when the bacteria break down dead plants, animal, waste and more and returns the nutrients to the soil to be taken up by the plants.
• Combustion: the process that gets bunned by human activity and adds carbon dioxide to the atmosphere.