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Unit 2: Matter and Changes
Answer Essential Questions
1. How and why does matter change?
The matter able to change in two ways
1.1 Phsical canges are change of the matter's appearance but not change what they made of such as changes of state,size,shape and appearance of matter. Mostly this type of chande can reverse easily ;for example, changesing of state when water freezes and makes ice, it is still water. It has only changed its state of matter from a liquid to a solid. It has changed its appearance and shape, but it is still water. You can change the ice back into water by letting it melt. Matter looks different when it changes states, but it stays the same kind of matter.
1.2 chemical changes are change in the component of the matter to make the new kind of substance such as Photosynthesis,respiration, combustion,digestion etc. For exanple, the combustion of fuel to produce energy water and carbondioxide.
2. How and why do we classify matter?
We can classify matter in two ways phicical and chimical. The matter can be classify as states which this used to classify the kinds of matter that exist. Matter can exist in four states solid ,liquid, gas and Plasma. So, it's important to know the states of the matter because we will know what is it made of. Every substances are made up of smaller particles some of those particles can be split into smaller units called atoms. Atoms are the building blocks of elements. Elements are pure substant (all substances that haven't ever been separated into others substances) usually is solide. However, it is very important to know when elements are mixing together(elementcompond) because if we didn't know what the elements are and what type of things they are then it could be very dangerous. This is why we will have to know when we mix the elements together to make it useful for all human. For example, milk is elements compound that classify as liquide and it made of
3. What is happening at the particle level?
Firstly, When a solid melts, the particles speed up faster than they were when they were a solid. Take ice for instance, when the liquid is frozen, the particles are tightly packed and it very very slow. When the solide starts to melt, the particles speed up a little bit and they spread apart. Not as fast as it's at boiling point and not as far apart either. When the liquide at the boiling point the particles start to move really fast and hit each other at a very fast pace. They also are spread farther apart from each other.
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4. How does what you learned connect to the real world?
Thailand weather is quite hot. So, we usually drink cold water which could be produced by adding ice to the water and the process to make ice is the physical change which is called Freezing. Moreover, the digestion method in our stomache is chemical change of food to vitamin for our body by many sub-processes.
5. How did you develop or grow as a student through this unit?
Previously I have known only 3 states of matter. This unit is mentioned about plasma which is similar to gas but we don't focus on it much. Also, I have learn that classify thing in chimals way is really important becuase elements compoumd can be helpful and harmful to me. If I know differnt of elements when it mix together it can cause harm or goodnes.
6. As you look at the work you have completed throughout this unit, what are you strengths?
I have strengths to identify type of matter change which is physical or chemical. Phsical is like the state of matter and chimecal is like mixing of elements in different state. For example, Phisical is changeing state of matter to solide,liquid or gas and Chemica is to know what is it made of and mix the elements to have a new substance to develop and help human.
7. As you look at the work you have completed throughout this unit, what do you think you could improve?
I would like to improve my skill of idetify the name of state change such as freezing, sublimation and etc.
Also, knowing more what are some new substance that might be harmful to other people in this world.
8. Evidence (Images, Essays, Reports, Posters, etc)