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Question of U1
Question of U1
Q:How are the following terms different? Matter, substance, element, compound, atom, and molecule.
A:Matter, substance, element, compound, atom, and molecule are different things but they have close relationship in science. They are very important when it comes to compose things. First, matter is everything in our life which has its volume and take space. No matter if it is gas, liquid or solid.You can think that ''a bowl of pasta'' is 3 kinds of matters: bowl, seasonings, and pasta . Next, substance is similar to matter but not the same. Substance is matter that has definite composition. Then , compound is a ''pure'' substance formed by atoms of two or more elements. For example, water(H2O) →hydrogen x2 plus oxygen x1. Besides elements is a "pure" substance made of only one kind of atom. Each element is listed in the periodic table. Also, two or more atoms bond together will merge into molecule.Such as O2 is two oxygen bonded together. Last, atom is the smallest unit to build everything in our life.
Q:How does air pressure affect the boiling point of water and why is it important to know that? What does that have to do with pressure cookers?
A: The pressure really effect the temperature which make the water boil. Let's make an example, at sea level, air pressure is about 1 atmosphere, so water boils at about 100 °C .However, when the pressure is lower, the bubble comes out easier and the water can boil in lower temperature.It is important to know because the water seems to boil but the food is still raw, so it will be harder for cooking a food. Now, we take a pressure cooker from my magical backpack, and realized that the pressure cooker will make the pressure higher and the water boil at higher temperature, which make the food cooked faster.
Q:Why is it not a good idea to use mass to identify a substance? Is there a better property for doing so? Which one? Why?
A:Using mass to identify an item isn't a good method.And the reason is that ''mass'' is how heavy a thing is, not what stuff this is, or everyone that is 60kg is the same person(very odd, right?). There is a better way for us to identify a substance, which is using the density(mass/volume). The reason is very easy, it is because that density never change with the amount of that stuff. This characteristic make the density of a same substance always stays the same.For instance, a density of water is 1 g/ml , no matter if there is a cup or a bucket.
Question of U2
Question of U2
How many teaspoons of salt do we need to saturate 100mL of 1. hot water and 2. cold water?
5 teaspoons
4 teaspoons
Why was it easier to saturate the solution with cold water?
The cold water is easier for the solution to saturate, because when the heat decreases, the solubility decrease, meaning less solute can dissolve .To say it clearly, heat up makes breaking the crystal lattice easier and it dissolve better inside the liquid.
NATURAL HAZARDS AND DISASTER
NATURAL HAZARDS AND DISASTER
How are these four terms related: tropical cyclone, hurricane, typhoon, and cyclone? (100-150 words)
Actually, those things :hurricanes, typhoons, and cyclones are mostly the same stuff but happened in different regions. They are both originating over warm waters with organized wind circulation, strong winds, and heavy rain. And they can all deal strong damage to lots of things such as houses, cars and even humans. Their "baby" is called Storm, but when it grows to get a wind speed over 74 miles per hour, it is separated into hurricane, typhoon, and cyclone.
Typhoons are formed in the Northwest Pacific.
Hurricanes are formed in the North Atlantic and Northeast Pacific.
Cyclones are formed in the South Pacific and Indian Ocean.
While tropical cyclone is the scientific umbrella term for powerful, rotating storm systems.
If you could choose anywhere in the world to live, where would you do it? Please explain your answer in terms of the natural hazards and disasters that part of the world might be vulnerable to. (150-200 words)
I started thinking about natural disasters and how scary they can be. Earthquakes, volcanoes, typhoons, and tsunamis can kill people! So, I asked ChatGPT which place has the least natural disasters. One of the answers was Singapore, so I decided to research and check if he was right(my ChatGPT setting is that he is a boy).
After googling, I found out that Singapore ducks fault lines, so earthquakes almost never happen there. There are also no volcanoes nearby, which means no volcanic eruptions at all. Furthermore, the geographical location is not friendly to typhoons and tsunamis. This place is so safe.
All of this makes Singapore feel like a very safe place to live. I wouldn’t have to worry as much about sudden danger or emergency situations. Of course, no place is completely perfect, but Singapore seems calm and stable. Therefore I believe that this place fits my dream more.
Explain in your own words what symbiosis is. Then, list three examples of symbiotic relationships and explain why they are symbiotic. (150-200 words)
Symbiosis is the relationship between pairs of biotic. They works and helps together for more stable and safer life. This kind of situation was really easy to happen in the natural ecosystem, because in the natural forest or other ecosystem, it would be hard to survive without others helping. Also, some species lack certain abilities. Therefore, they need to work with others in order to have a safer life.
There are a lot of example of symbiosis in different ecosystem. Such as clownfish hide inside coral for a shelter from its predictor, while coral also needs clownfish to helps clean itself. Not only plants with animals, plants can helps plants and animal do so, too! Such as ants and aphids, ants protects aphids, while aphids gives food for "salary". Furthermore, animals can combine to another species and cooperate with each others. Just lichen is the combination of algae and fungi. Algae provide nutrients through photosynthesis, while fungi provide water and inorganic salts.
The reason there is symbiotic is because the plants needs more nutrients or protection to stay alive better and safer. Together, all the biotic gets benefits and can live well.
If we think of Taiwan as an ecosystem, what are some of the limiting factors affecting how much the human population can grow? (150-200 words)
To think of Taiwan as an ecosystem, there are some of the factors affecting the population density of Taiwan.
landscape
working opportunity
resource
and those factor can easily affect how much people is there. For instance, if there is no platform but a lot of mountains, people will reject to live here, because it will be difficult and not easy for them to go down or travel from place to place. Then, if there is less work opportunity, which means you cannot earn money at this region, you will also give up on living here because it will be hard for you to stay alive or have a stable life here. Furthermore, if the resource is not rich, you might also don't choose to live at the place. Such as, if there is less water resource, you will give up to live because you cannot take a shower and you cannot drink water freely just like when you have a water fountain.
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