Property of the material
Metal and nonmetal
It is a material with four properties that are lower than metal … An example: Magnesium aluminum, zinc, mercury, iron, copper, silver, money
- I show special brightness when I polish it (metallic luster)
- I stretch it out and I open it and can do it. (I call this property malleability, ductility)
- Heat is easy to come (thermal conductivity)
- Electricity is easy to flow (electrical conduction characteristics)
It is a material except the nonmetal … metal. An example: Oxygen, water, glass
※Iron is close together to a magnet, but there is not the property attracted by a magnet despite the property that is common to metal because copper or silver are not close together to a magnet.
Material … iron, cobalt nickel which is close together to a magnet
Organic matter, inorganic matter
A material including organic matter … carbon and hydrogen. An example: Sugar, plastic, paper, methane propane
Water and carbon dioxide are made when they burn organic matter.
※Because I learn with a material including carbon at the junior high school, I will learn it like that.
The material which includes inorganic … carbon and hydrogen neither. An example: Salt, carbon, carbon dioxide, iron, aluminum
It is easy to be revealed that even a material including carbon including carbon and carbon dioxide thinks that what is classified in an inorganic matter does not include hydrogen.
※Because I learn with the material which does not include carbon at the junior high school, I will learn it like that.
Because it becomes long, I gather up the detailed reason why carbon is not organic matter in this page.
Plastic
I am called a synthetic resin with the thing that plastic … oil was composed as raw materials artificially. In addition, the plastic is organic matter with nonmetal.
[characteristic of plastic]
- It is lighter than metal
- It does not conduct electricity
- I give carbon dioxide when I burn
- It is not rusted
- It is easy to process it by heat and power
- I am not corrupt
| Kind | Polyethylene terephthalate | Polyethylene | Polypropylene | Polystyrene | Polyvinyl chloride |
| Abbreviated designation | PET | PE | PP | PS | PVC |
| Characteristic | I sink into the waterTransparence
Strong |
I float in the waterI am strong in a medicine | I float in the water I am strong in heat | I sink into the waterI am obstinate, but am easy to be broken | I sink into the waterFlame retardant
Strong |
| Use | The main body of plastic bottleEgg pack | Lap for foodPlastic bag | Cover of the plastic bottleStraw | Food trayFiring polystyrene | Water pipeElectric cord |
Density of the material
The density … unit volume
※A problem to ask a definition of the density in a super barrier school has been made questions for, but determine it
3
When temperature is constant, the density is fixed by the kind of the material.
| Material | Density |
| Water | 1.00 |
| Ice | 0.92 |
| Ethanol | 0.79 |
| Aluminum | 2.70 |
| Oil | Approximately 0.92 |
※The density is related to the ups and downs of the object.
The reason why ice (density 0.9) floats on Wednesday (density 1.0) is that density is smaller ice.
- A person having a small density goes to the top, and a person having a small density goes below.
You should learn と. Knowledge here is applied to the upper displacement method and the downward substitution method of the gaseous property page.
Water collects oil on in density being smaller oil below when I pour oil into the water. Because knowledge here is related.
Specifically, I refer to the water pressure and buoyancy.
Inder
The appliance which measures the volume of the inder … liquid. (I can measure the solid volume by how to use, too.)
[how to use inder]
- I put the inder in the horizontal place.
- The position of eyes makes the height of the surface.
- When I read a scale, I read the horizontal place of the surface horizontally from the just beside.
- I read it to a one-tenth of the height of one in a measurement by eye.
To read it to a one-tenth of 1 memory?
For example, 1 memory
In other words, let’s read it in a measurement by eye saying that there are ten scales in the meantime even if there was the horizontal place of the surface between a scale and scales. It means. In the right figure, it is 62
Gas burner
[the ignition of the gas burner]
- I confirm that a gas adjustment screw, an air-conditioning screw closes.
- I open in order of the main cock, a cook of the gas.
- I loosen a gas adjustment screw and light it after setting fire to a match.
- I open the air-conditioning screw while holding the gas adjustment screw and will have blue flame.
[fire extinguishing of the gas burner] if learn it with reverse of the ignition, is OK
- I close an air-conditioning screw.
- I close a gas adjustment screw.
- I close a cook.
- I close the main cock.
※When air is short, it becomes the orange long flame.
Upper plate balance
The labware which measures the mass of the upper plate balance … material
I put the upper plate balance on a horizontal stand and regulate it with an adjustment screw so that a guidance can add only the same breadth to right and left.
In the case of a right-handed person, I perform the one that I pick you up on the plate frequently and take down in a right plate. (as for the left-handed person the reverse)
When example 1 measures the mass of the object which there is; a plate right in a plate left an object a weight
When I want to measure the medicine of 2.20 g of examples, I put a weight of 20g on the left plate and put a medicine on the right plate.
In addition, when I handle a medicine, I put a paper for wrapping individual doses of powdered medicine in both plates without riding a medicine on a direct plate and pick up a medicine on the top.
I put a plate on one after the measurement.
※Because a guidance can add only the same breadth to right and left, I can confirm that both plates of the upper plate balance are balanced.
A guidance is attention in what I do not confirm by having stopped in the middle.